Deformation twinning and twinning related fracture in coarse-grained α-uranium

被引：29

作者：

Field, R. D. ^{[1
]}

McCabe, R. J. ^{[1
]}

Alexander, D. J. ^{[1
]}

Teter, D. F. ^{[1
]}

机构：

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

来源：

JOURNAL OF NUCLEAR MATERIALS | 2009年 / 392卷 / 01期

关键词：

Deformation - Diffraction - High resolution transmission electron microscopy - Uranium - Heat affected zone - Ion beams;

D O I：

10.1016/j.jnucmat.2009.03.054

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An investigation of deformation twinning in coarse-grained a-uranium was conducted within the heat-affected zone of weld specimens tested in tension. Twins and twin interactions were studied both at fracture surfaces and sub-surface, using transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD). The fracture surface plane was identified using TEM of foils cut from the fracture surface using a focused ion beam. Intersecting twins found in these foils were also analyzed. EBSD was also used to analyze twins and twin interactions at and below the fracture surface. Fracture parallel to (172) twin planes and (172) twin crossings were observed, in agreement with previous optical/Laue diffraction studies. Previously unobserved crossings of (172) twins by (112) twins were also frequently observed. These twin interactions are interpreted in terms of previously established crystallographic criteria for twin crossings. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：105 / 113

页数：9

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