Evolution of Self-Affine Surface Roughness in Plastically Deforming KCl Single Crystals
Evolution of Self-Affine Surface Roughness in Plastically Deforming KCl Single Crystals
复制标题
塑性变形 KCl 单晶中自仿射表面粗糙度的演变
DOI：
10.22323/1.023.0012
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
M. Zaiser
中科院分区：
文献类型：
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作者：
E. Nadgorny;J. Schwerdtfeger;F. Madani;V. Koutsos;E. Aifantis;M. Zaiser
我们使用扫描白光干涉法研究KCl单晶在硬化阶段I和II的塑性变形过程中的表面形貌演变。我们表明，在变形过程中，最初几乎光滑的解理表面发展自仿射粗糙度在几个数量级的规模。一维表面轮廓的粗糙度指数ε被发现接近0.7。研究了表面粗糙化动力学，发现粗糙化速率与硬化速率有关。在硬化阶段II期间，观察到表面粗糙化速率的显著加速。表面轮廓的形态在硬化阶段I和II之间的过渡处发生变化。
We use scanning white-light interferometry to investigate the surface morphology evolution of KCl single crystals during plastic deformation in hardening stages I and II. We demonstrate that during deformation initially almost smooth as-cleaved surfaces develop self-affine roughness over several orders of magnitude in scale. The roughness exponent ζ of one-dimensional surface profiles is found to be close to 0.7. The kinetics of surface ro ughening is investigated, and the rate of roughening is shown to correlate with the hardening rate. During hardening stage II, a marked acceleration of the surface roughening rate is observed. The morphology of surface profiles changes at the transition between hardening stages I and II.