Electron backscatter diffraction study of dislocation content of a macrozone in hot-rolled Ti-6Al-4V alloy

被引：142
作者：
Britton, T. Ben [1 ]
Birosca, Soran [2 ]
Preuss, Michael [2 ]
Wilkinson, Angus J. [1 ]
机构：
[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England
[2] Univ Manchester, Manchester Mat Sci Ctr, Manchester M1 7HS, Lancs, England
来源：
SCRIPTA MATERIALIA | 2010年 / 62卷 / 09期
基金：
英国工程与自然科学研究理事会;
关键词：
Electron backscatter diffraction (EBSD); Dislocation structure; Titanium alloys; Rolling; Macrozone; PLASTIC STRAIN; ORIENTATION; TEXTURE; FATIGUE;
D O I：
10.1016/j.scriptamat.2010.01.010
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We compare the dislocation substructure within macrozone and non-macrozone regions of hot-rolled Ti-6Al-4 V. Hough-based and cross-correlation-based analysis of electron backscatter diffraction (EBSD) patterns are used to establish the grain orientations and intra-granular misorientations, respectively. The set of geometrically necessary dislocations (GNDs) that support measured lattice curvatures and minimize the total GND line energy are calculated. The GND content in the macrozone is approximately twice that in the non-macrozone region, and < a > GNDs are present at densities similar to 10 times higher than < c + a > GNDs. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：639 / 642
页数：4
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