Effect of grain refinement and twin structure on the strength and ductility of Inconel 625 alloy

doi:10.1016/j.msea.2021.141739

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Effect of grain refinement and twin structure on the strength and ductility of Inconel 625 alloy
	Wang, Xingmao 1; Ding, Yutian 1; Gao, Yubi 1; Ma, Yuanjun 1; Chen, Jianjun 1; Gan, Bin 2
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2021-08-17
卷号	823
关键词	Inconel 625 alloy Thermo-mechanical treatment Strength-ductility synergy Grain refinement Annealing twins Deformation twins
ISSN号	0921-5093
DOI	10.1016/j.msea.2021.141739
英文摘要	The yield strength levels of solid-solution strengthened nickel-based superalloys are low compared to precipitation-strengthened counterparts. Here, Inconel 625 alloy was used as a model, thermo-mechanical treatments were employed to improve the yield strength of the alloys. Compared to the as-solution condition, the yield strength was increased from 291 to 676 MPa with the ductility reduced from 75 to 50% after cold rolling and annealing at 1073 K for 30 min. The strength-ductility synergy originates from (1) grain boundaries and pre-existing annealing twins act as strong barriers to hinder dislocations motion, and (2) the formation of deformation twins during plastic deformation provides an extra work-hardening region to maintain the excellent ductility. The strengthening effect of annealing twins is determined by the thickness rather than the length fraction. Deformation twins tend to form in the fine-grained Inconel 625 alloy (the grain size ranging from 3.1 to 4.7 mu m) during plastic deformation. This is the reason for an extra work hardening region in the hardening curve. Our present work can provide a reference for realizing the strength-ductility synergy of solid-solution strengthened nickel-based superalloys.
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000683889700002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148902]
专题	省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China; 2.Cent Iron & Steel Res Inst, Beijing Key Lab Adv High Temp Mat, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xingmao,Ding, Yutian,Gao, Yubi,et al. Effect of grain refinement and twin structure on the strength and ductility of Inconel 625 alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,823.
APA	Wang, Xingmao,Ding, Yutian,Gao, Yubi,Ma, Yuanjun,Chen, Jianjun,&Gan, Bin.(2021).Effect of grain refinement and twin structure on the strength and ductility of Inconel 625 alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,823.
MLA	Wang, Xingmao,et al."Effect of grain refinement and twin structure on the strength and ductility of Inconel 625 alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 823(2021).