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Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Alloy additive"

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Gneiger, Stefan, Johannes A. Österreicher, Aurel R. Arnoldt, Alois Birgmann, and Martin Fehlbier. "Development of a High Strength Magnesium Alloy for Wire Arc Additive Manufacturing." Metals 10, no. 6 (June 10, 2020): 778. http://dx.doi.org/10.3390/met10060778.

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Анотація:
Due to their high specific strength, magnesium alloys are promising materials for further lightweighting in mobility applications. In contrast to casting and forming processes, additive manufacturing methods allow high degrees of geometrical freedom and can generate significant weight reductions due to load-specific part design. In wire arc additive manufacturing processes, large parts can be produced with high material utilization. Process-inherent high melt temperatures and solidification rates allow for the use of magnesium alloys which are otherwise complicated to process; this enables the use of unconventional alloying systems. Here, we report the development of a Mg-Al-Zn-Ca-rare earth alloy for wire arc additive manufacturing (WAAM). Compared to parts made of commercially available filler wire, the newly developed alloy achieves a higher strength (approx. +9 MPa yield strength, +25 MPa ultimate tensile strength) in WAAM.
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2

Wen, Shifeng, Jie Gan, Fei Li, Yan Zhou, Chunze Yan, and Yusheng Shi. "Research Status and Prospect of Additive Manufactured Nickel-Titanium Shape Memory Alloys." Materials 14, no. 16 (August 11, 2021): 4496. http://dx.doi.org/10.3390/ma14164496.

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Анотація:
Nickel-titanium alloys have been widely used in biomedical, aerospace and other fields due to their shape memory effect, superelastic effect, as well as biocompatible and elasto-thermal properties. Additive manufacturing (AM) technology can form complex and fine structures, which greatly expands the application range of Ni-Ti alloy. In this study, the development trend of additive manufactured Ni-Ti alloy was analyzed. Subsequently, the most widely used selective laser melting (SLM) process for forming Ni-Ti alloy was summarized. Especially, the relationship between Ni-Ti alloy materials, SLM processing parameters, microstructure and properties of Ni-Ti alloy formed by SLM was revealed. The research status of Ni-Ti alloy formed by wire arc additive manufacturing (WAAM), electron beam melting (EBM), directional energy dedication (DED), selective laser sintering (SLS) and other AM processes was briefly described, and its mechanical properties were emphatically expounded. Finally, several suggestions concerning Ni-Ti alloy material preparation, structure design, forming technology and forming equipment in the future were put forward in order to accelerate the engineering application process of additive manufactured Ni-Ti alloy. This study provides a useful reference for scientific research and engineering application of additive manufactured Ni-Ti alloys.
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Wahlmann, Benjamin, Dominik Leidel, Matthias Markl, and Carolin Körner. "Numerical Alloy Development for Additive Manufacturing towards Reduced Cracking Susceptibility." Crystals 11, no. 8 (July 31, 2021): 902. http://dx.doi.org/10.3390/cryst11080902.

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Анотація:
In this work, we investigated the viability of established hot cracking models for numerically based development of crack-resistant nickel-base superalloys with a high γ′ volume fraction for additive manufacturing. Four cracking models were implemented, and one alloy designed for reduced cracking susceptibility was deduced based on each cracking criterion. The criteria were modeled using CALPHAD-based Scheil calculations. The alloys were designed using a previously developed multi-criteria optimization tool. The commercial superalloy Mar-M247 was chosen as the reference material. The alloys were fabricated by arc melting, then remelted with laser and electron beam, and the cracking was assessed. After electron beam melting, solidification cracks were more prevalent than cold cracks, and vice versa. The alloys exhibited vastly different crack densities ranging from 0 to nearly 12 mm−1. DSC measurements showed good qualitative agreement with the calculated transition temperatures. It was found that the cracking mechanisms differed strongly depending on the process temperature. A correlation analysis of the measured crack densities and the modeled cracking susceptibilities showed no clear positive correlation for any crack model, indicating that none of these models alone is sufficient to describe the cracking behavior of the alloys. One experimental alloy showed an improved cracking resistance during electron beam melting, suggesting that further development of the optimization-based alloy design approach could lead to the discovery of new crack-resistant superalloys.
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4

Hussein, Suhair G., Adnan N. Abood, and Nabeel Kadim Abdel Sahib. "Effect of SiC Powder Additive on Mechanical Properties of Al-Pb Alloy Produced by Mechanical Alloying." Al-Nahrain Journal for Engineering Sciences 21, no. 3 (September 1, 2018): 389–92. http://dx.doi.org/10.29194/njes.21030389.

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Анотація:
One of the major usages for Al–Pb alloy are bearing alloys because of its lubricant behavior of Pb phase component. Applications of these alloys are in heavy duty, such as boring mills, presses, lathes, milling machines and hydraulic pump bushings. In present work, SiC powder was selected as additive for improving the mechanical properties of Al-Pb alloy that produced by mechanical alloying method. The percentage weight of SiC powder are (2.5, 5,10, 15 %) which mixing together with Al- Pb alloy for two hours in ball milling device, then compacted and sintering to obtain the improved alloy, and examine the mechanical properties (compressive strength and microhardness) of produced alloy. Results show that the additive of SiC powder on the Al-Pb alloy lead to improve the microhardness which increased with increased the percentage of additive, in the other hand, the compressive strength had a reverse effective with increased the percentage of SiC powder.
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5

Asmael, M. B. A., Roslee Ahmad, Ali Ourdjini, and S. Farahany. "Effect of Elements Cerium and Lanthanum on Eutectic Solidification of Al-Si-Cu near Eutectic Cast Alloy." Advanced Materials Research 845 (December 2013): 118–22. http://dx.doi.org/10.4028/www.scientific.net/amr.845.118.

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Анотація:
The properties of Al-Si-Cu cast alloys are strongly affected by eutectic Al-Si and Al-Cu phases. The characteristic parameters of these two phases with additions cerium 1wt % (Ce) and lanthanum1 wt % (La) were investigated in Al-11Si-2Cu near eutectic alloy using computer-aided cooling curve thermal analysis. As a result, the La additive showed the highest (TNAl-Si) while the Ce additive showed very little effect. In addition, the growth temperature (TGAl-Si) is decreased by adding Ce compared to the base alloy and La addition. Additives showed an increase of recalescence magnitude (TRAl-Si). Addition La and Ce increased the nucleation and growth temperature of Al-Cu phase. The microstructure analysis on the silicon morphology showed that 1 wt % La and 1 wt % Ce additions play refiner role in Al-Si-Cu near eutectic alloys. Findings are also confirmed by aspect ratio of eutectic silicon phase.
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6

Prashanth, Konda Gokuldoss, and Zhi Wang. "Additive Manufacturing: Alloy Design and Process Innovations." Materials 13, no. 3 (January 23, 2020): 542. http://dx.doi.org/10.3390/ma13030542.

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Liu, Shunyu, and Yung C. Shin. "Additive manufacturing of Ti6Al4V alloy: A review." Materials & Design 164 (February 2019): 107552. http://dx.doi.org/10.1016/j.matdes.2018.107552.

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Knoll, Helene, Sörn Ocylok, Andreas Weisheit, Hauke Springer, Eric Jägle, and Dierk Raabe. "Combinatorial Alloy Design by Laser Additive Manufacturing." steel research international 88, no. 8 (December 19, 2016): 1600416. http://dx.doi.org/10.1002/srin.201600416.

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Lindwall, Greta, and Wei Xiong. "CALPHAD-Based Methods for Alloy Additive Manufacturing." Journal of Phase Equilibria and Diffusion 42, no. 1 (February 2021): 3–4. http://dx.doi.org/10.1007/s11669-021-00870-4.

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Langelandsvik, Geir, Odd M. Akselsen, Trond Furu, and Hans J. Roven. "Review of Aluminum Alloy Development for Wire Arc Additive Manufacturing." Materials 14, no. 18 (September 17, 2021): 5370. http://dx.doi.org/10.3390/ma14185370.

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Анотація:
Processing of aluminum alloys by wire arc additive manufacturing (WAAM) gained significant attention from industry and academia in the last decade. With the possibility to create large and relatively complex parts at low investment and operational expenses, WAAM is well-suited for implementation in a range of industries. The process nature involves fusion melting of a feedstock wire by an electric arc where metal droplets are strategically deposited in a layer-by-layer fashion to create the final shape. The inherent fusion and solidification characteristics in WAAM are governing several aspects of the final material, herein process-related defects such as porosity and cracking, microstructure, properties, and performance. Coupled to all mentioned aspects is the alloy composition, which at present is highly restricted for WAAM of aluminum but received considerable attention in later years. This review article describes common quality issues related to WAAM of aluminum, i.e., porosity, residual stresses, and cracking. Measures to combat these challenges are further outlined, with special attention to the alloy composition. The state-of-the-art of aluminum alloy selection and measures to further enhance the performance of aluminum WAAM materials are presented. Strategies for further development of new alloys are discussed, with attention on the importance of reducing crack susceptibility and grain refinement.
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Більше джерел

Дисертації з теми "Alloy additive"

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Palanivel, Sivanesh. "Thermomechanical Processing, Additive Manufacturing and Alloy Design of High Strength Mg Alloys." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849628/.

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Анотація:
The recent emphasis on magnesium alloys can be appreciated by following the research push from several agencies, universities and editorial efforts. With a density equal to two-thirds of Al and one-thirds of steel, Mg provides the best opportunity for lightweighting of metallic components. However, one key bottleneck restricting its insertion into industrial applications is low strength values. In this respect, Mg-Y-Nd alloys have been promising due to their ability to form strengthening precipitates on the prismatic plane. However, if the strength is compared to Al alloys, these alloys are not attractive. The primary reason for low structural performance in Mg is related to low alloying and microstructural efficiency. In this dissertation, these terminologies are discussed in detail. A simple calculation showed that the microstructural efficiency in Mg-4Y-3Nd alloy is 30% of its maximum potential. Guided by the definitions of alloying and microstructural efficiency, the two prime objectives of this thesis were to: (i) to use thermomechanical processing routes to tailor the microstructure and achieve high strength in an Mg-4Y-3Nd alloy, and (ii) optimize the alloy chemistry of the Mg-rare earth alloy and design a novel rare—earth free Mg alloy by Calphad approach to achieve a strength of 500 MPa. Experimental, theoretical and computational approaches have been used to establish the process-structure-property relationships in an Mg-4Y-3Nd alloy. For example, increase in strength was observed after post aging of the friction stir processed/additive manufactured microstructure. This was attributed to the dissolution of Mg2Y particles which increased the alloying and microstructural efficiency. Further quantification by numerical modeling showed that the effective diffusivity during friction stir processing and friction stir welding is 60 times faster than in the absence of concurrent deformation leading to the dissolution of thermally stable particles. In addition, the investigation on the interaction between dislocations and strengthening precipitate revealed that, specific defects like the I1 fault aid in the accelerated precipitation of the strengthening precipitate in an Mg-4Y-3Nd alloy. Also, the effect of external field (ultrasonic waves) was studied in detail and showed accelerated age hardening response in Mg-4Y-3Nd alloy by a factor of 24. As the bottleneck of low strength is addressed, the answers to the following questions are discussed in this dissertation: What are the fundamental micro-mechanisms governing second phase evolution in an Mg-4Y-3Nd alloy? What is the mechanical response of different microstructural states obtained by hot rolling, friction stir processing and friction stir additive manufacturing? Is defect engineering critical to achieve high strength Mg alloys? Can application of an external field influence the age hardening response in an Mg-4Y-3Nd alloy? Can a combination of innovative processing for tailoring microstructures and computational alloy design lead to new and effective paths for application of magnesium alloys?
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2

Puleo, Shawn Michael. "Additive Friction Stir Manufacturing of 7055 Aluminum Alloy." ScholarWorks@UNO, 2016. http://scholarworks.uno.edu/honors_theses/75.

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Анотація:
The objective of the report is to investigate the feasibility and reliability of additive friction stir manufacturing of 7055 aluminum alloy. This is a technique in which multiple lap welds are performed to create a three-dimensional part out of relatively thin plate aluminum. To accomplish this, a four inch stack of 7055 aluminum alloy lap welds must be created. The solid weld nugget is then machined out of the center of the welded stack to create ASTM approved subsize tensile coupons. Rockwell hardness, yield strength, ultimate tensile strength, and percent elongation information is gathered from the tensile coupons to investigate the effectiveness of the additive friction stir manufacturing process. The data shows that the additive manufactured material experiences a significant reduction in strength and percent elongation while not showing any significant response to heat treatment. Suggestions are made regarding possible changes to the weld schedule that could improve the material properties of the additive manufactured aluminum.
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3

Kumara, Chamara. "Microstructure Modelling of Additive Manufacturing of Alloy 718." Licentiate thesis, Högskolan Väst, Avdelningen för avverkande och additativa tillverkningsprocesser (AAT), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-13197.

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Анотація:
In recent years, additive manufacturing (AM) of Alloy 718 has received increasing interest in the field of manufacturing engineering owing to its attractive features compared to those of conventional manufacturing methods. The ability to produce complicated geometries, low cost of retooling, and control of the microstructure are some of the advantages of the AM process over traditional manufacturing methods. Nevertheless, during the building process, the build material undergoes complex thermal conditions owing to the inherent nature of the process. This results in phase transformation from liquid to solid and solid state. Thus, it creates microstructural gradients in the built objects, and as a result,heterogeneous material properties. The manufacturing process, including the following heat treatment that is used to minimise the heterogeneity, will cause the additively manufactured material to behave differently when compared to components produced by conventional manufacturing methods. Therefore, understanding the microstructure formation during the building and subsequent post-heat treatment is important, which is the objective of this work. Alloy 718 is a nickel-iron based super alloy that is widely used in the aerospace industry and in the gas turbine power plants for making components subjected tohigh temperatures. Good weldability, good mechanical properties at high temperatures, and high corrosion resistance make this alloy particularly suitablefor these applications. Nevertheless, the manufacturing of Alloy 718 components through traditional manufacturing methods is time-consuming and expensive. For example, machining of Alloy 718 to obtain the desired shape is difficult and resource-consuming, owing to significant material waste. Therefore, the application of novel non-conventional processing methods, such as AM, seems to be a promising technique for manufacturing near-net-shape complex components.In this work, microstructure modelling was carried out by using multiphase-field modelling to model the microstructure evolution in electron beam melting (EBM) and laser metal powder directed energy deposition (LMPDED) of Alloy 718 and x subsequent heat treatments. The thermal conditions that are generated during the building process were used as input to the models to predict the as-built microstructure. This as-built microstructure was then used as an input for the heat treatment simulations to predict the microstructural evolution during heat treatments. The results showed smaller dendrite arm spacing (one order of magnitude smaller than the casting material) in these additive manufactured microstructures, which creates a shorter diffusion length for the elements compared to the cast material. In EBM Alloy 718, this caused the material to have a faster homogenisation during in-situ heat treatment that resulting from the elevated powder bed temperature (> 1000 °C). In addition, the compositional segregation that occurs during solidification was shown to alter the local thermodynamic and kinetic properties of the alloy. This was observed in the predicted TTT and CCT diagrams using the JMat Pro software based on the predicted local segregated compositions from the multiphase-field models. In the LMPDED Alloy 718 samples, this resulted in the formation of δ phase in the interdendritic region during the solution heat treatment. Moreover, this resulted in different-size precipitation of γ'/γ'' in the inter-dendritic region and in the dendrite core. Themicro structure modelling predictions agreed well with the experimental observations. The proposed methodology used in this thesis work can be an appropriate tool to understand how the thermal conditions in AM affect themicro structure formation during the building process and how these as-built microstructures behave under different heat treatments.
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4

Cao, Pengcheng. "Characterization of Laser Deposited Alloy 718." Thesis, KTH, Materialvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-182603.

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Анотація:
Additive Manufacturing (AM) is a method of producing three-dimensional objects using additive processes. It allows great flexibility in the processes and reduces the design-to-production time. Laser Metal Deposition (LMD) is one of AM methods under development and is based on the deposition technology. LMD has advantages in grain growth control, material functional grading, lower material storage requirement and more spatial freedom. Considering the outstanding features, it is important to study the characteristics of LMD products, which in this study is Alloy 718 for aerospace applications. Single-wall Laser LMD samples are built with varied process parameters using gas-atomized Alloy 718 powders. Two experiments were carried out with focuses on 1) evaluations and comparisons of the microstructural characteristics, porosity and hardness of the samples are performed; 2) The effect of heat treatments including solution treatment and aging on the microstructure as well as the hardness. The results of the experiments revealed directional solidification features and typical phases such as γ matrix, Laves phase and carbide. 0.06% average porosity and a majority of < 20 µm size are measured from the LMD samples. Only spherical gaseous pores are found while no lack-of-fusion pore is found. A hardness Vickers of 246 in average hardness is measured from the LMD samples. In the heat treated samples, δ phases were found; By direct-aging at 750 ℃ for 10 to 15 hours, the samples reach a maximum hardness of around 382 HV. The same hardness was reached by 1 hour of solution treatment at 950 ℃ followed by 5 hours aging at 750 ℃. The effects of processing parameters on the characteristics of LMD processed Alloy 718 are compared and discussed. A 2-dimentional map of porosity distribution along the length of the sample is made and the patterns are investigated along both the length and the height of the sample. It is found in the sample that the starting part of the deposit is higher in number of pores while the finishing part is larger in pore size. It is also found that the top layer of the deposit has the highest porosity level, pore number and pore size. Moreover, the hardness gradient along the build-up direction is evaluated and discussed. No significant hardness gradient was found. The precipitation hardening effect of LMD process and possible improvements are also discussed.
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5

Wang, Xueyuan. "Predicting fatigue crack growth life in additive manufactured titanium alloy." Thesis, Coventry University, 2016. http://curve.coventry.ac.uk/open/items/723714e9-2b61-4464-b6b9-a9c05a0a74b0/1.

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Анотація:
The aim of this PhD project is to investigate the fatigue crack propagation behaviour in an additive manufactured high strength titanium alloy, Ti-6Al-4V. Test specimens were made by the Wire+Arc Additive Manufacture (WAAM) process. The research focus is the fatigue crack behaviour (crack growth rate and trajectory) near interface between WAAM and substrate materials. The challenges are the understanding and assessment of the effects of residual stress, microstructure change and anisotropic material properties as the result of rapid heating and cooling, and rapid solidification cycles in additive manufacturing. This PhD project has focused on numerical modelling and simulation of fatigue crack behaviour. Specimen fabrication and experimental tests were conducted by our collaborators in linked projects. Finite element method (FEM) was employed to evaluate the influence of anisotropic Young's modulus and yield strength properties on the crack tip stress intensity factor and crack tip plasticity. Residual stress distribution in the compact tension, C(T), specimens were obtained by FEM based on experimentally measured residual stress in a much larger WAAM-substrate wall, from which the C(T) specimens were extracted. Residual stress profile was also established by an analytical approach for another WAAM-substrate wall, from which the fatigue crack growth rates (FCGR) for pure WAAM material were measured. Based on these calculations, fatigue crack growth rate and life were predicted by empirical methods from the Linear Elastic Fracture Mechanics, namely the modified Paris law and the Harter T-method. Residual stress effect is accounted for by the superposition method, via the effective R ratio parameter. Key findings and main conclusions are: (1) the difference in the stress intensity factor is less than 1% when considering the anisotropic material properties. Therefore, the influence of anisotropic material properties on the crack growth driving force can be neglected. (2) After extracting a C(T) specimen from a larger wall sample, retained residual stress in the C(T) specimen is much reduced; consequently the stress intensity factor due to the residual stress is also small. (3) Residual stress free assumption is not valid for C(T) specimens which provide FCGR data for pure WAAM material. (4) The Harter T-method is better when predicting FCGRs in WAAM material and residual stress effect should not be ignored. (5) Predicted fatigue crack growth life for the specimens containing WAAM-substrate interface have a difference about 25% compared to experiments. Predicted fatigue crack deviation angles for various crack locations and orientations are consistently larger than the experimental measurement, as the crack closure has reduced the effect of mode II stress intensity factor.
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6

Mikler, Calvin. "Laser Additive Manufacturing of Magnetic Materials." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1011873/.

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Анотація:
A matrix of variably processed Fe-30at%Ni was deposited with variations in laser travel speeds as well and laser powers. A complete shift in phase stability occurred as a function of varying laser travel speed. At slow travel speeds, the microstructure was dominated by a columnar fcc phase. Intermediate travel speeds yielded a mixed microstructure comprised of both the columnar fcc and a martensite-like bcc phase. At the fastest travel speed, the microstructure was dominated by the bcc phase. This shift in phase stability subsequently affected the magnetic properties, specifically saturation magnetization. Ni-Fe-Mo and Ni-Fe-V permalloys were deposited from an elemental blend of powders as well. Both systems exhibited featureless microstructures dominated by an fcc phase. Magnetic measurements yielded saturation magnetizations on par with conventionally processed permalloys, however coercivities were significantly larger; this difference is attributed to microstructural defects that occur during the additive manufacturing process.
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Aboulkhair, Nesma T. "Additive manufacture of an aluminium alloy : processing, microstructure, and mechanical properties." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/31152/.

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Анотація:
Additive manufacturing of aluminium alloys using selective laser melting (SLM) is of research interest nowadays because of its potential benefits in industry sectors such as aerospace and automotive. However, in order to demonstrate the credibility of aluminium SLM for industrial needs, a comprehensive understanding of the interrelation between the process parameters, produced microstructure, and mechanical behaviour is still needed. This thesis aims at contributing to developing this comprehensive understanding through studying the various aspects of the process, with investigation of the powder raw material to the near fully dense samples, focussing on the alloy AlSi10Mg. The primary building blocks in the SLM process are the single tracks. Their formation is affected by the physical properties of the material that control the laser-material interactions. Keyhole mode melting was found to be dominant when processing AlSi10Mg, producing conical-shaped melt pools. Porosity was not evident in single tracks and individual layers. Satellites and balling defects, however, were observed on top of the tracks and layers at higher scan speeds, which contribute to porosity formation with layer progression. The combination of process parameters controls the amount of porosity formed, with the scan speed controlling the type of pore; metallurgical or keyhole pore. A pre-melt scan strategy significantly reduced porosity and successfully produced 99.8% dense samples. Furthermore, the pre-melt scan strategy was seen to effectively reduce the number of pores developed when using powder that does not fully comply with the process standards. The gas flow rate within the process chamber controlled laser spatter and condensate removal during processing, which in its turn affected the degree of porosity in the samples. The SLM process resulted in an AlSi10Mg alloy with a characteristically fine microstructure, with fine equiaxed grains at the melt pool core and coarser elongated grains at the boundary. The material showed a strong texture, owing to directional solidification. Cellular dendritic Al with inter-dendritic Si was observed. The material was subjected to a T6 heat treatment that transformed the microstructure into spheroids of Si in the Al matrix. This study investigated, for the first time, the local mechanical properties within the SLM material using nanoindentation. This showed a uniform nano-hardness profile that was attributed to the fine microstructure and good dispersion of the alloying elements. Spatial variation within the material was recorded after the T6 heat treatment due to phase transformation. This study is also the first to report on the compressive behaviour of solid SLM material, which is important for developing prediction and simulation models. The heat treatment softened the material and provided it with an increased ductility under indentation, tensile, and compressive types of loading. In addition, the material showed good fatigue performance, which was further improved by heat treatment and machining to obtain a smoother surface roughness. This investigation has, therefore, developed an understanding of the various aspects of the SLM process yielding near fully dense parts and defined the microstructure-mechanical property interrelation promoting the process for Al alloys in a number of industrial sectors.
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8

Gavelius, Marianne, and Karin Andersson. "Surface Treatment for Additive Manufactured Aluminum Alloys." Thesis, Linköpings universitet, Molekylär ytfysik och nanovetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-169027.

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Анотація:
Manufacturing of aircraft parts is often complex and time-consuming, which has led to an increased interest in new manufacturing technologies in the Swedish industry such as additive manufacturing (AM). Additive manufacturing techniques could be a solution to meet the aircrafts’ demand since it contributes to an efficient manufacturing and allows a just-in-time production of complex metal parts in their final shape. However, the use of AM aluminum for aircraft applications is in a development phase and no surface treatment process exists. Thereby, it is of high interest to further investigate surface treatments for AM alloys. Currently at Saab AB, conventional aluminum alloys are generally anodized in tartaric sulphuric acid (TSA) to improve the corrosion resistance and adhesion properties of the metal. On the behalf of Saab AB, there is also an interest in establishing powder coating as a surface treatment. This master thesis’ purpose is to investigate the anodizing and adhesion properties for the two additive manufacturing alloys - AlSi10Mg and ScalmalloyⓇ, and compare it with the conventionally produced Al alloy 2024-T3. The anodization and the powder coating is examined by using following characterization techniques: profilometry, light microscopy, scanning electron microscopy and contact angle measurements. The results from the experimental part indicated successful anodizations for all the alloys and good adhesion properties for powder coating. This research is a first step in contributing to a better understanding of the anodic coating and adhesion properties for the AM samples ScalmalloyⓇ and AlSi10Mg
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Sheridan, Luke Charles. "An Adapted Approach to ProcessMapping Across Alloy Systems and Additive Manufacturing Processes." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1471861921.

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10

Tollander, Sofia, and Mona Kouach. "Repeatability of Additive Manufactured Parts." Thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209804.

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Анотація:
Saab Surveillance in Järfä̈lla constructs complex products, such as radars and electronic support measures. Saab sees an advantage in manufacturing details with additive manufacturing as it enables a high level of complexity. Additive manufacturing is relatively new in the industry and consequently there are uncertainties regarding the process. The purpose of this bachelor thesis was to improve the knowledge of the repeatability of additive manufactured parts as well as compare additive manufactured test rods in two different directions, horizontally and vertically, to subtractive manufactured test rods with a vibration test. The vibration test was conducted to simulate the operative environment where the additive manufactured parts might be implemented in the future. Before the vibration test could be performed, the test rods were designed in a 3D-modeling program and analysed with a finite element method to achieve the required natural frequency range of 100 - 200 Hz and a maximal bending stress of 60 - 80 MPa in the notched area of the test rod. It was concluded that the subtractive manufactured test rods had the highest repeatability. The horizontally additive manufactured test rods had a higher repeatability than the vertically additive manufactured test rods, but the vertically additive manufactured test rods had the highest overall strength. It was also concluded that more studies are needed to ensure that additive manufactured parts can be produced with high repeatability while maintaining the structural integrity.
Saab Surveillance i Järfä̈lla konstruerar komplexa försvarsprodukter som till exempel radarsystem. Additiv tillverkning i metall möjliggör tillverkning av produkter med hög komplexitet, men då tillverkningsprocessen är relativt ny i industrin finns det en stor osäkerhet kring processen. Syftet med detta kandidatexamensarbete var att få en bättre förståelse för repeterbarheten hos additivt tillverkade delar samt att jämföra additivt tillverkade provstavar konstruerade i två olika riktningar, horisontellt och vertikalt, med svarvade provstavar med hjälp av ett vibrationstest. Vibrationstestet genomfördes för att simulera den operativa miljön där de additivt tillverkade detaljerna skulle kunna implementeras i framtiden. Innan vibrationstestet kunde utföras simulerades provstavarnas design i en mjukvara för 3D-modellering. En finit element-analys utfördes även fö̈r att få en egenfrekvens inom intervallet 100 - 200 Hz och en maximal böjspänning mellan 60 - 80 MPa i anvisningen på provstaven. Slutsatsen drogs att de traditionellt bearbetade stavarna hade den högsta repeterbarheten. De horisontellt additivt tillverkade stavarna hade högre repeterbarhet än de vertikalt additivt tillverkade stavarna, men att de vertikalt additivt tillverkade stavarna hade ett längre utmattningsliv. Det kunde även konstateras att fler studier inom ämnet behövs för att kunna säkerställa repeterbarheten hos additivt tillverkade delar utan att behöva kompromissa med hållfastheten.
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Книги з теми "Alloy additive"

1

Dunning, J. S. Effect of aluminum additives on sulfidation resistance of some Fe-Cr-Ni alloys. Washington, DC: Dept. of the Interior, 1989.

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Dunning, J. S. Effects of Al additions on sulfidation resistance of some Fe-Cr-Ni alloys. Washington, D.C: Bureau of Mines, U.S. Dept. of the Interior, 1989.

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3

Garga. Effect of Hf-rich particles on the creep life of a high-strength NiAl single crystal alloy. [Washington, D.C: National Aeronautics and Space Administration, 1995.

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4

Peter, Rudling, and Kammenzind Bruce, eds. Zirconium in the nuclear industry: Fourteenth international symposium. West Conshohocken, Pa: ASTM, 2006.

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5

K, Kokula Krshina Hari, ed. Effects of Combined Addition of Aluminum Oxide, Fly Ash, Carbon and Yttrium on Density and Hardness of ZA27 Zinc Alloy: ICIEMS 2014. India: Association of Scientists, Developers and Faculties, 2014.

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6

GOVERNMENT, US. An Act to Allow the National Park Service to Acquire Certain Land for Addition to the Wilderness Battlefield in Virginia, as Previously Authorized by Law, by Purchase or Exchange as Well as by Donation. [Washington, D.C: U.S. G.P.O., 1999.

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7

Petrantoni, Giuseppe. Corpus of Nabataean Aramaic-Greek Inscriptions. Venice: Fondazione Università Ca’ Foscari, 2021. http://dx.doi.org/10.30687/978-88-6969-507-0.

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Анотація:
The impact of the Hellenization in the Ancient Near East resulted in a notable presence of Greek koiné language and culture and in the interaction between Greek and Nabataean that conducted inhabitants to engrave inscriptions in public spaces using one of the two languages or both. In this questionably ‘diglossic’ situation, a significant number of Nabataean-Greek inscriptions emerged, showing that the koinŽ was employed by the Nabataeans as a sign of Hellenistic cultural affinity. This book offers a linguistic and philological analysis of fifty-one Nabataean-Greek epigraphic evidences existing in northern Arabia, Near East and Aegean Sea, dating from the first century BCE to the third-fourth century CE. This collection is an analysis of the linguistic contact between Nabataean and Greek in the light of the modalities of social, religious and linguistic exchanges. In addition, the investigation of onomastics (mainly the Nabataean names transcribed in Greek script) might allow us to know more about the Nabataean phonological system.
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8

Kuznecov, Sergey, and Konstantin Rogozin. All of physics on your palm. Interactive reference. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/501810.

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This is a unique visual book created by the best techniques of modern education. It presents the basic laws and formulas for all sections of physics with a huge number of interactive additions, explanations, illustrations, charts, graphs, tables, and drawings, allowing you to learn the material more efficiently. A clear and concise style of writing focuses the reader's attention in the target material, and numerous exercises, control questions and tasks allow you to securely fix in the memory the knowledge. Additional materials for all sections of General physics course available to You on the Internet in ABS Znanium.com. Using your mobile device, scan the QR code and get it on your smartphone or tablet access to comprehensive information throughout the course of physics in the media formats. In addition, on the YouTube channels "Salisylate and Isminimal from rocky" (from "the Russian Creative Internet") hosted a large number of additional training materials and videos used in this book. Interactive Handbook is intended for use in the educational activities of teachers and students of technical specialties of full-time and distance learning forms, as well as students of technical schools and secondary schools.
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9

Additive Manufacturing of Titanium Alloys. Elsevier, 2016. http://dx.doi.org/10.1016/c2015-0-02470-4.

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10

Additive Manufacturing (AM) of Metallic Alloys. MDPI, 2020. http://dx.doi.org/10.3390/books978-3-03943-141-0.

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Частини книг з теми "Alloy additive"

1

Yin, Shuo, and Rocco Lupoi. "Cold Sprayed Metallic Glass and High Entropy Alloy Deposits." In Springer Tracts in Additive Manufacturing, 153–65. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73367-4_8.

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2

Hoyer, K. P., and M. Schaper. "Alloy Design for Biomedical Applications in Additive Manufacturing." In TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings, 475–84. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05861-6_44.

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3

Sundarraj, Suresh, Sion Pickard, Alonso Peralta, Anil Chaudhary, David Snyder, Jeff W. Doak, Suraj Rawal, et al. "ICME Based Additive Manufacturing of Alloy 230 Components." In Proceedings of the 9th International Symposium on Superalloy 718 & Derivatives: Energy, Aerospace, and Industrial Applications, 133–46. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-89480-5_7.

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4

Mishra, Ashish Kumar, and Arvind Kumar. "Modelling of SLM Additive Manufacturing for Magnesium Alloy." In Lecture Notes on Multidisciplinary Industrial Engineering, 123–40. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8767-7_5.

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5

Giri, N., G. S. Brar, and A. S. Shahi. "Investigation of Mechanical Properties in Friction Stir Welded Mg AZ 31 Alloy Workpieces." In Additive, Subtractive, and Hybrid Technologies, 89–99. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99569-0_7.

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6

Sheridan, Luke, Bo Whip, and Joy Gockel. "Primary Processing Parameter Effects on Defects and Fatigue in Alloy 718." In Structural Integrity of Additive Manufactured Parts, 450–64. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2020. http://dx.doi.org/10.1520/stp162020180092.

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7

Sahu, Anshuman Kumar, and Siba Sankar Mahapatra. "Optimization of Electrical Discharge Machining of Titanium Alloy (Ti6Al4V) by Grey Relational Analysis Based Firefly Algorithm." In Additive Manufacturing of Emerging Materials, 29–53. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91713-9_2.

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8

Withers, J. C., R. O. Loutfy, and S. M. Pickard. "Additive Manufacturing to Produce Standard and Custom Alloy Titanium." In Proceedings of the 13th World Conference on Titanium, 1413–16. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119296126.ch238.

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Withers, James C., and Sion M. Pickard. "Additive Manufacturing to Produce Standard and Custom Alloy Titanium." In TMS 2017 146th Annual Meeting & Exhibition Supplemental Proceedings, 81–89. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51493-2_9.

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10

Sadeghimeresht, Esmaeil, Paria Karimi, Pimin Zhang, Ru Peng, Joel Andersson, Lars Pejryd, and Shrikant Joshi. "Isothermal Oxidation Behavior of EBM-Additive Manufactured Alloy 718." In Proceedings of the 9th International Symposium on Superalloy 718 & Derivatives: Energy, Aerospace, and Industrial Applications, 219–40. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-89480-5_13.

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Тези доповідей конференцій з теми "Alloy additive"

1

Shuai, Li, Wei Qingsong, D. Q. Zhang, and Chua Chee Kai. "Microstructures and Texture of Inconel 718 Alloy Fabricated by Selective Laser Melting." In 1st International Conference on Progress in Additive Manufacturing. Singapore: Research Publishing Services, 2014. http://dx.doi.org/10.3850/978-981-09-0446-3_021.

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2

WĘGLOWSKI, Marek Stanisław, Sylwester BŁACHA, Krzysztof KWIECIŃSKI, Piotr ŚLIWIŃSKI, Jan DUTKIEWICZ, and Łukasz ROGAL. "electron beam additive manufacturing of Ni-Ti alloy." In METAL 2020. TANGER Ltd., 2020. http://dx.doi.org/10.37904/metal.2020.3619.

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3

Loh, L. E., C. K. Chua, Z. H. Liu, D. Q. Zhang, S. L. Sing, and M. Mapar. "A Numerical Study on the Melt Track in Selective Laser Melting Using Aluminium Alloy 6061." In 1st International Conference on Progress in Additive Manufacturing. Singapore: Research Publishing Services, 2014. http://dx.doi.org/10.3850/978-981-09-0446-3_028.

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4

Zhang, Wenjing, Ning Wang, Tao Hang, and Ming Li. "Electroless deposition of copper alloy in the PEG additive." In 2015 16th International Conference on Electronic Packaging Technology (ICEPT). IEEE, 2015. http://dx.doi.org/10.1109/icept.2015.7236832.

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5

Mireles, Omar, Omar Rodriguez, Youping Gao, and Noah Philips. "Additive Manufacture of Refractory Alloy C103 for Propulsion Applications." In AIAA Propulsion and Energy 2020 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2020. http://dx.doi.org/10.2514/6.2020-3500.

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6

Sartor, Tiago, Jorge Vicente Lopes Da Silva, Reyolando Lopes Rebello Da Fonseca Brasil, and Rafael Celeghini Santiago. "Characterization of Titanium Alloy (Ti6Al4V) Obtained by Additive Manufacturing." In 2019 SAE Brasil Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2020. http://dx.doi.org/10.4271/2019-36-0112.

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7

Gaur, Bhanupratap, Rupesh Ghyar, and Bhallamudi Ravi. "Additive Manufacturing Process Parameter Optimization for Titanium-Alloy Orthopedic Implants." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-70436.

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Abstract Orthopedic implants are widely used for treating bone tumors and trauma defects in patients. The complex and organic geometry of patient-customized implants (PCIs) required in single order quantity makes them suitable for fabrication using additive manufacturing technologies such as Laser beam powder bed fusion. While there is considerable technical literature on these technologies, the choice of optimal process parameters to obtain the required quality considering the relevant applicable international quality standards for orthopedic implants is still a major challenge for the manufacturers. This experimental work relies on the minimum requirements of various mechanical properties recommended by ASTM F3001-14 and ASTM F136-13 standards for determining the optimal process parameters for PCI manufacture. Ti6Al4V ELI (Titanium–6Aluminum–4Vanadium Extra-Low-Interstitial) alloy test samples were fabricated using a Direct Metal Laser Sintering (DMLS) system. The three most critical printing parameters, namely, laser power, laser velocity and hatch distance, were varied in three levels using the Taguchi approach. Properties such as ultimate tensile strength, percentage elongation and part density were considered for optimizing the process parameter combinations using VIKOR, a multi-criteria decision-making technique. The results show that a combination of moderate laser power, high laser velocity and low hatch distance values produce implants with superior mechanical properties. The proposed methodology and results are expected to help researchers and manufacturers in choosing the initial process parameters for PCI fabrication.
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8

Rawal, Suraj, James Brantley, and Nafiz Karabudak. "Additive manufacturing of Ti-6Al-4V alloy components for spacecraft applications." In 2013 6th International Conference on Recent Advances in Space Technologies (RAST). IEEE, 2013. http://dx.doi.org/10.1109/rast.2013.6581260.

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9

Guo, Xuejia, Shengye Huang, Ping Song, Yiming Li, Junhao Liu, and Meihong Guo. "Additive manufacturing of copper alloy and its application in Munroe effects." In Conference on Advanced Laser Technology and Application, edited by Pu Zhou, Xuechun Lin, Yangjian Cai, Yongzhen Huang, Jian Zhang, Cunlin Zhang, Zhiyi Wei, et al. SPIE, 2020. http://dx.doi.org/10.1117/12.2580011.

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10

Deutchman, H., M. Enright, J. Gong, J. McFarland, J. Neumann, G. Olson, A. Peralta, J. Sebastian, and D. Snyder. "Integrated Thermal Process Optimization of Alloy 718Plus® for Additive Manufacturing." In Superalloys 2016. The Minerals, Metals & Materials Society, 2016. http://dx.doi.org/10.7449/superalloys/2016/superalloys_2016_1031_1040.

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Звіти організацій з теми "Alloy additive"

1

Wu, A. S., G. F. Gallegos, M. W. Wraith, S. C. Burke, J. W. Elmer, D. W. Brown, B. Clausen, et al. Additive Manufacturing of a y0-Tetragonal Uranium-Niobium Alloy. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1466113.

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2

Allen, Jeffrey, Robert Moser, Zackery McClelland, Md Mohaiminul Islam, and Ling Liu. Phase-field modeling of nonequilibrium solidification processes in additive manufacturing. Engineer Research and Development Center (U.S.), December 2021. http://dx.doi.org/10.21079/11681/42605.

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Анотація:
This project models dendrite growth during nonequilibrium solidification of binary alloys using the phase-field method (PFM). Understanding the dendrite formation processes is important because the microstructural features directly influence mechanical properties of the produced parts. An improved understanding of dendrite formation may inform design protocols to achieve optimized process parameters for controlled microstructures and enhanced properties of materials. To this end, this work implements a phase-field model to simulate directional solidification of binary alloys. For applications involving strong nonequilibrium effects, a modified antitrapping current model is incorporated to help eject solute into the liquid phase based on experimentally calibrated, velocity-dependent partitioning coefficient. Investigated allow systems include SCN, Si-As, and Ni-Nb. The SCN alloy is chosen to verify the computational method, and the other two are selected for a parametric study due to their different diffusion properties. The modified antitrapping current model is compared with the classical model in terms of predicted dendrite profiles, tip undercooling, and tip velocity. Solidification parameters—the cooling rate and the strength of anisotropy—are studied to reveal their influences on dendrite growth. Computational results demonstrate effectiveness of the PFM and the modified antitrapping current model in simulating rapid solidification with strong nonequilibrium at the interface.
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3

Rodriguez, Salvador, Andrew Kustas, and Graham Monroe. Metal Alloy and RHEA Additive Manufacturing for Nuclear Energy and Aerospace Applications. Office of Scientific and Technical Information (OSTI), July 2020. http://dx.doi.org/10.2172/1644167.

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4

Matthes, Melissa. CHARACTERIZATION OF IMPACT PROPERTIES OF FORGED, LAYERED, AND ADDITIVE MANUFACTURED TITANIUM ALLOY. Office of Scientific and Technical Information (OSTI), August 2016. http://dx.doi.org/10.2172/1755201.

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5

Anderson, Iver, and John Siemon. Specific Adaptation of Gas Atomization Processing for Al-Based Alloy Powder for Additive Manufacturing. Office of Scientific and Technical Information (OSTI), June 2017. http://dx.doi.org/10.2172/1373366.

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Anderson, Iver, and John Siemon. Specific Adaptation of Gas Atomization Processing for Al-Based Alloy Powder for Additive Manufacturing. Office of Scientific and Technical Information (OSTI), June 2017. http://dx.doi.org/10.2172/1415042.

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7

Slotwinski, John A., William E. Luecke, Eric A. Lass, and Antonio Possolo. Interlaboratory mechanical-property study for Cobalt-Chromium alloy made by laser powder-bed-fusion additive manufacturing. Gaithersburg, MD: National Institute of Standards and Technology, August 2018. http://dx.doi.org/10.6028/nist.tn.2006.

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Sen-Britain, S. T., N. D. Keilbart, K. E. Kweon, T. A. Pham, C. A. Orme, B. C. Wood, and A. J. Nelson. Chapter 5. Characterization of Surface Oxide Chemistry of New and Recycled Ti-Al Alloy Powders used in Laser Powder Bed Fusion Additive Manufacturing. Office of Scientific and Technical Information (OSTI), July 2020. http://dx.doi.org/10.2172/1644249.

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Plotkowski, Alex, Fred List, III, Keith Carver, and Ryan Dehoff. Feedstock Modification for Enhanced Additive Alloys. Office of Scientific and Technical Information (OSTI), June 2020. http://dx.doi.org/10.2172/1764481.

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Li, Nan. Additive Manufacturing of Hierarchical Multi-Phase High-Entropy Alloys for Nuclear Component. Office of Scientific and Technical Information (OSTI), October 2017. http://dx.doi.org/10.2172/1398940.

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