Deformation mechanism and microstructures on polycrystalline aluminum induced by high-current pulsed electron beam

被引：0

作者：

CAI Jie ^{[1
]}

JI Le ^{[1
]}

YANG ShengZhi ^{[1
]}

WANG XiaoTong ^{[1
]}

LI Yan ^{[1
]}

HOU XiuLi ^{[1
]}

GUAN QingFeng ^{[1
,2
]}

机构：

[1] College of Materials Science and Engineering, Jiangsu University

[2] Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology

来源：

ChineseScienceBulletin | 2013年 / 58卷 / 20期

基金：

中国国家自然科学基金;

关键词：

high-current pulsed electron beam; pure aluminum; deformation; twinning; dislocation slipping;

D O I：

暂无

中图分类号：

TQ133.1 [铝的无机化合物];

学科分类号：

0817 ;

摘要：

In this paper, we present an experimental investigation of deformation twinning in polycrystalline aluminum exposed to high-current pulsed electron beam (HCPEB) irradiation. The residual tensile stress with about 10 2 MPa was introduced in the irradiated surface layer. The feature characteristic irradiated with various numbers of pulses was investigated. The formation of a large number of twin bands on the surface irradiated with multiple pulses was determined. The experimental observations indicated that the deformation twinning was indeed triggered during HCPEB irradiation. It is suggested that high value of stress and strain rate induced by rapid heating and cooling due to HCPEB irradiation may cause the shifting of whole atomic planes simultaneously. Additionally, some slipping systems may be suppressed due to the geometric confinement by thinned size of surface layer, which can promote the initiation of deformation twinning.

引用

页码：2507 / 2511

页数：5

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