Grain size effect on tensile deformation behaviors of pure aluminum

doi:10.1016/j.msea.2021.141504

IMR OpenIR

	Grain size effect on tensile deformation behaviors of pure aluminum
	Wang, B. B.1,3; Xie, G. M.2; Wu, L. H.3; Xue, P.3; Ni, D. R.3; Xiao, B. L.3; Liu, Y. D.1; Ma, Z. Y.3
通讯作者	Xue, P.(pxue@imr.ac.cn)
	2021-07-13
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	820 页码:9
摘要	Grain refinement is a very effective method to improve the mechanical properties of materials and attracts widespread interests among researchers. However, the grain size effect on the mechanical properties is still unclear due to the undesirable microstructure in ultrafine grained (UFG) materials. In the present work, series of ideal materials with average grain sizes range from 0.7 mu m to 30.0 mu m containing high fraction of high angle grain boundaries (HAGBs), equiaxed grains and low density of dislocations were produced by friction stir processing (FSP). It was found that the Hall-Petch relationships could be classified into three stages as the grain size reduced from coarse grain to UFG regimes, which were decided by the strengthening mechanisms during tensile deformation. The strengthening effect of HAGBs (71 MPa center dot mu m1/2) was almost three times of low angle grain boundaries (25 MPa center dot mu m1/2), resulting in the positive deviation of Hall-Petch slope in fine grain regime by the increased specific surface area of HAGBs. The further positive deviation of the Hall-Petch slope in UFG regime was affected by the occurrence of an extra dislocation source limited strengthening mechanism, which was up to 29 MPa and reached to about 20% of the yield strength. The increased recovery rate of dislocations at HAGBs contributed to the decrease of mobile dislocation density, leading to the losing of work hardening in UFG regime during tensile deformation.
关键词	Grain size effect Tensile properties Hall-petch relationship Strengthening mechanism
资助者	National Natural Science Foundation of China ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
DOI	10.1016/j.msea.2021.141504
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52071317] ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University[2020RALKFKT009] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017236]
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:000668737900002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：60[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/321006/159954
专题	中国科学院金属研究所
通讯作者	Xue, P.
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China 2.Northeastern Univ, State Key Lab Rolling & Automat, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, B. B.,Xie, G. M.,Wu, L. H.,et al. Grain size effect on tensile deformation behaviors of pure aluminum[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,820:9.
APA	Wang, B. B..,Xie, G. M..,Wu, L. H..,Xue, P..,Ni, D. R..,...&Ma, Z. Y..(2021).Grain size effect on tensile deformation behaviors of pure aluminum.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,820,9.
MLA	Wang, B. B.,et al."Grain size effect on tensile deformation behaviors of pure aluminum".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 820(2021):9.