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Academic literature on the topic 'Alloy composites'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Alloy composites"

1

Avinash, L., T. Ramprabhu, Adithya Parthasarathy, K. N. Varun Kumar, and Basavaraj Sajjan. "Wear and Mechanical Behaviour of Hypo-Eutectic Al-7%Si-0.5%Mg Alloy (A357) Reinforced with Al2O3 Particles." Applied Mechanics and Materials 829 (March 2016): 66–72. http://dx.doi.org/10.4028/www.scientific.net/amm.829.66.

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In this study, A357 (Al-7%Si-0.5%Mg) alloy/Al2O3 composites with various volume fractions (4%, 8%, 10%) were prepared by using permanent mould casting. In addition, A357 alloys were cast for comparison purposes. The alloys and composites were given a T6 heat treatment process (solution treatment and artificial ageing), Also microstructure, hardness and tensile properties of these composites were evaluated and compared. In addition, tribological properties of these composites were evaluated using a Pin-on-Disc apparatus at a constant sliding velocity of 1m/s and pressure of 0.35 MPa. The microstructure of the composites shows homogenous distribution of Al2O3 plate-like particles in the Al matrix except in the A357/10%Al2O3 composite. The wear and mechanical properties of composites improve with increasing the volume fraction of Al2O3 upto 8% and then decreases. Particularly, mechanical properties of the A357/10%Al2O3 composite are lower than the alloy indicating that the critical volume fraction of Al2O3 reinforcement in the A357 alloy is 8%. Wear morphology studies show that abrasive and delamination wear are extensive in the alloy whereas the slight delamination wear with some abrasive grooves are found in the composites.
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2

Jung, Beom-Seok, Jung-Pyo Kong, NingXue Li, Yoon-Mi Kim, Min-Saeng Kim, Sung-Hoon Ahn, and Maenghyo Cho. "Numerical simulation and verification of a curved morphing composite structure with embedded shape memory alloy wire actuators." Journal of Intelligent Material Systems and Structures 24, no. 1 (September 21, 2012): 89–98. http://dx.doi.org/10.1177/1045389x12459588.

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Shape memory alloys have been actively studied in various fields in an attempt to utilize their high energy density. In particular, shape memory alloy wire-embedded composites can be used as load-bearing smart actuators without any additional manipulation, in which they act like a hinge joint. A shape memory alloy wire-embedded composite is able to generate various deformation behaviors via the combination of its shape memory alloy and matrix materials. Accordingly, a study of the various design parameters of shape memory alloy wire-embedded composites is required to facilitate the practical application of smart structures. In this research, a numerical simulation of a shape memory alloy wire-embedded composite is used to investigate the deformation behavior of a composite panel as a function of the composite width per shape memory alloy wire, composite thickness, and the eccentricity of the shape memory alloy wire. A curved morphing composite structure is fabricated to confirm the results of the numerical simulation. The deformation of the shape memory alloy wire-embedded composite panel is determined by measuring its radius of curvature. The simulated deformation behaviors are verified with the experimental results. In addition, an analysis of the deformation and internal stress of the composites is carried out. It can be used to obtain guidelines for the mechanical design of shape memory alloy wire-embedded composite panels.
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Wilk, M. S., and R. E. Śliwa. "The Influence of Features of Aluminium Alloys 2024, 6061 and 7075 on the Properties of Glare-Type Composites / Wpływ Właściwości Stopów Aluminium 2024, 6061, 7075 Na Cechy Kompozytu Typu Glare." Archives of Metallurgy and Materials 60, no. 4 (December 1, 2015): 3101–8. http://dx.doi.org/10.1515/amm-2015-0496.

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The above paper presents the assumptions and results of the research whose aim was to determine the influence of 2024, 6061 and 7075 aluminum alloys on the final properties of GLARE-type composites. GLARE 3 2/1 type composites, made of two layers of the epoxy prepreg, reinforced with unidirectional glass fibers, arranged in the direction of 0°/90°, and two sheets of aluminum with a thickness of 0.4 mm, were investigated. Composites of various stacking configurations of alloy layers, made of one type of aluminum alloy (so-called ‘homogeneous composites’), and two different alloys (mixed composites), were analyzed. The properties of the composites were evaluated with the use of the mixing rule and compared with the test results. The influence of the used aluminum alloys on mechanical properties of GLARE-type composites has been determined. GLARE-type composite made of 7075 alloy sheets had the most favorable mechanical properties in comparison to properties of composites with 2024 and 6061 sheets. It has been shown how the properties of GLARE-type composites depend on the type of the aluminum alloy. It has been also proved that the properties of GLARE-type composites can be evaluated with the use of the mixing rule.
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Aishwarya, J., M. Nithin Kumaar, Vaira Vignesh Ramalingam, and M. Govindaraju. "Sandwich composite of aluminum alloy and magnesium alloy through accumulative roll bonding technique." Metallurgical and Materials Engineering 28, no. 2 (June 30, 2022): 257–68. http://dx.doi.org/10.30544/761.

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Aluminum and magnesium alloys are lightweight materials with outstanding technical uses. Due to their combined qualities, composites built of aluminum and magnesium alloys have surpassed the utilization of these elements individually. Accumulative Roll Bonding was used to create a three-layered sandwich composite structure made of Al-alloy/Mg-alloy/Al-alloy. The composite structure's microstructure and mechanical characteristics were studied. A fine-grained AZ31 layer was formed, according to the microstructural study. At the Al-alloy/Mg-alloy contact, a diffusion layer was also seen. On the broken surface, fractography exhibited both ductile and brittle failure characteristics.
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Hembrom, S., B. N. Roy, N. Khobragade, and D. Roy. "Studies on Amorphous Alloy Dispersed Aluminium Matrix Composite Prepared by High Pressure Torsion." Journal of Materials Science Research 5, no. 1 (December 29, 2015): 89. http://dx.doi.org/10.5539/jmsr.v5n1p89.

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<p class="1Body">Aluminium-based composite reinforced with Cu base amorphous alloy dispersed composite was prepared by means of high pressure torsion between a powder mix of aluminium and amorphous Cu base alloy. The X-ray diffraction pattern of powdered and consolidated composites shows the aluminium phase while the thermal stability of the amorphous alloy was studied with the aid of differential scanning calorimetry (DSC). The microstructural feature of the composite through scanning electron microscope reveals the well-distributed reinforcements in the host aluminium matrix. The hardness measurement on the as prepared composites shows significant increase in hardness with increase in reinforced amorphous alloy. Wear property of the synthesized composites were measured by using ball on plate wear tester which shows increase in wear resistance with increase in reinforced amorphous alloys.</p>
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Vignoli, Lucas L., Marcelo A. Savi, and Sami El-Borgi. "Nonlinear dynamics of earthquake-resistant structures using shape memory alloy composites." Journal of Intelligent Material Systems and Structures 31, no. 5 (January 13, 2020): 771–87. http://dx.doi.org/10.1177/1045389x19898269.

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Earthquake-resistant structures have been widely investigated in order to produce safe buildings designed to resist seismic activities. The remarkable properties of shape memory alloys, especially pseudoelastic effect, can be exploited in order to promote the essential energy dissipation necessary for earthquake-resistant structures. In this regard, shape memory alloy composite is an idea that can make this application feasible, using shape memory alloy fibers embedded in a matrix. This article investigates the use of shape memory alloy composites in a one-story frame structure subjected to earthquakes. Different kinds of composites are analyzed, comparing the influence of matrix type. Both linear elastic matrix and elastoplastic matrix with isotropic and kinematic hardening are investigated. Results indicate the great energy dissipation capability of shape memory alloy composites. A parametric analysis allows one to conclude that the maximum shape memory alloy volume fraction is not the optimum design condition for none of the cases studied, highlighting the necessity of a proper composite design. Despite the elastoplastic behavior of matrix also dissipates a considerable amount of energy, the associated residual strains are not desirable, showing the advantage of the use of shape memory alloys.
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Avinash, L., Hemanth Kumar, Adithya Parthasarathy, K. N. Varun Kumar, and Basavaraj Sajjan. "The Effect of Ceramic Reinforcement on the Microstructure, Mechanical Properties and Tribological Behavior of Al-7.5%Si-0.5%Mg Alloy." Applied Mechanics and Materials 867 (July 2017): 3–9. http://dx.doi.org/10.4028/www.scientific.net/amm.867.3.

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In this investigation, A357 (Al-7.5%Si-0.5%Mg) alloy/Al2O3 composites with various weight fractions (4%, 8%, 10%) were prepared by using permanent mould casting. In addition, A357 alloys were cast for comparison purposes. Microstructure, hardness and tensile properties of these composites were evaluated and compared with as-cast alloy. In addition, tribological properties of these composites were evaluated using a Pin-on-Disc apparatus at a constant sliding velocity of 1m/s and pressure of 0.35 MPa. The microstructure of the composites shows homogenous distribution of Al2O3 plate-like particles in the Al matrix except in the A357/10%Al2O3 composite. The wear and mechanical properties of composites improve with increasing the weight percentage of Al2O3 upto 8% and then decreases. Particularly, mechanical properties of the A357/10%Al2O3 composite are lower than the alloy indicating that the critical weight fraction of Al2O3 reinforcement in the A357 alloy is 8%. Wear morphology studies show that higher wear rate in case of unreinforced specimen was associated with higher thickness of hardened layer and consequent delamination of wear debris from the surface which was confirmed by optical and scanning electron micrography.Whereas ductile and brittle mode of fracture is observed in Fractographic observation of composite. The present paper highlights the salient features of casting technique and characterization of aluminum alloy A357 and alumina metal matrix composite.
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Rajaram, G., S. Kumaran, and T. Srinivas Rao. "Tensile Behaviour of Al-Si Alloy and Al-Si/Graphite Composites at Elevated Temperatures." Materials Science Forum 710 (January 2012): 457–62. http://dx.doi.org/10.4028/www.scientific.net/msf.710.457.

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The high temperature tensile behaviour of Al-Si alloy and two of its composite systems with graphite as major reinforcement were investigated. The composites were developed by the stir casting method, wherein a mixture of graphite (3 wt %) and Cu / Ni (2 wt% each) were added into the molten Al-Si alloy to fabricate two systems such as Al-Si-Cu/graphite composite and Al-Si-Ni/graphite composite. The properties of composites were better than that of the matrix alloy. Tensile behaviour of alloy and composites were studied at different temperatures from room temperature to 300°C. It is found that the tensile strength of the alloy and composites were decreasing with increase in temperature. The transition elements (Cu / Ni) have played the key role in improving the ultimate tensile and yield strength of the composites over the alloy. The flow stress of the composite is more than that of the alloy. The strain hardening exponent value continuously drops with the increase of tensile temperature due to the thermal softening effect. The % elongation of the alloy is more than that of the composites. Fracture surfaces of the samples are analyzed by scanning electron microscope to understand the fracture mechanisms. Fractography reveals that the fracture behaviour of the alloy changes from cleavage mode at room temperature to complete ductile mode at high temperature.
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Park, Won Jo, Hae Young Jung, Sun Chul Huh, Han Ki Yoon, and Kang Kil Lee. "The Strength and Hardness of Metal Matrix Composites by Binder Additives." Key Engineering Materials 297-300 (November 2005): 489–94. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.489.

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20 vol.% aluminum borate whisker (Al18B4O33w) reinforced AC4CH alloy composite was fabricated by squeeze casting method. The matrix is controlled its impurities, which make metal alloys, especially AC4CH alloy that is made by restraining 0.2% Iron and aluminum to make a matrix material. The perform of composite materials was made from Al18B4O33w with 5% regulated three kinds of inorganic binders, SiO2, Al2O3 and TiO2 sol, respectively and then sintered at 1373K. The composites were obtained by squeeze cast infiltration of the molten alloy to the perform. Then it was squeeze casting into the matrix. The status of adhesions of whisker perform was Observed by SEM. Micro-Vickers hardness and tensile properties at the room temperature were estimated. Al18B4O33w/ AC4CH composites containing TiO2 sol has excellent properties on tensile properties and microvickers hardness compared with the other composites without inorganic binder, containing SiO2 and Al2O3 sol inorganic binder.
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Liu, Bingfei, Qingfei Wang, Shilong Hu, Wei Zhang, and Chunzhi Du. "On thermomechanical behaviors of the functional graded shape memory alloy composite for jet engine chevron." Journal of Intelligent Material Systems and Structures 29, no. 14 (June 13, 2018): 2986–3005. http://dx.doi.org/10.1177/1045389x18781257.

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This study presents a theoretical work for a novel adaptive jet engine chevron concept based upon embedding the functionally graded shape memory alloy actuators in a composite laminate, termed a functionally graded shape memory alloy actuator composite. The constitutive models of the functionally graded shape memory alloy actuator composites including the monolayer shape memory alloy composites and multilayer shape memory alloy composites with different volume fractions of the shape memory alloy were first given. An example using such models was discussed on a published finite element work on a shape memory alloy hybrid composite jet engine chevron concept to prove the validity of the theoretical work. The thermomechanical behaviors of the functionally graded shape memory alloy actuator composite with different volume fractions of the shape memory alloy subjected to the thermal loading were then discussed using the obtained constitutive model. The tip deflections of the jet engine chevron with different embedding patterns of the shape memory alloy were finally obtained.
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Dissertations / Theses on the topic "Alloy composites"

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Matthews, Stephen John. "Cavitation erosion of aluminium alloys, aluminium alloy/ceramic composites and ceramics." Thesis, Coventry University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317927.

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Walker, John Christopher. "Lubricated sliding wear of some aluminium alloy composites." Thesis, University of Sheffield, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434551.

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Turner, Travis Lee. "Thermomechanical Response of Shape Memory Alloy Hybrid Composites." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/29771.

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This study examines the use of embedded shape memory alloy (SMA)actuators for adaptive control of the themomechanical response of composite structures. Control of static and dynamic responses are demonstrated including thermal buckling, thermal post-buckling, vibration, sonic fatigue, and acoustic transmission. A thermomechanical model is presented for analyzing such shape memory alloy hybrid composite (SMAHC) structures exposed to thermal and mechanical loads. Also presented are (1) fabrication procedures for SMAHC specimens, (2) characterization of the constituent materials for model quantification, (3) development of the test apparatus for conducting static and dynamic experiments on specimens with and without SMA, (4) discussion of the experimental results, and (5) validation of the analytical and numerical tools developed in the study. The constitutive model developed to describe the mechanics of a SMAHC lamina captures the material nonlinearity with temperature of the SMA and matrix material if necessary. It is in a form that is amenable to commercial finite element (FE) code implementation. The model is valid for constrained, restrained, or free recovery configurations with appropriate measurements of fundamental engineering properties. This constitutive model is used along with classical lamination theory and the FE method to formulate the equations of motion for panel-type structures subjected to steady-state thermal and dynamic mechanical loads. Mechanical loads that are considered include acoustic pressure, inertial (base acceleration), and concentrated forces. Four solution types are developed from the governing equations including thermal buckling, thermal post-buckling, dynamic response, and acoustic transmission/radiation. These solution procedures are compared with closed-form and/or other known solutions to benchmark the numerical tools developed in this study. Practical solutions for overcoming fabrication issues and obtaining repeatable specimens are demonstrated. Results from characterization of the SMA constituent are highlighted with regard to their impact on thermomechanical modeling. Results from static and dynamic tests on a SMAHC beam specimen are presented, which demonstrate the enormous control authority of the SMA actuators. Excellent agreement is achieved between the predicted and measured responses including thermal buckling, thermal post-buckling, and dynamic response due to inertial loading. The validated model and thermomechanical analysis tools are used to demonstrate a variety of static and dynamic response behaviors associated with SMAHC structures. Topics of discussion include the fundamental mechanics of SMAHC structures, control of static (thermal buckling and post-buckling) and dynamic responses (vibration, sonic fatigue, and acoustic transmission), and SMAHC design considerations for these applications. The dynamic response performance of a SMAHC panel specimen is compared to conventional response abatement approaches. SMAHCs are shown to have significant advantages for vibration, sonic fatigue, and noise control.
Ph. D.
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4

Coleman, Sarah L. "The corrosion of metal matrix composites." Thesis, University of Bath, 1991. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303434.

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Kang, Hyung-gu. "Locally reinforced squeeze cast aluminium alloy metal matrix composites." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294391.

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Jiang, Xia. "Development of Al alloy composites by powder metallurgy routes." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:ee89b51e-386d-48c8-8f45-161e94490fb6.

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Particulate reinforced Al alloy composites (AlMCs) are recognized as important structural materials due to their lightweight, high modulus and strength and high wear resistance. In order to understand the effect of matrix, reinforcement and secondary processing techniques on the microstructure development and mechanical properties of AlMCs produced by powder metallurgy routes, Al alloy composites reinforced with three types of reinforcements by different secondary processing techniques have been produced and examined. Fabrication of Al or 6061Al alloy based composites reinforced with nano-sized SiC particles (~500nm), micro-sized (<25µm) quasicrystalline alloy particles (hereinafter referred to as “NQX”) and micro-sized Nb particles (~130µm) has been carried out by powder metallurgy routes followed by extrusion or cold rolling. After extrusion, a homogeneous distribution of secondary particles has been obtained with rare interfacial reaction products. The 6061Al/SiC composites exhibit superior mechanical properties than either monolithic alloys or composites reinforced with micro-sized particles with retained ductility while the 6061Al/NQX and 6061Al/Nb composites show limited improvement in tensile strength mainly due to their reinforcement size and poor interfacial bonding. After cold rolling, the evolution in microstructure, texture and strength has been analysed. A typical near β fibre texture with highest intensities near Copper and Brass orientations has been developed for 6061Al/NQX and 6061Al/Nb composites. For 6061Al/SiC composites, a randomized texture with very small grains has achieved due to the presence of the non-deformable SiC particles. Mechanical property tests including microhardness, three-point bending tests and tensile tests have been carried out on cold rolled samples and the results exhibit some level of improvement when compared with as-extruded samples due to work hardening. Finally, the work moves on to the general discussion based on the previous result chapters. The microstructural development related to reinforcement, matrix and interfacial areas during extrusion and cold rolling has been summarised and the correlation between microstructure and mechanical properties has been discussed. The thesis provides a thorough understanding of AlMCs produced by powder metallurgy routes in terms of matrix, reinforcement and processing techniques. It can provide reference to the future development of AlMCs for high strength applications.
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Bawane, Kaustubh Krishna. "Silicon Carbide - Nanostructured Ferritic Alloy Composites for Nuclear Applications." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/96403.

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Silicon carbide and nanostructured ferritic alloy (SiC-NFA) composites have the potential to maintain the outstanding high temperature corrosion and irradiation resistance and enhance the mechanical integrity for nuclear cladding. However, the formation of detrimental silicide phases due to reaction between SiC and NFA remains a major challenge. By introducing a carbon interfacial barrier on NFA (C@NFA), SiC-C@NFA composites are investigated to reduce the reaction between SiC and NFA. In a similar way, the effect of chromium carbide (Cr3C2) interfacial barrier on SiC (Cr3C2@SiC) is also presented for Cr3C2@SiC-NFA composites. Both the coatings were successful in suppressing silicide formation. However, despite the presence of coatings, SiC was fully consumed during spark plasma sintering process. TEM and EBSD investigations revealed that spark plasma sintered SiC-C@NFA and Cr3C2@SiC-NFA formed varying amounts of different carbides such as (Fe,Cr)7C3, (Ti,W)C and graphite phases in their microstructure. Detailed microstructural examinations after long term thermal treatment at 1000oC on the microstructure of Cr3C2@SiC-NFA showed precipitation of new (Fe,Cr)7C3, (Ti,W)C carbides and also the growth of existing and new carbides. The results were successfully explained using ThermoCalc precipitation and coarsening simulations respectively. The oxidation resistance of 5, 15 and 25 vol% SiC@NFA and Cr3C2@SiC-NFA composites at 500-1000oC temperature under air+45%water vapor containing atmosphere is investigated. Oxidation temperature effects on surface morphologies, scale characteristics, and cross-sectional microstructures were investigated and analyzed using XRD and SEM. SiC-C@NFA showed reduced weight gain but also showed considerable internal oxidation. Cr3C2@SiC-NFA composites showed a reduction in weight gain with the increasing volume fraction of Cr3C2@SiC (5, 15 and 25) without any indication of internal oxidation in the microstructure. 25 vol% SiC-C@NFA and 25 vol% Cr3C2@SiC-NFA showed over 90% and 97% increase in oxidation resistance (in terms of weight gain) as compared to NFA. The results were explained using the fundamental understanding of the oxidation process and ThermoCalc/DICTRA simulations. Finally, the irradiation performance of SiC-C@NFA and Cr3C2@SiC-NFA composites was assessed in comparison with NFA using state-of-the-art TEM equipped with in-situ ion irradiation capability. Kr++ ions with 1 MeV energy was used for irradiation experiments. The effect of ion irradiation was recorded after particular dose levels (0-10 dpa) at 300oC and 450oC temperatures. NFA sample showed heavy dislocation damage at both 300oC and 450oC increasing gradually with dose levels (0-10 dpa). Cr3C2@SiC-NFA showed similar behavior as NFA at 300oC. However, at 450oC, Cr3C2@SiC-NFA showed remarkably low dislocation loop density and loop size as compared to NFA. At 300oC, microstructures of NFA and Cr3C2@SiC-NFA show predominantly 1/2<111> type dislocation loops. At 450oC, NFA showed predominantly <100> type loops, however, Cr3C2@SiC-NFA composite was still predominant in ½<111> loops. The possible reasons for this interesting behavior were discussed based on the large surface sink effects and enhanced interstitial-vacancy recombination at higher temperatures. The molecular dynamics simulations did not show considerable difference in formation energies of ½<111> and <100> loops for NFA and Cr3C2@SiC-NFA composites. The additional Si element in the SiC-NFA sample could have been an important factor in determining the dominant loop types. SiC-C@NFA composites showed heavy dislocation damage during irradiation at 300oC. At 450oC, SiC-C@NFA showed high dislocation damage in thicker regions. Thinner regions near the edge of TEM samples were largely free from dislocation loops. The precipitation and growth of new (Ti,W)C carbides were observed at 450oC with increasing irradiation dose. (Fe,Cr)7C3 precipitates were largely free from any dislocation damage. Some Kr bubbles were observed inside (Fe,Cr)7C3 precipitates and at the interface between α-ferrite matrix and carbides ((Fe,Cr)7C3, (Ti,W)C). The results were discussed using the fundamental understanding of irradiation and ThermoCalc simulations.
Doctor of Philosophy
With the United Nations describing climate change as 'the most systematic threat to humankind', there is a serious need to control the world's carbon emissions. The ever increasing global energy needs can be fulfilled by the development of clean energy technologies. Nuclear power is an attractive option as it can produce low cost electricity on a large scale with greenhouse gas emissions per kilowatt-hour equivalent to wind, hydropower and solar. The problem with nuclear power is its vulnerability to potentially disastrous accidents. Traditionally, fuel claddings, rods which encase nuclear fuel (e.g. UO2), are made using zirconium based alloys. Under 'loss of coolant accident (LOCA) scenarios' zirconium reacts with high temperature steam to produce large amounts of hydrogen which can explode. The risks associated with accidents can be greatly reduced by the development of new accident tolerant materials. Nanostructured ferritic alloys (NFA) and silicon carbide (SiC) are long considered are leading candidates for replacing zirconium alloys for fuel cladding applications. In this dissertation, a novel composite of SiC and NFA was fabricated using spark plasma sintering (SPS) technology. Chromium carbide (Cr3C2) and carbon (C) coatings were employed on SiC and NFA powder particles respectively to act as reaction barrier between SiC and NFA. Microstructural evolution after spark plasma sintering was studied using advanced characterization tools such as scanning electron microscopy (SEM), electron backscattered diffraction (EBSD), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) techniques. The results revealed that the Cr3C2 and C coatings successfully suppressed the formation of detrimental reaction products such as iron silicide. However, some reaction products such as (Fe,Cr)7C3 and (Ti,W)C carbides and graphite retained in the microstructure. This novel composite material was subjected to high temperature oxidation under a water vapor environment to study its performance under the simulated reactor environment. The degradation of the material due to high temperature irradiation was studied using state-of-the-art TEM equipped with in-situ ion irradiation capabilities. The results revealed excellent oxidation and irradiation resistance in SiC-NFA composites as compared to NFA. The results were discussed based on fundamental theories and thermodynamic simulations using ThermoCalc software. The findings of this dissertation imply a great potential for SiC-NFA based composites for future reactor material designs.
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8

Moon, Hee-Kyung. "Rheological behavior and microstructure of ceramic particulate/aluminum alloy composites." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/13638.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1990.
Vita.
Includes bibliographical references (leaves 221-229).
by Hee-Kyung Moon.
Ph.D.
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9

Zantout, B. "The production and evaluation of squeeze cast Al-alloy matrix-short ceramic fibre composites." Thesis, Loughborough University, 1986. https://dspace.lboro.ac.uk/2134/22082.

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Research work on metal matrix-fibre composites has concentrated in the past on aligned fibre composites. The poor transverse strength of these composites is seen as a major hindrance to their practical use in the majority of engineering applications because stresses exist in more than one direction. Materials with isotropic properties are preferred and consequently reinforcement of composites in three dimensions will be necessary. With this objective, an investigation was conducted to assess the method of fabrication and properties of A1-a110y reinforced with short fibres (SiC and A1 203) randomly oriented in three dimensions. Two composite systems were examined: Al-4.S Cu alloy reinforced with SiC fibre; and Al-3.7S Mg alloy reinforced with A1 203 fibre. The general approach was to establish a satisfactory manufacturing method for the composites before evaluating their mechanical properties. The vortex technique was used to introduce the fibres into the molten alloy. Pre-treatment of the fibres, to induce wetting, and the use of a specially designed device for fibre separation and introduction to the molten A1-ai10ys was found to be necessary so that a uniform distribution of fibres oriented in three dimensions could be achieved. The composites were squeeze cast, under conditions which were experimentally determined, to ensure the production of pore-free castings with fine equiaxed structures. The improvement in tensile strength and ductility of the cast metal, provided by squeeze casting, would be beneficial to composite properties. Composite castings, with up to 10% volume fibre, were produced with a sound structure and with fibres that were uniformly distributed and randomly oriented in three dimensions. It was found that the reaction between the fibres and the respective molten alloy must be closely controlled so that fibre reinforcement can be realised. In this respect the optimum time of contact between the fibres and the molten alloy was experimentally defined for both composite systems. The tensile properties (UTS, 0.1% proof stress, and ductility) of the fibre-free alloys were substantially improved by squeeze casting. The addition of fibre produced further substantial improvement in the tensile properties of the squeeze cast composites, in particular elastic modulus and 0.1% proof stress. Furthermore, composite properties were isotropic. The improvement in the tensile properties of composite castings (as a result of the addition of fibre) was maintained at elevated temperatures. At 250oC, castings of both composite systems with 10% (volume) fibre had 0.1% proof stress and elastic modulus values similar to those for the fibre-free castings at room temperature. The tensile properties of the composite castings were not affected by thermal cycling (at experimental conditions). The fatigue life of the squeeze cast composite was substantially improved over and above the initial improvement in fatigue life of the fibre-free castings produced by squeeze casting. Wear of cutting tools was adversely affected by the presence of fibres.
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10

Oguocha, Ikechukwuka N. A. "Characterization of aluminum alloy 2618 and its composites containing alumina particles." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0021/NQ37903.pdf.

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Books on the topic "Alloy composites"

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Ibbotson, Andrew Robert. Fatigue crack growth in continuous fibre reinforced titanium alloy matrix composites. Birmingham: University of Birmingham, 1994.

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Birman, V. Micromechanics of composites with shape memory alloy fibers in uniform thermal fields. [Washington, D.C.]: National Aeronautics and Space Administration, 1995.

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Buarzaiga, Mohamed M. Corrosion behavior of as-cast silicon carbide particulate/aluminum alloy metal-matrix composites. Ottawa: National Library of Canada, 1994.

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Nunez-Lopez, C. A. Corrosion behaviour of (SiC)p/ZC71 Mg alloy metal matrix composites in saline solutions. Manchester: UMIST, 1996.

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Kirkwood, David H. Semi-solid Processing of Alloys. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2010.

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Ciach, R., ed. Advanced Light Alloys and Composites. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9068-6.

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Rimdusit, Sarawut, Chanchira Jubsilp, and Sunan Tiptipakorn. Alloys and Composites of Polybenzoxazines. Singapore: Springer Singapore, 2013. http://dx.doi.org/10.1007/978-981-4451-76-5.

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R, Ciach, North Atlantic Treaty Organization. Scientific Affairs Division., and NATO Advanced Study Institute on Advanced Light Alloys and Composites (1997 : Zakopane, Poland), eds. Advanced light alloys and composites. Dordrecht: Kluwer Academic Publishers, 1998.

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Vries, Hindrik Willem de. Weldability of aluminium-matrix composites. Delft: Delft University Press, 1998.

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Fitzgerald, Suzanne N. Metal matrix composites: Focus on alloys and lattice dynamics. Hauppauge, N.Y: Nova Science Publishers, 2011.

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Book chapters on the topic "Alloy composites"

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Binczewski, G. J., and W. K. Kramer. "Simultaneous Casting of Alloy Composites." In Essential Readings in Light Metals, 619–27. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48228-6_76.

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Binczewski, G. J., and W. K. Kramer. "Simultaneous Casting of Alloy Composites." In Essential Readings in Light Metals, 619–27. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118647783.ch76.

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Kumar, Santosh, and Swarn Singh. "Corrosion Behavior of Metal, Alloy, and Composite." In Metal Matrix Composites, 57–82. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003194910-3.

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Urbanovich, V. S. "The Diamond and Hard Alloy-Based Composite Material." In Diamond Based Composites, 53–62. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5592-2_5.

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Novikov, N. V., G. I. Chepovetskiy, and V. N. Kulakovskiy. "Fatigue Life of Diamond/Hard Alloy Composite Materials." In Brittle Matrix Composites 2, 194–97. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2544-1_19.

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Yermolaeva, N. S., S. V. Petinov, and T. I. Letova. "FEM Modeling of the Aluminium Alloy Microplasticity." In Advanced Light Alloys and Composites, 427–32. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9068-6_56.

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Gille, W., and O. Kabisch. "SAS Studies of AlLi 9,07at% Sc 0.11at% Alloy." In Advanced Light Alloys and Composites, 319–24. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9068-6_40.

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Zheng, Qingjun, and Ramana G. Reddy. "In-SituProcessing of Al Alloy Matrix Composites." In Affordable Metal-Matrix Composites for High Performance Applications II, 199–210. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118787120.ch15.

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Yang, Sung Yong, Byeong Chun Goo, and Hyung Jin Kim. "Mechanical Behavior of Shape Memory Alloy Composites." In Key Engineering Materials, 1551–58. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-978-4.1551.

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Pandian, Vasanthakumar, and Sekar Kannan. "Advancement in Liquid Processing Techniques of Aerospace-Grade 7XXX Series Aluminium Alloy and Composites." In Metal Matrix Composites, 225–51. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003194897-10.

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Conference papers on the topic "Alloy composites"

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Singh, Ram, and R. N. Rai. "Characterization of B4C-composite-reinforced aluminum alloy composites." In ADVANCES IN MECHANICAL DESIGN, MATERIALS AND MANUFACTURE: Proceedings of the First International Conference on Design, Materials and Manufacture (ICDEM 2018). Author(s), 2018. http://dx.doi.org/10.1063/1.5029649.

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Lester, Brian T., Yves Chemisky, Dimitris C. Lagoudas, Andrew B. Geltmacher, Richard K. Everett, and Siddiq M. Qidwai. "Virtual Processing of Hybrid Shape Memory Alloy Composites." In ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2011. http://dx.doi.org/10.1115/smasis2011-5083.

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The capability of using recoverable martensitic transformation to modify the residual stress-state of hybrid Shape Memory Alloy (SMA) composites is explored. It is shown that through careful selection of a thermomechanical loading path the composite can be “processed” such that the constituent phases have a beneficial residual stress-state. Specifically, for materials which have preferred loading conditions (i.e., compression versus tension) resulting in improved material properties, such processing places the considered phase into a preferred stress state. This processing is explored here by considering composites with an SMA phase whose constititutive behavior is described by a recent phenomenological model and an elasto-plastic second phase. To consider realistic microstructural effects, a 3D numerical representation of the composite is generated using microtomography. It is shown that through an actuation (isobaric) loading path, the martensitic transformation of the SMA phase generates irrecoverable strains in the elasto-plastic phase which, upon unloading, results in a favorable residual stress-state. To consider the applicability of this methodology for a variety of composites, the effect of thermal residual stresses due to thermal expansion mismatch is identified and matrix phases with different elastic moduli and plastic hardenings are considered. Specifically, it is shown that martensitic transformation is the driving force behind the generation of the new composite residual stress-state. Through computational simulation, it is shown that increased elastic moduli or plastic hardening coefficients of the elasto-plastic phase yield small increases in residual stresses.
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Barrett, Ronald M., and R. Steven Gross. "Super-active shape memory alloy composites." In Smart Structures & Materials '95, edited by A. Peter Jardine. SPIE, 1995. http://dx.doi.org/10.1117/12.209789.

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Daghash, Sherif M., and Osman E. Ozbulut. "Superelastic Shape Memory Alloy Fiber-Reinforced Polymer Composites." In ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/smasis2016-9174.

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Fiber reinforced polymer (FRP) composites have been increasingly used in engineering applications due to their lightweights, high strength, and high corrosion resistance. However, the conventional FRPs exhibits brittle failure, low toughness, limited fatigue strength, and relatively low ultimate tensile strains. Shape memory alloys (SMAs) are a class of metallic alloys that can recover large strains upon load removal with minimal residual deformations. Besides their ability to recover large deformations, SMAs possess excellent corrosion resistance, good energy dissipation capacity, and high fatigue properties. This study explores the use of superelastic SMA fibers to reinforce a thermoset polymer matrix to produce a polymer composite with enhanced mechanical properties. Nickel-Titanium wires with a diameter of 495 micrometer are used as fibers. SMA coupons with different reinforcement ratios are fabricated using a special-made mold and following a modified hand lay-up technique. The uniaxial tensile tests are conducted under cyclic loading protocols. The results of the tests are assessed in terms of ultimate strength, ultimate strain, residual strain, and failure modes of the composites.
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Wang, Yulong, Limin Zhou, Zhenqing Wang, Haitao Huang, and Lin Ye. "Stress analysis of shape memory alloy composites." In Second International Conference on Smart Materials and Nanotechnology in Engineering, edited by Jinsong Leng, Anand K. Asundi, and Wolfgang Ecke. SPIE, 2009. http://dx.doi.org/10.1117/12.838636.

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Murakoshi, Yoichi, Toshio Sano, Sokichi Takatsu, and Ittipon Diewwanit. "NEW SINTERING PROCESS OF ALUMINUM ALLOY COMPOSITES." In Processing and Fabrication of Advanced Materials VIII. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812811431_0100.

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Bruck, Hugh A., and Charles L. Moore. "Mechanical Characterization of Shape Memory Alloy Composites for Designing Smart Structures." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0532.

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Abstract Actuators with large displacement ranges are being designed for smart structures by utilizing the unconventional mechanical behavior of Shape Memory Alloys (SMAs). This behavior is characterized by deformation recovery through thermally activated phase transformations. However, because of this deformation mechanism, conventional constitutive models cannot be employed to predict the mechanical behavior of SMAs. Appropriate constitutive models have been proposed, but their application can be computationally intensive. In this investigation, SMA wire-reinforced fiberglass composites are fabricated to determine the relationship between the mechanical response of the composite and the composition of SMA wire reinforcement. A modified linear Rule-of-Mixtures (ROM) formulation is proposed for predicting the mechanical behavior of the SMA composites. This simple, uniaxial constitutive model provides a reasonable prediction of SMA composite mechanical behavior, and is computationally efficient enough to use with Finite Element Analyses for designing smart structures that contain heterogeneous compositions.
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Chillara, Venkata Siva, and Marcelo Dapino. "Shape memory alloy-actuated bistable composites for morphing structures." In Behavior and Mechanics of Multifunctional Materials and Composites XII, edited by Hani E. Naguib. SPIE, 2018. http://dx.doi.org/10.1117/12.2296713.

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Kang, Guozheng. "Uniaxial Ratchetting of SiCP/6061Al Alloy Composites at Room and High Temperatures." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79361.

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The uniaxial strain cyclic characteristics and ratcheting behaviors of T6-treated SiCP/6061Al alloy composites were studied experimentally at room and high temperatures (573K). The cyclic softening/hardening and ratcheting behaviors of T6-treated composites and un-reinforced matrix were investigated in different loading conditions and with two volume fractions of SiC particulates. It is shown that the cyclic softening/ hardening and ratcheting behaviors of the composites are similar to those of the un-reinforced matrix in macro-scale, i.e., the ratcheting also occurs in the composites during the cyclic stressing with non-zero mean stress, and the ratcheting strain increases with the increasing of stress amplitude and mean stress; however, the addition of SiC particulates into the matrix increases the resistance of the composite to the ratcheting, and the ratcheting strain decreases as the volume fraction of SiC particulates increases. It can be also concluded that the cyclic deformation of the composites has a great temperature-dependence. Some significant conclusions are obtained, which are useful to construct a constitutive model to describe the cyclic deformation of the composites.
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Anggara, B. S., E. Handoko, and B. Soegijono. "Mechanical properties of Al-Cu alloy-SiC composites." In 3RD INTERNATIONAL CONFERENCE ON THEORETICAL AND APPLIED PHYSICS 2013 (ICTAP 2013). AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4897116.

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Reports on the topic "Alloy composites"

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Chen, I. W. Fundamental alloy design of oxide ceramics and their composites. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/7074430.

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Wiezorek, Joerg M., and Michael J. Mills. Microstructural Characterization of Interfaces in SiC-Reinforced Titanium Alloy-Matrix Composites. Fort Belvoir, VA: Defense Technical Information Center, July 1998. http://dx.doi.org/10.21236/ada351754.

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Birman, Victor. Functionally Graded Shape Memory Alloy Composites Optimized for Passive Vibration Control. Fort Belvoir, VA: Defense Technical Information Center, November 2006. http://dx.doi.org/10.21236/ada459593.

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Wawner, F. E., Schueller Jr., and R. D. Investigation of Thermo-Mechanical Effects in Silicon Carbide Whisker/Al Alloy Composites. Fort Belvoir, VA: Defense Technical Information Center, June 1990. http://dx.doi.org/10.21236/ada222635.

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Chen, I. W. Fundamental alloy design of oxide ceramics and their composites. [Annual] report, May 1, 1990--August 31, 1992. Office of Scientific and Technical Information (OSTI), December 1992. http://dx.doi.org/10.2172/10133855.

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Weerasooriya, Tusit, and Paul Moy. High Shear Strain-Rate Behavior of W-Ni-Fe Tungsten Heavy Alloy Composites as a Function of Matrix Volume Fraction. Fort Belvoir, VA: Defense Technical Information Center, May 1998. http://dx.doi.org/10.21236/ada353925.

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Crone, Wendy C., Arhur B. Ellis, and John H. Perepezko. Nanostructured Shape Memory Alloys: Composite Materials with Shape Memory Alloy Constituents. Fort Belvoir, VA: Defense Technical Information Center, March 2004. http://dx.doi.org/10.21236/ada423479.

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Anderoglu, Osman, Madhavan Radhakrishnan, Aidana Bauyrzhan, Daria Bolgova, Xiatong Yang, Boopathy Kombaiah, Mukesh Bacchav, Justin Cheng, and Nathan Mara. Nanostructured Composite Alloys for Extreme Environments. Office of Scientific and Technical Information (OSTI), June 2022. http://dx.doi.org/10.2172/1877543.

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J. Douglas Way and Paul M. Thoen. Palladium/Copper Alloy Composite Membranes for High Temperature Hydrogen Separation. US: Trustees Of The Colorado School Of Mines, August 2006. http://dx.doi.org/10.2172/898816.

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J. Douglas Way. PALLADIUM/COPPER ALLOY COMPOSITE MEMBRANES FOR HIGH TEMPERATURE HYDROGEN SEPARATION. Office of Scientific and Technical Information (OSTI), August 2004. http://dx.doi.org/10.2172/835876.

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