Molecular dynamics simulation and micropillar compression of deformation behavior in iridium single crystals
作者机构：State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’an710072China State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum MetalSino-platinum Metals Co.Ltd.Kunming Institute of Precious MetalsKunming650106China
出 版 物：《Rare Metals》 (稀有金属（英文版）)
年 卷 期：2023年第42卷第10期
页 面：3510-3517页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：financially supported by the National Key R&D Program of China (No. 2017YFB0305503) the Joint Funds of the National Natural Science Foundation of China (No. U1202273) the National Natural Science Foundation of China (No. 51501075)
主 题：Iridium single crystal Crystalline orientation Deformation behavior Molecular dynamics Micropillar compression
摘 要：The compression behaviors of iridium single crystals with different crystalline orientations were investigated by micropillar compression tests and molecular dynamics(MD) *** results indicated that the deformation process of iridium single crystals with [100]and [110] orientations was presented as the stacking faults expansion and the formation of Lomer-Cottrell *** the occurrence of Lomer-Cottrell locks was considered as the interaction of stacking faults on {111} planes by MD *** evolution of crystal structure in compression indicated that the Lomer-Cottrell locks might contribute to the large plastic deformation of iridium single ***,the deformation features in MD simulations showed that the elastic modulus(E) and yield stress(σ_(s)) of iridium single crystals were significantly influenced by the *** elastic modulus and yield stress gradually decreased with an increased temperature for all ***,the single crystal with a closely spaced lattice structure exhibited superior mechanical properties at a same temperature.
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