Strengthening of alloy AA6022-T4 by continuous bending under tension

doi:10.1016/j.msea.2019.04.109

IMR OpenIR

	Strengthening of alloy AA6022-T4 by continuous bending under tension
	Knezevic, Marko 1; Poulin, Camille M.1; Zheng, Xiaodong 2; Zheng, Shijian 2; Beyerlein, Irene J.3
通讯作者	Knezevic, Marko(marko.knezevic@unh.edu)
	2019-06-05
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	758 页码:47-55
摘要	This paper studies the evolution in strength of alloy AA6022-T4 sheets that have been pre-deformed by a continuous-bending-under-tension (CBT) process. Significant improvements in strength are observed only after a few CBT cycles. Less appreciable improvements in strength are observed with more CBT cycles and with every cycle the ductility reduces. These observations are rationalized by characterizing microstructural evolution using transmission electron microscopy and electron backscattered diffraction. It is found that evolution of texture and grain shape during CBT slightly differ from those in simple tension (ST). Also, the precipitates do not change their shape during CBT or ST. It is, therefore, concluded that these microstructural features have only a secondary effect on the strength behavior of the alloy. Consistent with earlier observations in the literature, we find that dislocation structures form within grains during monotonic ST and that they are disorganized and not as well defined. In contrast, cellular substructures are observed to form very early during CBT processing, even after the first cycle and to evolve from loose tangles of dislocations to well-defined walls during subsequent cycles. These dislocation patterns are found responsible for the observed behavior of the alloy. Therefore, the strength of the material is determined not only by the achieved effective strain level but also by achieved microstructure.
关键词	Elongation-to-fracture Strength Dislocation structures Continuous-bending-under-tension AA6022-T4
资助者	U.S. National Science Foundation (NSF)
DOI	10.1016/j.msea.2019.04.109
收录类别	SCI
语种	英语
资助项目	U.S. National Science Foundation (NSF)[CMMI-1727495] ; U.S. National Science Foundation (NSF)[CMMI-1728224]
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
WOS记录号	WOS:000471737800006
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：19[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/321006/134063
专题	中国科学院金属研究所
通讯作者	Knezevic, Marko
作者单位	1.Univ New Hampshire, Dept Mech Engn, 33 Acad Way,Kingsbury Hall,W119, Durham, NH 03824 USA 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 3.Univ Calif Santa Barbara, Mat Dept, Dept Mech Engn, Santa Barbara, CA 93106 USA
推荐引用方式 GB/T 7714	Knezevic, Marko,Poulin, Camille M.,Zheng, Xiaodong,et al. Strengthening of alloy AA6022-T4 by continuous bending under tension[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,758:47-55.
APA	Knezevic, Marko,Poulin, Camille M.,Zheng, Xiaodong,Zheng, Shijian,&Beyerlein, Irene J..(2019).Strengthening of alloy AA6022-T4 by continuous bending under tension.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,758,47-55.
MLA	Knezevic, Marko,et al."Strengthening of alloy AA6022-T4 by continuous bending under tension".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 758(2019):47-55.