Dislocation nucleation and defect structure during surface indentation
Dislocation nucleation and defect structure during surface indentation
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DOI：
10.1103/physrevb.58.11085
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发表时间：
1998-11-01
影响因子：
3.7
通讯作者：
Hamilton, JC
中科院分区：
文献类型：
--
作者：
Kelchner, CL;Plimpton, SJ;Hamilton, JC
我们通过结合原子金属和硬球压头来模拟金属表面的压痕。这项工作提供了在钝化表面上位移控制压痕过程中位错成核的原子成像。位错和缺陷是通过中心对称的局部偏差定位和成像的。对于Au（ll）表面，部分位错环的形核发生在压头接触区域的表面以下。我们将这些观察结果与位错成核的经验准则和相应的连续介质弹性解进行比较和对比。[s0163 - 1829(98) 02141 - 9]。
We model indentation of a metal surface by combining an atomistic metal with a hard-sphere indenter. This work provides atomistic imaging of dislocation nucleation during displacement controlled indentation on a passivated surface. Dislocations and defects are located and imaged by local deviations from centrosymmetry. For a Au(lll) surface, nucleation of partial dislocation loops occurs below the surface inside the indenter contact area. We compare and contrast these observations with empirical criteria for dislocation nucleation and corresponding continuum elasticity solutions. [S0163-1829(98)02141-9].