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Length of a Free Path of the Screw Dislocation Segments in FCC - Single Crystals

机译：FCC - 单晶的螺杆位错段的自由路径的长度 - 单晶

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摘要

One of the main objectives of the mathematical modeling of the shear plastic strain is estimation of the shear zone size. The number of point defects generated during the movement of the dislocation loop can be estimated by the length of a screw dislocations free path. The paper addresses the issue of refinement of numerical value of the shear zone diameter based on the model of dislocation interactions proposed by the authors. It is assumed that the shear zone is limited by the long strong dislocation barriers that arise as a result of the reaction between the slip dislocation loop segments and dislocations of non-coplanar slip systems. A formula for estimating the shear zone diameter depending on the length of a free path of the screw and edgy dislocations is proposed. Based on the modified model of dislocation contact interactions the estimation of the probability parameter of strong connection by the screw orientation dislocation segments is performed and the length of a free path of the screw component of a loop is defined.
机译：剪切塑料应变的数学建模的主要目的之一是避震区尺寸的估计。可以通过螺钉脱位自由路径的长度估计在位错环的移动期间产生的点缺陷的数量。本文根据作者提出的错位交互模型，解决了剪力区直径的数值改进问题。假设剪切区域受到长强脱位屏障的限制，其由于矛盾循环段与非共面滑动系统的脱位之间的反应而产生的。提出了根据螺杆和前卫脱位的自由路径的长度来估计剪切区直径的公式。基于脱位接触交互的修改模型，执行螺钉取向位错段的强连接的概率参数的估计，并且定义了环的螺杆部件的自由路径的长度。

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