期刊
JOM
卷 70, 期 7, 页码 1088-1093出版社
SPRINGER
DOI: 10.1007/s11837-018-2856-6
关键词
-
类别
资金
- NSF CAREER program [NSF DMR 1654065]
- Department of Materials Science and Engineering at UIUC
Due to fluctuations in nearest-neighbor distances and chemistry within the unit cell, high-entropy alloys are believed to have a much higher resistance to dislocation motion than pure crystals. Here, we investigate the coarse-grained dynamics of a number of dislocations being active during a slip event. We found that the time-resolved dynamics of slip is practically identical in AuaOE (c) 001 > and an Al(0.3)CoCrFeNiaOE (c) 001 > high-entropy alloy, but much faster than in NbaOE (c) 001 >. Differences between the FCC-crystals are seen in the spatiotemporal velocity profile, with faster acceleration and slower velocity relaxation in the high-entropy alloy. Assessing distributions that characterize the intermittently evolving plastic flow reveals material-dependent scaling exponents for size, duration, and velocity-size distributions. The results are discussed in view of the underlying dislocation mobility.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据