Abnormal hot deformation behavior in a metallic-glass-reinforced Al-7075 composite

Abnormal hot deformation behavior in a metallic-glass-reinforced Al-7075 composite
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金属玻璃增强 Al-7075 复合材料的异常热变形行为

DOI:
10.1016/j.msea.2020.139212
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发表时间:
2020-05
影响因子:
6.4
通讯作者:
Wang Z.
Wang Z.
中科院分区:
材料科学1区
文献类型:
--
作者:
Xie M. S.;Suryanarayana C.;Zhao Y. L.;Zhang W.W.;Yang C.;Zhang G.Q.;Fu Y.N.;Wang Z.

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铝基复合材料热加工性能差,严重限制了其工程应用。这里,在金属玻璃颗粒增强AMC中观察到异常的热变形性现象,其中复合材料在室温下显示出比整体式Al-7075合金更高的强度,在更高的温度下显示出更低的强度,表明优异的热加工性。结果表明,高温下的金属玻璃由于粘度下降,可作为软粘结剂,缓解变形过程中的局部应力集中。这项研究提供了新的机会,设计和实现良好的工作性AMC先进的结构应用。
The poor hot workability of aluminum matrix composites (AMCs) severely limits their engineering use. Here an abnormal hot deformability phenomenon was observed in a metallic glass-particle-reinforced AMC in which the composite shows higher strength at room temperature and lower strength at higher temperatures than the monolithic Al-7075 alloy, indicating excellent hot workability. It reveals that the metallic glass at high temperature may be as a soft binder to release the local stress concentration during deformation owing to drop in viscosity. This study provides new opportunities for designing and achieving good workability in AMCs for advanced structural applications.
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