材料科学
摩擦学
合金
低温
摩擦系数
大气温度范围
蒙特卡罗方法
复合材料
化学稳定性
热力学
统计
物理
数学
作者
Jie Zhang,Guanyu Deng,Wenyue Li,Lihong Su,Xiongjun Liu,Lei Gao,Lei Gao
标识
DOI:10.1016/j.triboint.2023.109191
摘要
Presence of chemical short-range orders (SROs) had a great impact on the property-structure relationships of high/medium-entropy alloys (H/MEAs), but its influence on the tribological performance of H/MEAs has never been reported. This study provides an understanding on the chemical SRO degree dependent nanoscratching response of CrCoNi MEA by hybrid Monte-Carlo and molecular dynamic simulations. Friction coefficient, wear rate, worn surface morphology, phase stability and dislocation activities have been systematically investigated considering different load mode and temperature conditions. CrCoNi MEA exhibited superior nanotribological properties at cryogenic temperature than room temperature. Increasing chemical SRO degree is found to be effective in reducing friction and improving wear resistance and phase stability, regardless of nanoscratching conditions.
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