Deformation, phase transformation and recrystallization in the shear bands induced by high-strain rate loading in titanium and its alloys

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	Deformation, phase transformation and recrystallization in the shear bands induced by high-strain rate loading in titanium and its alloys
	Y. B. Xu ; Y. L. Bai ; M. A. Meyers
刊名	Journal of Materials Science & Technology
	2006
卷号	22 期号:6 页码:737-+
关键词	localized shear bands microstructure dislocations twinning phase transformation recrystallization transmission electron-microscopy adiabatic shear dynamic deformation plastic-deformation ti-6al-4v alloy 4340 steel localization microstructure evolution instability
ISSN号	1005-0302
中文摘要	alpha-titanium and its alloys with a dual-phase structure (alpha+beta) were deformed dynamically under strain rate of about 10(4) s(-1). The formation and microstructural evolution of the localized shear bands were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results reveal that both the strain and strain rate should be considered simultaneously as the mechanical conditions for shear band formation, and twinning is an important mode of deformation. Both experimental and calculation show that the materials within the bands underwent a superhigh strain rate (9 x 10(5) s(-1)) deformation, which is two magnitudes of that of average strain rate required for shear band formation; the dislocations in the bands can be constricted and developed into cell structures; the phase transformation from alpha to alpha(2) within the bands was observed, and the transformation products (alpha(2)) had a certain crystallographic orientation relationship with their parent; the equiaxed grains with an average size of 10 mu m in diameter observed within the bands are proposed to be the results of recrystallization.
原文出处	://WOS:000242638500002
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/34629]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. B. Xu,Y. L. Bai,M. A. Meyers. Deformation, phase transformation and recrystallization in the shear bands induced by high-strain rate loading in titanium and its alloys[J]. Journal of Materials Science & Technology,2006,22(6):737-+.
APA	Y. B. Xu,Y. L. Bai,&M. A. Meyers.(2006).Deformation, phase transformation and recrystallization in the shear bands induced by high-strain rate loading in titanium and its alloys.Journal of Materials Science & Technology,22(6),737-+.
MLA	Y. B. Xu,et al."Deformation, phase transformation and recrystallization in the shear bands induced by high-strain rate loading in titanium and its alloys".Journal of Materials Science & Technology 22.6(2006):737-+.