Scale-free statistics of plasticity-induced surface steps on KCl single crystals
Scale-free statistics of plasticity-induced surface steps on KCl single crystals
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DOI：
10.1088/1742-5468/2007/04/l04001
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发表时间：
2006-11
期刊：
影响因子：
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通讯作者：
J. Schwerdtfeger;E. Nadgorny;F. Madani-Grasset;V. Koutsos;J. Blackford;M. Zaiser
中科院分区：
文献类型：
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作者：
J. Schwerdtfeger;E. Nadgorny;F. Madani-Grasset;V. Koutsos;J. Blackford;M. Zaiser
塑性流动的实验研究表明，在一系列无标度尺寸分布的间歇性爆发中，随着变形的进行，时间不稳定性。在本研究中，相应的空间不连续性表现为KCl单晶的塑性流动。变形爆发导致大的表面台阶的高度分布，这是一致的应变增量的微米尺寸的样品的变形中的分布和观察到的宏观单晶样品的材料的变形中的声发射爆发的能量分布。
Experimental investigations of plastic flow have demonstrated temporal intermittency as deformation proceeds in a series of intermittent bursts with scale-free size distribution. In the present investigation, a corresponding spatial intermittency is demonstrated for plastic flow of KCl single crystals. Deformation bursts lead to large surface steps with a height distribution that is consistent with the distribution of strain increments in deformation of micron-size samples and the energy distribution of acoustic emission bursts observed in deformation of macroscopic single-crystal samples of a wide class of materials.