Distribution of dislocations and twins in copper and 18Cr-10Ni-Ti steel under shock-wave loading

被引：11
|
作者：
Borodin, E. N. [1 ,2 ]
Atroshenko, S. A. [1 ]
Mayer, A. E. [2 ]
机构：
[1] Russian Acad Sci, Inst Problems Mech Engn, St Petersburg 199178, Russia
[2] Chelyabinsk State Univ, Chelyabinsk 454001, Russia
来源：
TECHNICAL PHYSICS | 2014年 / 59卷 / 08期
基金：
俄罗斯基础研究基金会;
关键词：
NANOCRYSTALLINE MATERIALS; PLASTIC-FLOW; LOCALIZATION; DEFORMATION;
D O I：
10.1134/S1063784214080076
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The distribution of dislocations and twins over the cross section of shock-loaded copper and 18Cr-10Ni-Ti steel specimens is investigated experimentally and numerically. It is found that the volume fraction of twins near the loaded surface and a spall crack is an order of magnitude higher than their fraction at the center of the target. The features of twins arising in different parts of the target are discussed. A model of a twinning mechanism in coarse-grained metals is proposed and used for numerical simulation of the dislocation and twin depth distribution in shock-loaded targets. It is shown that in thin targets (less than 1 mm thick), the distribution of twins can be even more uniform than the distribution of the dislocations density.
引用
收藏
页码：1163 / 1170
页数：8
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