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Effect of whisker alignment on microstructure,mechanical and thermal properties of Mg-SiC_(w)/Cu composite fabricated by a combination of casting and severe plastic deformation(SPD)

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Journal of Magnesium and Alloys 2023年第3期11卷 966-980页

作者： Yinwei Wang Moslem Tayyebi Morteza Tayebi mahdireza yarigarravesh Shoufa Liu Hongwei Zhang School of Mechanical Engineering Xijing UniversityXi’anShaanxi 710123China Department of Materials Science and Engineering Shiraz University of TechnologyShirazIran Young Researchers and Elites Club Science and Research BranchIslamic Azad UniversityTehranIran Department of Civil Engineering Adjunct facultySharif University of TechnologyTehranIran

In this research,microstructure evaluation,mechanical properties and thermal conductivity of the Mg-SiC_(w)/Cu composite with laminar structure were *** this purpose,SiC whiskers were added to magnesium alloy by using stir-casting,then the Mg-SiC_(w)composite was bonded to copper layers by warm accumulative roll bonding(ARB).Based on the results of optical microscopy(OM)and scanning electron microscopy(SEM),SiC whiskers were well distributed in the magnesium matrix and they were aligned parallelly when the composites were plastically deformed at higher rolling ***,all layers remained continuous with localized necking ***,no intermetallic compounds and phases were detected by XRD and EDS *** from the significant effect of severe plastic deformation on mechanical properties,the findings of mechanical tests point to the usefulness of reinforcements in improving up to 60%microhardness,Young’s modulus,yield,and up to 41%tensile ***,thermal conductivities of composites increased by adding reinforcement and above all by increasing the number of rolling *** growth is attributed to the higher thermal diffusivity of copper and whiskers as well as the increased number of conductive layers within composite.

关键词： SiC whisker Warm accumulative roll bonding Stir-casting Thermal conductivity

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