Processing and mechanical properties of SiC reinforced cast magnesium matrix composites by stir casting process
Processing and mechanical properties of SiC reinforced cast magnesium matrix composites by stir casting process
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DOI：
10.1016/j.msea.2007.01.052
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发表时间：
2007-07-15
期刊：
影响因子：
6.4
通讯作者：
Sahoo, K. L.
中科院分区：
文献类型：
--
作者：
Poddar, Palash;Srivastava, V. C.;Sahoo, K. L.
元素镁和镁合金（AZ 91 D）基复合材料，用15体积%用搅拌铸造法合成了平均粒径为15 μ m和150 μ m碳化硅（SiC）颗粒。研究了铸态和T4热处理条件下的颗粒分布、颗粒-基体界面反应、硬度和力学性能。复合材料中SiC颗粒分布均匀。平均晶粒尺寸随着SiC颗粒的存在而减小，并且晶粒尺寸随着颗粒尺寸的减小而进一步减小。AZ 91 D合金复合材料的硬度和弹性模量的增加相比，单片合金。含有15 μ m尺寸SiC颗粒的复合材料的弹性模量的改善显著高于含有150 μ m尺寸颗粒的复合材料。复合材料的极限拉伸强度和塑性比未增强的合金有所降低。(C)2007 Elsevier B. V.保留所有权利。
Elemental Mg and Mg-alloy (AZ91D) based composites reinforced with 15 vol.% silicon carbide (SiC)particulates (average particle size 15 mu m and 150 mu m) were synthesised by stir casting technique. Particle distribution, particle-matrix interfacial reaction, hardness and mechanical properties in the as cast as well as T4 heat-treated conditions were investigated. The composite materials show uniform distribution of SiC particulates. The average grain size decreases with the presence of SiC particulates and the grain size further decreases as the particle size decreases. The AZ91D alloy composite shows an increase in hardness and elastic modulus compared to monolithic alloys. The improvement in elastic modulus of composite containing 15 mu m size SiC particles is significantly higher than the composite with 150 mu m size particles. The ultimate tensile strength and ductility of composite materials were reduced compared to unreinforced alloy. (C) 2007 Elsevier B.V. All rights reserved.