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Zeitschriftenartikel zum Thema „Semi-solid phase“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Hu, Xiao Gang, Qiang Zhu, Helen V. Atkinson, Min Luo, Fan Zhang, and Wen Ying Qu. "Application of Multiphase Modelling in Semi-Solid Die Casting: Blister Prediction." Solid State Phenomena 256 (September 2016): 139–45. http://dx.doi.org/10.4028/www.scientific.net/ssp.256.139.

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One-phase modelling is widely used as an optimization and design tool for semi-solid casting process. By this approach, semi-solid alloy is taken as a homogeneous fluid and flow behaviours are represented by using the rheological properties of the mixture. A single set of conservation equations is solved to simulate the mould filling, without considering the different motilities between the liquid and the solid phase. Therefore, defects due to phase segregation cannot be predicted and particle tracking cannot be carried out. This study is focused on multiphase (i.e. a liquid-particle-air syste

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2

Uhlén, Mathias, Thomas Hultman, Johan Wahlberg, et al. "Semi-automated solid-phase DNA sequencing." Trends in Biotechnology 10 (1992): 52–55. http://dx.doi.org/10.1016/0167-7799(92)90169-v.

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3

Liu, Zhao Ming, Xin Wang, Ying Bo Zhang, and Hong Gao. "Effects of Semi-Solid Isothermal Treatments on Microstructures of Quasicrystal Reinforced AZ91 Alloys." Advanced Materials Research 430-432 (January 2012): 551–55. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.551.

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The as-cast and semi-solid microstructures of quasicrystal reinforced AZ91 alloys were investigated. The results show that the main phases of as-cast AZ91ZY1 and AZ91ZY2 alloys are all α-Mg, I-phase, Mg17Al12 and Al2Y phase. The grain boundary phases contents increase with increasing Y and Zn contents. The better semi-solid processing technological parameters of AZ91ZY1 and AZ91ZY2 alloys are 580 °C, 30 min and 560 °C, 30 min respectively. The better semi-solid processing temperature of AZ91ZY2 alloy is lower than the one of AZ91ZY1 alloy is mainly attributed to the higher contents of the grai

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4

Liu, Zheng, and Xiao Mei Liu. "Study on Fractal Characteristics of Primary Phase Morphology in Semi-Solid A356 Alloy." Advanced Materials Research 139-141 (October 2010): 653–56. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.653.

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Semi-solid A356 slurry was prepared by compound process, and the fractal characteristic of primary phase morphology was researched. The fractal dimensions of primary phase morphology in semi-solid A356 alloy were calculated by the calculating program written to calculate the fractal dimensions of box-counting in the imagine of morphology of semi-solid primary phase in A356 alloy. The results indicated that the primary phase morphology in semi-solid A356 prepared by compound process is characterized by fractal dimension, and the primary phase morphology prepared by the different technology para

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5

Li, Nai Yong, Han Xiao, Chi Xiong, De Hong Lu, and Rong Feng Zhou. "Microstructure of Semi-Solid Extruded Copper Alloy after Heat Treatment." Solid State Phenomena 285 (January 2019): 146–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.285.146.

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The semi-solid extruded ZCuSn10P1 copper alloy were annealed at different temperatures and time. The influences of heat treatment temperature and holding time on the microstructure of semi-solid ZCuSn10P1 copper alloy were investigated. The results show that with the increase of heat treatment temperature, the morphology of the semi-solid microstructure was improved, the sharp angle around the primary phase α-Cu and the liquid droplets were reduced. With the increase of heat treatment time, the solid-liquid segregation of the semi-solid structure was improved. The average grain size of the sol

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Kang, Suk Won, Dock Young Lee, and Ki Bae Kim. "Effect of Isothermal Holding Temperature on Globularization of Primary Solid Phase in Multiplex-Type Slurry Cup." Solid State Phenomena 116-117 (October 2006): 239–42. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.239.

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In order to produce a high quality and cost effective part in the rheocasting process for an automobile industry it has been important to develop a slurry-on-demand process, which can manufacture the semi-solid slurry having a fine and globular structure of primary solid phase. The morphology of primary solid phase of semi-solid slurry is coarsened and globularized during an isothermal holding process in a solid-liquid region. Accordingly, in this paper, the microstructural evolution of semi-solid slurry during the isothermal holding at a various temperature in solid-liquid region was investig

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Murakami, Yuichiro, та Naoki Omura. "Control of Amount of α-Al Phase Particles in near Eutectic Al-Si Alloy by Electromagnetic Stirring". Solid State Phenomena 327 (10 січня 2022): 250–54. http://dx.doi.org/10.4028/www.scientific.net/ssp.327.250.

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Al-Si alloy is widely used as a casting alloy. The α-Al phase in the semi-solid state has low Si content in the Al-Si alloy. Then by separation of these α-Al phases from semi-solid Al-Si alloy, refining of aluminum can be possible. But, in near eutectic Al-Si alloy, few primary α-Al phases can be crystallized. If the fraction ratio of the α-Al phase can be increased, near eutectic Al-Si alloy can refine, and this method can be used for recycling. In this study, the effect of electromagnetic stirring (EMS) on the microstructure, especially the amount of the α-Al phase particles was investigated

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Li, Zhong, Xiao Gang Hu, Hong Xing Lu, and Qiang Zhu. "Microstructure Design of Semi-Solid Slurry for Metal Direct Writing." Solid State Phenomena 348 (August 28, 2023): 33–38. http://dx.doi.org/10.4028/p-qdk1x5.

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Metal direct writing in semi-solid slurry is an innovative technology to realize low-cost printing of load-bearing parts in contrast to laser-based additive manufacturing. However, it is challenging to achieve near net-forming of 3D parts in the current stage because of the out of controlled microstructure and hence the unstable macro extrusion of the used semi-solid slurry. Here, mixed powder remelting (MPR) is introduced to actively design the characteristics of solid phases, i.e., solid fraction, shape factor, and size distribution. Specifically, high-melting-point pure Al powder served as

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Wang, Jia, De Hong Lu, Han Xiao, Rong Feng Zhou, Rong Zhou, and Long Biao Wu. "Effect of Rolling-Remelting SIMA Process on Semi-Solid Microstructure of ZCuSn10 Alloy." Solid State Phenomena 217-218 (September 2014): 418–25. http://dx.doi.org/10.4028/www.scientific.net/ssp.217-218.418.

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Semi-solid billet of ZCuSn10 (Wt%: 88.25Cu, 10.48Sn) alloy is prepared by strain induced melt activated (SIMA) method which including rolling and remelting process. Firstly, ZCuSn10 alloy is casted, and rolling samples are cut from ingot casting. Secondly, the rolling samples are two pass or four pass rolled after holding 15 minutes at 450°C, then samples with 10% and 20% pre-deformation degree are obtained. The remelting samples are cut from pre-deformed samples. Lastly, the remelting samples are reheated up to 850°C or 875°C, water quenching after holding for 15 minutes. Then semi-solid micr

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Yamanaka, N., S. Sakane, and T. Takaki. "Multi-phase-field lattice Boltzmann simulations of semi-solid simple shear deformation in thin film." Journal of Physics: Conference Series 2766, no. 1 (2024): 012195. http://dx.doi.org/10.1088/1742-6596/2766/1/012195.

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Abstract Semi-solid deformation during casting often results in significant solidification defects, such as segregation bands. Consequently, the development of a numerical simulation tool is crucial for accurately replicating semi-solid deformation. In our previous study, we applied a multi-phase-field lattice Boltzmann (MPF-LB) model to semi-solid deformation, facilitating seamless simulation from polycrystalline solidification to semi-solid deformation in a two-dimensional (2D) problem. This study extends the 2D MPF-LB model to a three-dimensional (3D) problem and develops a simulation metho

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Yamanaka, N., S. Sakane, and T. Takaki. "2D multi-phase-field lattice Boltzmann simulations of semi-solid shear deformation." IOP Conference Series: Materials Science and Engineering 1274, no. 1 (2023): 012045. http://dx.doi.org/10.1088/1757-899x/1274/1/012045.

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Abstract The deformation of solid–liquid coexistence regions strongly affects the formation of solidification defects in casting applications. Thus, understanding the mechanism of semi-solid deformation is crucial. This study used the multi-phase-field lattice Boltzmann model (MPF-LBM), which can simulate polycrystalline solidification with solid motion and liquid flow, to simulate two-dimensional semi-solid shear deformation with various grain shapes and solid fractions. It was concluded that the MPF-LBM could express the characteristic behaviors of semi-solid deformation, such as the Reynold

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Ji, Shouxun, Kai Wang, and Xixi Dong. "An Overview on the Process Development and the Formation of Non-Dendritic Microstructure in Semi-Solid Processing of Metallic Materials." Crystals 12, no. 8 (2022): 1044. http://dx.doi.org/10.3390/cryst12081044.

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Semi-solid metal (SSM) processing has been an attractive method for manufacturing near-net-shape components with high integrity due to its distinct advantages over conventional forming technologies. SSM processing employs a mixture of solid phase and liquid metal slurries and/or non-dendritic feedstocks as starting materials for shaping. Since the original development from 1970s, a number of SSM processes have been developed for shaping components using the unique rheological and/or thixotropic properties of metal alloys in the semi-solid state, in which the globular solid particles of primary

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13

Yang, Xiang Jie, Ming Wang, Liang Sheng Ding, Hong Min Guo, and Xu Bo Liu. "Squeeze Casting of Semi-Solid A356 Alloy." Solid State Phenomena 217-218 (September 2014): 436–41. http://dx.doi.org/10.4028/www.scientific.net/ssp.217-218.436.

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the rheo-squeeze casting (Rheo-SQC) combining the rheocasting and the SQC was developed, in which semi-solid slurry was produced by the low superheat pouring with a shearing field (LSPSF) process. The three dimensional morphology of the primary α-Al phase and the rest spacing of slurry prepared by LSPSF process have been reconstructed and visualized, and the microstructures of squeeze cast A356 alloy have been obtained. Based on the three dimensional microstructure reconstructed, their three dimensional characterizations such as solid volume fraction, equivalent diameter of the extracted prima

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14

Zhao, Hong Jin, Yong Lin Kang, Zhao Hui Wang, and Hai Liang Du. "Effect of Disturbing Conditions in Semi-Solid State on Microstructure Evolution of Magnesium Alloy." Solid State Phenomena 116-117 (October 2006): 296–99. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.296.

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In this paper the microstructure evolution of AZ91HP magnesium alloy casts produced under different disturbing treatment conditions such as non-disturbing, argon blowing and mechanical stirring in semi-solid state after holding a short time was studied. The results show that the grains of AZ91HP alloy casts refined, the secondary dendritic arms grown and the dendrites tend to rosette shape with the decrease of holding temperature. External disturbance can accelerate the evolution process, and the spherical primary α phase formed easily under mechanical stirring treatment condition. The formati

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Peter, Ildiko, Christian Castella, and Mario Rosso. "The Role of Liquid Phase in SSM Processes." Materials Science Forum 884 (January 2017): 93–114. http://dx.doi.org/10.4028/www.scientific.net/msf.884.93.

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The present chapter reports a short history and a state-of-the art of semi-solid techniques, with particular emphasis to the role of the liquid-solid fraction, being the rheological behaviour of the semi-solid slurry crucial and fundamental. The general description, with the related theoretical fundaments, is based on the data available in the recent and the past literature and finally it is integrated with some experimental results of the research carried out by the authors.

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Pineau, Frédéric, and Geneviève Simard. "Investigation of the Primary Phase Segregation during the Filling of an Industrial Mold with Semi-Solid A357 Aluminum." Solid State Phenomena 141-143 (July 2008): 635–40. http://dx.doi.org/10.4028/www.scientific.net/ssp.141-143.635.

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Casting metal alloys in the semi-solid state is now becoming a well established manufacturing technique. But, the success of this technology necessitates a good understanding of the feedstock material behaviour. To obtain high quality components with semi-solid metal processing, a homogeneous distribution of phases must be maintained in the material during the die filling stage. Many parameters affect the process such as temperature, time and stress history, which influence the shape, size and connectivity of the particles that make up the slurry. The subsequent phase interaction mechanisms ar

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Koeune, R., and Jean Philippe Ponthot. "A One Phase Thermomechanical Model for Semi-Solid Thixoforming." Solid State Phenomena 141-143 (July 2008): 629–35. http://dx.doi.org/10.4028/www.scientific.net/ssp.141-143.629.

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In order to model thixoforming processes, previous papers presented a thermomechanical one-phase modelling. This first version of constitutive model revealed several limitations: the model could not degenerate properly to pure solid or liquid behaviour neither to free solid suspensions. The aim of this paper was to propose solutions to overcome these limitations.

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Krchňák, Viktor. "Semi-automated high throughput combinatorial solid-phase organic synthesis." Biotechnology and Bioengineering 61, no. 3 (1999): 135–41. http://dx.doi.org/10.1002/(sici)1097-0290(1998)61:3<135::aid-cc1>3.0.co;2-s.

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19

Son, Yong Guk, Sung Soo Jung, Yong Ho Park, and Young Cheol Lee. "Effect of Semi-Solid Processing on the Microstructure and Mechanical Properties of Aluminum Alloy Chips with Eutectic Mg2Si Intermetallics." Metals 11, no. 9 (2021): 1414. http://dx.doi.org/10.3390/met11091414.

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This study reports the microstructural changes and mechanical properties of high-strength aluminum alloy chips prepared in the semi-solid state at different temperatures, pressures, and holding times. In semi-solid processes, these processing parameters must be optimized because they affect the microstructure and mechanical properties of the chips. In microstructural analysis, these parameters clearly influenced the spheroidization of the aluminum matrix. The aluminum matrix was uniformly spheroidized after semi-solid processing, and the densities of the final samples increased with the holdin

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Chen, Juan, Xiao Gang Hu, Wen Ying Qu та ін. "Preparation of Semi-Solid 357.0 Slurries with Different α-Al Phase Features by Solidification from Full Liquid State and Remelting". Solid State Phenomena 327 (10 січня 2022): 223–30. http://dx.doi.org/10.4028/www.scientific.net/ssp.327.223.

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The characteristics of the solid phase, namely the volume fraction, particle size, and morphology, are dominant variables that can determine the viscosity of the semi-solid slurry. However, particle size and morphology were always being ignored and the solid fraction was simply determined using the temperature in the conventional power-law viscosity, resulting in a disagreement in the viscosity values in different researches. To make the power-law viscosity model more accurate for predicting the filling process of semi-solid die casting, it is essential to modify this viscosity model based on

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Kang, Suk Won, Dock Young Lee, and Ki Bae Kim. "Effect of Preheating Temperature of Multiplex-Type Slurry Cup on the Morphology of Primary Solid Phase of Semi-Solid Slurry." Solid State Phenomena 116-117 (October 2006): 332–35. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.332.

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Semi-solid slurry for a rheocasting process requires a fine and globular structure of primary solid phase. In the present study, in order to find an optimum preheating temperature of a multiplex-type slurry cup in the slurry maker that we recently developed for the rheocasting process, the semi-solid slurry was held for a various time of up to 60 min. in a multiplex-type slurry cup preheated at a different temperature. A size and morphology of primary solid phase of the semisolid slurry was measured and analyzed with the difference of the recorded cooling curve during the solidification with r

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Huang, Min Jie, Ju Fu Jiang, and Ying Wang. "Semi-Solid Deformation Behavior, Flow Stress Prediction and Deformed Microstructure of GH3536 Superalloy." Solid State Phenomena 347 (August 24, 2023): 147–55. http://dx.doi.org/10.4028/p-tm4nvf.

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In current work, the deformation behavior and deformed microstructures of GH3536 superalloy in semi-solid state were investigated, and the semi-solid flow stress was predicted by artificial neural network (ANN) model. The semi-solid compression deformation was carried out at 1320-1350 °C, and the solid deformation behavior at 1200 °C was tested for comparison. The peak stress under 0.01-1 s-1 semi-solid deformation was 45.6-161.9 MPa. The peak stress decreased with the increase of deformation temperature and the decrease of strain rate. The ANN model could well describe semi-solid flow stress.

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Rong, Wenjuan, Zhongde Shan, Baoyu Wang, Yongwei Wang, and Jialin Wang. "Microstructure Evolution of 2A12 Aluminum Alloy under Isothermal Heat Treatment Direct Writing Process." Materials 15, no. 18 (2022): 6279. http://dx.doi.org/10.3390/ma15186279.

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A metal-melting direct writing process, using semi-solid isothermal heat treatment to form high-quality semi-solid components, realized the integrated innovation of semi-solid formation and additive manufacturing. An experimental study was carried out on semi-solid isothermal heat treatment for metal-melting direct-writing technology, using 2A12 aluminum alloy as raw material. The semi-solid isothermal heat treatment was carried out over different temperature ranges, and four-stages evolution mechanism of the semi-solid microstructure in the semi-solid melting direct writing process was invest

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Huang, Shuhui, Baohong Zhu, Yongan Zhang, Hongwei Liu, Shuaishuai Wu, and Haofeng Xie. "Microstructure Comparison for AlSn20Cu Antifriction Alloys Prepared by Semi-Continuous Casting, Semi-Solid Die Casting, and Spray Forming." Metals 12, no. 10 (2022): 1552. http://dx.doi.org/10.3390/met12101552.

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Antifriction alloys such as AlSn20Cu are key material options for sliding bearings used in machinery. Uniform distribution and a near-equiaxed granularity tin phase are generally considered to be ideal characteristics of an AlSn20Cu antifriction alloy, although these properties vary by fabrication method. In this study, to analyze the variation of the microstructure with the fabrication method, AlSn20Cu alloys are prepared by three methods: semi-continuous casting, semi-solid die casting, and spray forming. Bearing blanks are subsequently prepared from the fabricated alloys using different pro

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Wang, Yao, Yuanxing Li, Dengquan Han, Sifu Qiu, and Hui Chen. "Microstructure evolution and mechanical properties of 6N01S-T5 aluminum alloy joints with semi-solid solders by ultrasonic soldering." International Journal of Modern Physics B 33, no. 01n03 (2019): 1940027. http://dx.doi.org/10.1142/s0217979219400277.

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The article investigated the properties of 6N01 aluminum alloy joints with Sn-80Zn semi-solid solders by ultrasonic soldering. It was found that semi-solid solders consisted of Zn-rich phase with short rod-like dentrite, which had the lower solidus temperatures, while Zn-rich phase with long dentritic grains used the conventional solders. The joints soldered with Sn-80Zn conventional filler metal reached maximum shear strength of 73 MPa at the soldering temperature of 390[Formula: see text]C. The joint using Sn-80Zn semi-solid solder obtained higher shear strength of 90 MPa at the lower temper

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Zhang, Ying, Jin Hua Xu, Shui Sheng Xie, Mao Peng Geng, Hong Min Guo, and Hai Bo Zhao. "Effect of Annealing on Microstructure and Properties for Semi-Solid Magnesium Strips." Materials Science Forum 704-705 (December 2011): 581–85. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.581.

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The experiment of the roll-casting for semi-solid AZ91D magnesium was carried out on the equipment made by ourselves in our laboratory. Parameters of annealing process and the effect of annealing temperature on structure and hardness of semi-solid magnesium were investigated. It was shown that annealing process can improve the structure and properties of roll-casting strips for semi-solid magnesium. In addition, it can relieve the eutectic structure segregation and make β-Mg17Al12 phase precipitate from primary α-Mg grain, which can cause dispersion strengthening process when the annealing tem

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Kang, Suk Won, Dock Young Lee, and Ki Bae Kim. "Optimization of Manufacturing Conditions of Semi-Solid Slurry in Multiplex-Type Slurry Cup." Solid State Phenomena 116-117 (October 2006): 243–46. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.243.

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Recently, we have developed a slurry maker using a multiplex-type slurry cup for rheoforming process. In the present study, the optimum manufacturing condition of semi-solid slurry having a fine and globular structure of primary solid phase was investigated in the multiplextype slurry cup. A various manufacturing condition, such as a pouring temperature of melt, a preheating temperature of slurry cup, and a holding temperature and time of melt in slurry cup was varied to make a processing map of the semi-solid slurry for rheoforming process. Through the microstructural examination of primary s

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Shakiba, M., and Hossein Aashuri. "Modeling of Semi-Solid A356 Alloy under Upsetting Process." Solid State Phenomena 116-117 (October 2006): 622–25. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.622.

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The flow behavior of a semi-solid A356 alloy at high solid fraction was studied. The mushy zone was considered as an effective two-phase, so that the solid continuum can be compressible porous media, and the liquid phase interaction with the solid skeleton was of Darcy type. The semi-solid flow through the upsetting test was modeled in ABAQUS finite element method software. The Gurson yield criterion has been developed for the modeling process of the flow behavior of solid porous medium. Specimens were globulized by a thermomechanical process and then were tested for various percentages of ups

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Sun, Ting, Yong Jin Wang, Ren Bo Song, Ya Zheng Liu, Jun Yanagimoto, and Tom Taylor. "Phase Transformation of M2 High Speed Steel during Semi-Solid Cooling and Conventional Cooling." Solid State Phenomena 327 (January 10, 2022): 105–10. http://dx.doi.org/10.4028/www.scientific.net/ssp.327.105.

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In this paper, the fundamental microstructure evolution of M2 high speed steel was investigated during semi-solid controlled cooling and conventional cooling, respectively. Semi-solid controlled cooling was conducted at 1260 °C with cooling rates from 0.1 to 10 °C/s, while conventional cooling was conducted at 1200 °C and 890 °C with different cooling rates. The continuous cooling transformation curves were plot according to the microstructure evolution. The results showed that microstructure transformation behavior of cooling structure in semi-solid temperature range was different from that o

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Ma, Guorui, Chunchong Tang, Chunxia Wang, Yunqiu Yang, and Xuan Li. "Influences of Different Isothermal Temperatures on Microstructural Evolution of Mg₂Si/AZ91D Composite Fabricated by Semi-solid Treatment Process." Journal of Physics: Conference Series 2463, no. 1 (2023): 012036. http://dx.doi.org/10.1088/1742-6596/2463/1/012036.

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Abstract Due to the eutectic reaction, the Mg2Si phase is inclined to creating an unfavorable fishbone shape at low solidification rates. This can significantly degrade the mechanical characteristics and become the main barrier to the practical application of Mg2Si/AZ91D composites. It is regarded that semi-solid treatment process is an efficient technique to modulate the fishbone-shaped Mg2Si phases in Mg2Si/AZ91D composite. In this work, a new type of Mg2Si/AZ91D composite is successfully fabricated by semi-solid treatment process, and the influences of different isothermal temperatures on m

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Yi, Rong Xi, Shi Kun Xie, Xiao Qiu Zheng, and Yong Ping Ai. "Effect of RE on Performance of Semi-Solid AlSi7 Alloy." Key Engineering Materials 426-427 (January 2010): 581–84. http://dx.doi.org/10.4028/www.scientific.net/kem.426-427.581.

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The semi-solid slurry of AlSi7 alloy was prepared by near-liquids cast processing. The effects of different content of RE on the cast performance and the semi-solid remelting performance in AlSi7 alloy was researched. The results indicated that adding RE will widen the AlSi7 alloy solid-liquid two-phase zone temperature and refine the grains, silicon will obvious metamorphoses. The best amount of RE is about 0.5%. Its semi-solid remelting organization is equilateral globular grains.

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Kuwahara, Takashi, Taro Osaka, Mizuki Saito, and Shinsuke Suzuki. "Compressive Properties of A2024 Alloy Foam Fabricated through a Melt Route and a Semi-Solid Route." Metals 9, no. 2 (2019): 153. http://dx.doi.org/10.3390/met9020153.

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A2024 alloy foams were fabricated by two methods. In the first method, the melt was thickened by Mg, which acts as an alloying element (melt route). In the second method, the melt was thickened by using primary crystals at a semi-solid temperature with a solid fraction of 20% (semi-solid route). A2024 alloy foams fabricated through the semi-solid route had coarse and uneven pores. This led to slightly brittle fracture of the foams, which resulted in larger energy absorption efficiency than that of the foams fabricated through the melt route. Moreover, A2024 alloy foams fabricated through the s

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Guo, Hong Min, and Xiang Jie Yang. "Continuous Fabrication of Sound Semi-Solid Slurry for Rheoforming." Solid State Phenomena 116-117 (October 2006): 425–28. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.425.

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An alternative method has been proposed for the continuous and sample production of SSM slurry for the rheo-forming process. The process named “Low Superheat Pouring with a Shear Field (LSPSF)” dose not use the conventional stirring process, instead, it uses solidification conditions to control nucleation, nuclei survival and grain growth by means of low superheat pouring, vigorous mixing and rapid cooling during the initial stage of solidification combined with thereafter a much slower cooling. The method has been applied to A356, 201 and A380 Al-alloys. The primary phases present in average

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Seyboldt, Christoph, Mathias Liewald, and Daniel Heydt. "Production of Aluminium Based Interpenetrating Phase Composites Using Semi-Solid Forming." Key Engineering Materials 716 (October 2016): 502–9. http://dx.doi.org/10.4028/www.scientific.net/kem.716.502.

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The following paper deals with the production of Interpenetrating Phase Composites (IPC) using semi-solid forming technology. Therefore, adequate ceramic foams were selected and infiltrated by processing the aluminium alloy A356 in the semi-solid state. In the studies presented in this paper, the infiltrations of two ceramic materials (Al2O3 and SiC) with three different pore sizes (10, 20 and 30 ppi) were investigated. During the forming process the liquid phase fraction of the aluminium was varied to analyze infiltration effects in relation to the raw material´s liquid phase fraction. Afterw

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Hu, Yong Jun, Bin Qiang Zhong, Feng Li, et al. "Microstucture and Mechanical Properties of Semi-Solid Sn–58Bi Alloy." Key Engineering Materials 480-481 (June 2011): 687–90. http://dx.doi.org/10.4028/www.scientific.net/kem.480-481.687.

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Preparation of semi-solid Sn–58Bi alloys by mechanical stirring casting method was investigated. The effect of temperature below the melting temperature on the microstructures and mechanical properties of semi-solid Sn–58Bi alloys was discussed. The experimental results showed that long plate shape, block shape and suborbicular Sn phases were formed by mechanical agitation during the casting solidification process. The non-lamellar Sn-Bi Microstructure improves prominently the elongation of Sn-Bi alloy. The elongation of semi-solid Sn-Bi alloy with suborbicular Sn phase is enhanced up to 37% c

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Suéry, Michel, Luc Salvo, Charles Josserond, and Marco Di Michiel. "In-Situ 3D Investigation by Fast X-Ray Microtomography of the Microstructural Changes Occurring during Partial Remelting of Al-Cu Alloys." Solid State Phenomena 116-117 (October 2006): 231–34. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.231.

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The evolution of the microstructure of semi-solid Al-Cu alloys has been characterized during isothermal treatments in the semi-solid state by using in-situ X-ray microtomography experiments carried out at ESRF, Grenoble. This work is therefore a continuation of previous experiments reported at the 8th S2P Conference in Limassol. Quantitative data are presented dealing with changes with holding time of the solid volume fraction, of the solid-liquid interface area and of the mean and Gaussian curvatures of the solid phase. Discussion of the results is carried out on the basis of the mechanisms i

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Khunbanterng, Nisachon, Sirikul Wisutmethangoon, Thawatchai Plookphol, and Jessada Wannasin. "Effect of Sr Addition on Microstructure and Mechanical Properties of Semi-Solid 2024 Al Alloys." Applied Mechanics and Materials 496-500 (January 2014): 336–39. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.336.

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Semi-solid 2024 Al alloys with strontium (Sr) addition of 0.15 wt% and 0.3 wt% were prepared by Gas Induced Semi-Solid (GISS) process. Effect of Sr addition on the microstructure and mechanical properties of the semi-solid 2024 alloy was investigated. It was found that the tensile strength and % elongation of the T6 heat treated alloy with the Sr addition were higher than those without Sr addition owing to the reduction of Mg2Si phase formation. The semi-solid 2024 Al alloy with 0.15%Sr addition obtained the average highest tensile strength of 382 MPa and elongation of 6.45%.

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Kang, Suk Won, Ki Bae Kim, Dock Young Lee, Jung-Hwa Mun, and Eui Pak Yoon. "Effect of Pouring Temperature and Holding Time at Semi-Solid Region on the Morphology of Primary Solid Phase in Semi-Solid Slurry." Materials Science Forum 510-511 (March 2006): 782–85. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.782.

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Wang, Jiao Jiao, Qiang Zhu, Fan Zhang, Da Quan Li, and You Feng He. "Investigation on Liquid Segregation during Rheo-Casting Process Based on Eulerian-Granular Multiphase Model." Solid State Phenomena 256 (September 2016): 113–18. http://dx.doi.org/10.4028/www.scientific.net/ssp.256.113.

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A crucial problem concerned with the semi-solid forming process is the liquid segregation phenomena during shape formation, especially for rheo-casting process. Liquid segregation occurs due to the separation phenomena of the solid grain and the liquid phase. In this work, using commercial finite element software, the liquid segregation during rheo-casting process was numerically investigated by Eulerian-granular multiphase model based on the comparable results of single phase model, Eulerian-granular two-phase and three-phase model, along with Eulerian-granular DDPM three-phase model. In the

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Ma, Guo-Rui, Guo-Jie Xu, Chun-Xia Wang, Zhi-Ming Li, and Yun-Qiu Yang. "Study on the influences of different process temperatures on microstructural evolution of Mg-11%Al-2%Zn-1%Si alloy through isothermal semi-solid treatment." Journal of Physics: Conference Series 2539, no. 1 (2023): 012104. http://dx.doi.org/10.1088/1742-6596/2539/1/012104.

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Abstract Due to the eutectic reaction, the Mg2Si phase is inclined to creating an unfavorable fishbone shape at low solidification rates. This can significantly degrade the mechanical characteristics and become the main barrier to the practical application of Mg-Si based alloy. It is regarded that isothermal semi-solid treatment is an efficient technique to modulate the fishbone-shape eutectic Mg2Si phases in Mg-Si based alloys. In this work, a new type of Mg-11%Al-2%Zn-1%Si alloy is successfully fabricated through isothermal semi-solid treatment, and the influences of different process temper

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Guo, Hong Min, Le Rong Bai, Bin Liu, and Xiang Jie Yang. "Ti-Zr-V-Cu-Be BMGMCs Processed by Semi-Solid Processing." Solid State Phenomena 285 (January 2019): 111–14. http://dx.doi.org/10.4028/www.scientific.net/ssp.285.111.

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Compared with monolithic bulk-metallic glasses at room temperature, in-situ two-phase bulk metallic glass matrix composites (BMGMCs) exhibit improved toughness. However, most of in-situ BMGMCs are developed through extremely rapid cooling, during which the solidification process cannot be controlled effectively. As a consequence, the microstructures of in situ two-phase composites, even with the same composition, vary from one to another, highly depend on the cooling rate. In the present investigation, the Ti-Zr-V-Cu-Be BMGMCs was prepared by using copper mould suction process, and the evoluti

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Kim, Jeong Min, Bong Koo Park, Joong Hwan Jun, Ki Tae Kim, and Woon Jae Jung. "Microstructure and Mechanical Properties of Cast and Semi-Solid Formed Mg-Al-Zn Alloys." Solid State Phenomena 116-117 (October 2006): 288–91. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.288.

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Various Mg-Al-Zn alloys with different Al and Zn contents were fabricated by conventional casting and semi-solid forming process. And the microstructure and mechanical properties of the alloys were investigated. In Mg-4%Al-(5~7)%Zn alloys most of the grain boundary phases were found to be Mg-Al-Zn while in Mg-6%Al or Mg-8%Al based alloys the Mg- Al-Zn phase coexisted with Mg17Al12 at grain boundaries. At room temperature the semi-solid formed alloys showed significantly higher tensile properties, especially elongation, than the conventionally cast alloys.

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Chigome, Samuel, Godfred Darko, Ulrich Buttner, and Nelson Torto. "Semi-micro solid phase extraction with electrospun polystyrene fiber disks." Analytical Methods 2, no. 6 (2010): 623. http://dx.doi.org/10.1039/c0ay00092b.

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44

Li, Jiqiang, Lei Zhang, Xuan Pu Dong, Wen Liu, and Zhao Zhang. "Study on Microstructure of Semi-Solid Magnesium Alloy Manufactured by Gas Bubbles Stirring." Advanced Materials Research 129-131 (August 2010): 728–32. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.728.

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The semi-solid slurry of AZ31 magnesium alloy was manufactured by gas bubbles stirring. The effects of stirring temperature and stirring time on the microstructure of semi-solid slurry were researched. The results indicate that it is feasible to manufacture the slurry with particle-like primary phases. When the stirring temperature is higher, the morphology of the primary a-Mg presents rosette-like morphology and the size of grain is coarse, and the morphology mainly was α- Mg dendrite at lower stirring temperature. Long stirring time could reduce dendrites and liquid phase, and made the non-d

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Behúlová, Mária, David Aišman, Hana Jirková, and Bohuslav Mašek. "Experimental and Numerical Investigation of the Steel X210Cr12 Forming in Semi-Solid State." Advanced Materials Research 214 (February 2011): 461–66. http://dx.doi.org/10.4028/www.scientific.net/amr.214.461.

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Semi-solid forming processes belong to the progressive technologies which can be exploited for the manufacturing products with complicated shapes and special material and utility properties. Semi-solid metal forming takes place at temperatures between solidus and liquidus combining the advantages of metal forging and metal casting processes. The paper is focused on the analysis of microstructures and phase composition of the X210Cr12 steel identified in the thin-walled products after forming in semi-solid state. Microstructure of the X210Cr12 steel after rapid cooling and solidification from s

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Wu, Shu Sen, Xiao Gang Fang, Shu Lin Lü, Li Zhao, and Jing Wang. "Semi-Solid Processing and Properties of RE-Containing Mg Alloys." Solid State Phenomena 256 (September 2016): 75–80. http://dx.doi.org/10.4028/www.scientific.net/ssp.256.75.

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The RE-containing Mg alloys usually have big RE-rich intermetallic compounds distributed along grain boundaries. In this paper, a 3 wt.% RE containing Mg alloy is processed by combination of semi-solid slurry-making with ultrasonic vibration (UV) and squeeze casting. Results show that good semi-solid slurry with fine and spherical primary α-Mg particles can be obtained due to the effects of the cavitation and acoustic streaming induced by UV, and the average particle size and average shape factor are about 30 μm and 0.70 respectively. The RE-rich intermetallic compounds are refined and uniform

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47

Gu, Guochao, Lixin Xiang, Ruifen Li, Wenhua Xu, Yupeng Lu, and Raphaël Pesci. "Effects of Process Parameters on Microstructure and Mechanical Properties of Semi-Solid Al-7Si-0.5Mg Aluminum Alloy by Gas Induced Semi-Solid Process." Metals 12, no. 10 (2022): 1600. http://dx.doi.org/10.3390/met12101600.

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Al-7Si-0.5Mg aluminum alloy semi-solid slurry with good spherical grains was prepared by gas induced semi-solid process (GISS) and the effects of both holding time and medium alloy addition on the microstructure of the semi-solid slurry were investigated. These two parameters have a great influence on the solid fraction, the size and the sphericity of the grains. With holding time increased from 85 s to 270 s, the solid phase fraction of the semi-solid slurry decreased from ~0.77 to ~0.67, the average grain size increased from ~95 μm to ~225 μm and the average shape factor decreased from ~0.80

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Knauf, Frederik, I. Seidl, and Gerhard Hirt. "Rheoforging of Steel." Solid State Phenomena 116-117 (October 2006): 464–67. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.464.

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Rheoforging is a modification of semi-solid forging starting directly from the liquid phase instead of reheating of a billet. In this process semi-solid slurry is prepared by pouring slightly overheated melt over a slope into a holding cup to induce homogenous nucleation. By controlling the casting temperature and holding time in the cup the desired semi-solid slurry with fine, globular microstructure is successfully created. The inline forging trials using this slurry show the principal feasibility of the process.

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Jiang, Ruifen, Wei Lin, Lifang Zhang, Fang Zhu, and Gangfeng Ouyang. "Development of a novel solid phase microextraction calibration method for semi-solid tissue sampling." Science of The Total Environment 655 (March 2019): 174–80. http://dx.doi.org/10.1016/j.scitotenv.2018.11.226.

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50

Kang, Suk Won, Ki Bae Kim, Dock Young Lee, Jung-Hwa Mun, and Eui Pak Yoon. "Morphological Evolution of Primary Solid Phase in Semi-Solid Slurry during the Isothermal Holding." Materials Science Forum 510-511 (March 2006): 394–97. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.394.

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