材料工程Issue(1)：5-8,4.
AlCoCrNiSix高熵合金微观组织结构与力学性能
Microstructure and Mechanical Performance of AlCoCrNiSix High-entropy Alloys
刘恕骞 1黄维刚1
作者信息
- 1. 四川大学材料科学与工程学院,成都610065
- 折叠
摘要
Abstract
The effects of Si contents on the variation of phase structure, microstructure characteristic and mechanical properties of AlCoCrNiSix high-entropy alloys were characterized respectively by using of XRD, SEM, EDS and microhardness testing. The results reveal that alloys phase structure is transformed from the single bccl phase structure to the mixed bccl+ bcc2 phase structure with the increase of Si contents. The bccl is an AlNi solid solution structure and the bcc2 is CrSi solid solution structure. The as-cast microstructure of alloys has a change from the dendritic crystal morphology to the cellular crystal morphology with the Si content increasing. Al and Ni elements mainly exist in the dendritic crystal and Si element segregates in the interdendritic region within the as-cast microstructure. The Si element plays an important role in the increasing hardness of the AlCoCrNiSix alloy significantly, the highest microhardness is up to HV991.关键词
高熵合金/微观组织/相结构/力学性能Key words
high-entropy alloy/ microstructure/ phase structure/ mechanical property分类
矿业与冶金引用本文复制引用
刘恕骞,黄维刚..AlCoCrNiSix高熵合金微观组织结构与力学性能[J].材料工程,2012,(1):5-8,4.
