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

doi:10.1016/S0921-5093(00)01412-X

IMECH-IR > 力学所知识产出(1956-2008)

	Shear localization and recrystallization in dynamic deformation of 8090 Al-Li alloy
	Xu YB(徐永波); Zhong WL; Chen YJ; Shen LT(沈乐天); Liu Q; Bai YL(白以龙); Meyers MA; Meyers, MA (reprint author), Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA.
发表期刊	Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
	2001
卷号	299 期号:1-2 页码:287-295
ISSN	0921-5093
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.
学科领域	力学
DOI	10.1016/S0921-5093(00)01412-X
收录类别	SCI
语种	英语
WOS记录号	WOS:000166559700031
关键词[WOS]	TRANSMISSION ELECTRON-MICROSCOPY ; STRAIN-RATE BEHAVIOR ; ADIABATIC SHEAR ; PLASTIC-DEFORMATION ; BAND FORMATION ; MICROSTRUCTURE ; TITANIUM ; TEMPERATURE ; EVOLUTION ; STEELS
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
引用统计	被引频次：207[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/17132
专题	力学所知识产出(1956-2008)
通讯作者	Meyers, MA (reprint author), Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA.
推荐引用方式 GB/T 7714	Xu YB,Zhong WL,Chen YJ,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	徐永波.,Zhong WL.,Chen YJ.,沈乐天.,Liu Q.,...&Meyers, MA .(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	徐永波,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.

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