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

IMR OpenIR

	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
	2006
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	22 期号:6 页码:737-+
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.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, inst mech, lab nonlinear mech continuous media, beijing 100080, peoples r china. univ calif san diego, dept mech & aerosp engn, la jolla, ca 92093 usa.;xu, yb (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;ybxu@imr.ac.cn
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
URL	查看原文
WOS记录号	WOS:000242638500002
引用统计	被引频次：76[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34629
专题	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-+.