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

页码：1163 / 1170

页数：8

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