Shear localization and recrystallization in dynamic deformation of 8090 Al-Li alloy

IMR OpenIR

	Shear localization and recrystallization in dynamic deformation of 8090 Al-Li alloy
	Y. B. Xu; W. L. Zhong; Y. J. Chen; L. T. Shen; Q. Liu; Y. L. Bai; M. A. Meyers
	2001
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	299 期号:1-2 页码:287-295
摘要	The microstructural evolution in localized shear deformation was investigated in an 8090 Al-Li alloy by split Hopkinson pressure bar (strain rate of approximately 10(3) s(-1)) at ambient temperature and 77 K. The alloy was tested in the peak-, over-, under-, and natural-aged conditions, that provide a wide range of microstructural parameters and mechanical properties. Two types of localized shear bands were distinguished by optical microscopy: the deformed shear band and the white-etching shear band. They form at different stages of deformation during localization. There are critical strains for the occurrence of deformed and white-etching localized shear deformation, at the imposed strain rate. Observations by transmission electron microscopy reveal that the white-etching bands contain fine equiaxed grains; it is proposed that they are the result of recrystallization occurring during localization. The deformed-type bands are observed after testing at 77 K in all heat treatment conditions, but they are not as well defined as those developed at ambient temperature. Cracking often occurs along the localized shear at ambient temperature. The decrement in temperature is favorable for the nucleation, growth and coalescence of the microcracks along the shear bands, inducing fracture. (C) 2001 Elsevier Science B.V. All rights reserved.
部门归属	univ calif san diego, dept mech & aerosp engn, la jolla, ca 92093 usa. chinese acad sci, inst met res, state key lab fatique & fracture mat, shenyang 110015, peoples r china. chinese acad sci, inst mech, lab nonlinear mech continuous media, beijing 110080, peoples r china.;meyers, ma (reprint author), univ calif san diego, dept mech & aerosp engn, la jolla, ca 92093 usa
关键词	Shear Localization Recrystallization Dynamic Deformation 8090 Al-li Alloy Transmission Electron-microscopy Strain-rate Behavior Adiabatic Shear Plastic-deformation Band Formation Microstructure Titanium Temperature Evolution Steels
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WOS记录号	WOS:000166559700031
引用统计	被引频次：218[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/321006/36858
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. B. Xu,W. L. Zhong,Y. J. Chen,et al. Shear localization and recrystallization in dynamic deformation of 8090 Al-Li alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2001,299(1-2):287-295.
APA	Y. B. Xu.,W. L. Zhong.,Y. J. Chen.,L. T. Shen.,Q. Liu.,...&M. A. Meyers.(2001).Shear localization and recrystallization in dynamic deformation of 8090 Al-Li alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,299(1-2),287-295.
MLA	Y. B. Xu,et al."Shear localization and recrystallization in dynamic deformation of 8090 Al-Li alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 299.1-2(2001):287-295.