Early stage dynamic damage and the role of grain boundary type

被引：51

作者：

Cerreta, E. K. ^{[1
]}

Escobedo, J. P. ^{[1
]}

Perez-Bergquist, A. ^{[1
]}

Koller, D. D. ^{[1
]}

Trujillo, C. P. ^{[1
]}

Gray, G. T., III ^{[1
]}

Brandl, C. ^{[2
]}

Germann, T. C. ^{[2
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] MS Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

SCRIPTA MATERIALIA | 2012年 / 66卷 / 09期

关键词：

Grain boundaries; Impact behavior; Microstructure; Demage; BEHAVIOR; STRAIN; STRENGTH; FRACTURE; SPALL;

D O I：

10.1016/j.scriptamat.2012.01.051

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The role of grain boundary type in the early stages of dynamic damage evolution in copper has been investigated. Through a combination of polycrystalline and large-grained specimens, it has been shown that Sigma 3 and low-angle boundaries are resistant to void nucleation during shock loading to peak compressive stresses between 1.5 and 2.5 GPa. It is postulated that these boundaries promote slip transmission or secondary slip activation and thereby relieve the stress concentrations necessary for void nucleation at a boundary. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

引用

页码：638 / 641

页数：4

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