FATIGUE AND FRACTURE-BEHAVIOR OF AN ALUMINUM-LITHIUM ALLOY-8090-T6 AT AMBIENT AND CRYOGENIC TEMPERATURE

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	FATIGUE AND FRACTURE-BEHAVIOR OF AN ALUMINUM-LITHIUM ALLOY-8090-T6 AT AMBIENT AND CRYOGENIC TEMPERATURE
	Y. B. Xu ; L. Wang ; Y. Zhang ; Z. G. Wang ; Q. Z. Hu
刊名	Metallurgical Transactions a-Physical Metallurgy and Materials Science
	1991
卷号	22 期号:3 页码:723-729
关键词	al-li alloys x alloys toughness 2090-t8e41 deformation
ISSN号	0360-2133
中文摘要	An investigation has been made of the fatigue and fracture behavior of an Al-Li-Cu-Mg-Zr 8090-T6 alloy at room (300 K) and liquid nitrogen (77 K) temperatures. The fatigue and fracture strengths, as well as ductility of the alloy, have been found to increase with decreasing temperature. The observations by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) reveal that the changes in fatigue and fracture behavior with temperature are considered to be associated with the change in the deformation and fracture modes. It has been found that the occurrence of the localized shear deformation bands in which the hard precipitates are sheared by moving dislocations is responsible for the reduction of fatigue and fracture strengths as well as ductility of the alloy at room temperature. However, the improvement of both strength and ductility of the alloy at liquid nitrogen temperature might be attributed to the deeper and larger delamination that occurred on the fracture surface.
原文出处	://WOS:A1991EZ83700016
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/39484]
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,L. Wang,Y. Zhang,et al. FATIGUE AND FRACTURE-BEHAVIOR OF AN ALUMINUM-LITHIUM ALLOY-8090-T6 AT AMBIENT AND CRYOGENIC TEMPERATURE[J]. Metallurgical Transactions a-Physical Metallurgy and Materials Science,1991,22(3):723-729.
APA	Y. B. Xu,L. Wang,Y. Zhang,Z. G. Wang,&Q. Z. Hu.(1991).FATIGUE AND FRACTURE-BEHAVIOR OF AN ALUMINUM-LITHIUM ALLOY-8090-T6 AT AMBIENT AND CRYOGENIC TEMPERATURE.Metallurgical Transactions a-Physical Metallurgy and Materials Science,22(3),723-729.
MLA	Y. B. Xu,et al."FATIGUE AND FRACTURE-BEHAVIOR OF AN ALUMINUM-LITHIUM ALLOY-8090-T6 AT AMBIENT AND CRYOGENIC TEMPERATURE".Metallurgical Transactions a-Physical Metallurgy and Materials Science 22.3(1991):723-729.