Shear banding in commercial pure titanium deformed by dynamic compression

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	Shear banding in commercial pure titanium deformed by dynamic compression
	J. L. Sun; P. W. Trimby; F. K. Yan; X. Z. Liao; N. R. Tao; J. T. Wang
	2014
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	79 页码:47-58
摘要	A cylindrical hexagonal-close-packed Ti sample was pre-deformed by dynamic compression to produce coarse-grained and ultrafine-grained structures in different parts of the sample followed by further dynamic compression to failure, making it possible to explore the effect of stored strain and grain boundary energy on shear banding in the material. A long shear band that formed during the final compression process passed through a complete diagonal of the sample. Electron backscattered diffraction was used to systematically investigate the shear-banding-induced structural evolution. Results show that the original stored energy in the matrix plays a significant role in the competition between deformation-induced grain refinement and grain growth, which determines the final average grain size in a shear band. Shear banding leads to grain reorientation such that one close-packed < 1 1 (2) over bar 0 > direction and one < 1 0 (1) over bar 0 > direction in most grains are parallel to the local shear direction and the normal direction to the local shear plane, respectively. The grain orientation in the shear band favours prismatic < a > slip, while the texture in the matrix, which is a stable compression texture, benefits the basal < a > slip. The results advance our understanding of the shear banding behaviour in heterogeneous deformation conditions and also the overall mechanical behaviour of materials under dynamic compression. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[sun, j. l. ; wang, j. t.] nanjing univ sci & technol, sch mat sci & engn, nanjing 210094, jiangsu, peoples r china. [sun, j. l. ; liao, x. z.] univ sydney, sch aerosp mech & mechatron engn, sydney, nsw 2006, australia. [trimby, p. w.] univ sydney, australian ctr microscopy & microanal, sydney, nsw 2006, australia. [yan, f. k. ; tao, n. r.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; liao, xz (reprint author), univ sydney, sch aerosp mech & mechatron engn, sydney, nsw 2006, australia. ; xiaozhou.liao@sydney.edu.au ; jtwang@njust.edu.cn
关键词	Shear Banding Microstructure Texture Ti Ebsd Ultrafine-grained Titanium Adiabatic Shear Microstructural Evolution Strain-rate Deformation-behavior Plastic-deformation Alpha-titanium Recrystallization Mechanisms Nanostructure Formation Texture Evolution
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73375
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. L. Sun,P. W. Trimby,F. K. Yan,et al. Shear banding in commercial pure titanium deformed by dynamic compression[J]. Acta Materialia,2014,79:47-58.
APA	J. L. Sun,P. W. Trimby,F. K. Yan,X. Z. Liao,N. R. Tao,&J. T. Wang.(2014).Shear banding in commercial pure titanium deformed by dynamic compression.Acta Materialia,79,47-58.
MLA	J. L. Sun,et al."Shear banding in commercial pure titanium deformed by dynamic compression".Acta Materialia 79(2014):47-58.