铝合金绿色制备与资源再生课题组在jmr&t上发表论文

发布者:长海博文发布时间:2020-04-03浏览次数:97

题目

Microstructural homogeneity, mechanical properties, and wear behavior of in situ Mg2Si particles reinforced Al–matrix composites fabricated by hot rolling

作者:

Dongtao WangHaitao Zhang Hiromi Nagaumi Pinfeng JiaJianzhong Cui

摘要:

In situ Mg2Si particles often show coarse and irregular morphologies in Al–matrix composites, which results in inhomogeneous microstructures and poor mechanical properties. This leads to poor deformation ability in Mg2Si particles reinforced Al–matrix composites. Herein, a refifined process exploiting refifined Mg2Si particles was developed to enhance microstructure homogeneity after hot rolling in an Al-11.73%Mg-6.63%Si composite. The hot-rolled sheet reduces the macroscopic cracking on the edge when the Mg2Si particles of the as-cast microstructure are refifined by the addition of phosphorus. The refifined Mg2Si particles in the as-cast state shows further size reduction and exhibits homogeneous distribution by hot rolling (reduction of 76%). The microstructure also shows uniform deformation zones, subgrains and high-density dislocation regions via hot rolling. The homogeneous deformation microstructure results in needle-like, high-density precipitates after artifificial aging and decreases the stress concentration of load bearing, which is benefificial to the tensile properties and wear resistance of the composite. The wear behavior of the composites improves with Mg2Si-particle refifinement and microstructural homogeneity

链接:Microstructural homogeneity, mechanical properties, and wear behavior of in situ Mg2Si particles reinforced Al–matrix composites fabricated by hot rolling.pdf