Improving Intergranular Corrosion Resistance in Inconel 625 via Grain Boundary Character Distribution Optimization

doi:10.1007/s11595-021-2487-6

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	Improving Intergranular Corrosion Resistance in Inconel 625 via Grain Boundary Character Distribution Optimization
	Ma Yuanjun 1,2; Wang Jingjie 1,2; Gao Yubi 1,2; Wang Xingmao 1,2; Chen Jianjun 1,2; Ding Yutian 1,2
刊名	JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
	2021-12-01
卷号	36 期号:6 页码:911-921
关键词	nickel-based superalloys grain boundary characteristic distribution (GBCD) corrosion behavior low Sigma coincidence site lattice (low Sigma CSL) EBSD
ISSN号	1000-2413
DOI	10.1007/s11595-021-2487-6
英文摘要	The feasibility of applying the grain boundary character distribution (GBCD) optimization to Inconel 625 for improving the intergranular corrosion (IGC) resistance was studied. The GBCD was obtained and characterized by electron backscatter diffraction (EBSD) analysis, and its optimization was mainly attributed to annealing twins (Sigma 3) and twins related to boundaries formed during thermal-mechanical processing (TMP). Through TMP of 5% cold rolling and subsequent annealing at 1150 degrees C for 5 min, the proportion of low Sigma coincidence site lattice (CSL) grain boundaries of the Inconel 625 can be enhanced to about 35.8% which mainly were of Sigma 3(n) (n=1, 2, 3) type. There is an increase of 24.8% compared with the solution-treated sample. and simultaneously the large-size highly-twinned grain-cluster microstructure is formed. The grain-cluster is mainly composed of Sigma 3-Sigma 3-Sigma 9 or Sigma 3-Sigma 9-Sigma 27 triple junctions, which is mainly caused by boundary reactions during grain growth. Among them, the IGC resistance of Sigma 3 grain boundaries, Sigma 9 grain boundaries and random grain boundaries is sequentially weakened. With the increase of the low Sigma CSL grain boundary fraction, the IGC resistance of Inconel 625 improves. The essential reason is the amount of Sigma 3 boundaries interrupting the random boundary network increases and the large grain-cluster arrests the penetration of IGC.
WOS研究方向	Materials Science
语种	英语
出版者	WUHAN UNIV TECHNOLOGY
WOS记录号	WOS:000731513300017
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/154971]
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, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China;
推荐引用方式 GB/T 7714	Ma Yuanjun,Wang Jingjie,Gao Yubi,et al. Improving Intergranular Corrosion Resistance in Inconel 625 via Grain Boundary Character Distribution Optimization[J]. JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION,2021,36(6):911-921.
APA	Ma Yuanjun,Wang Jingjie,Gao Yubi,Wang Xingmao,Chen Jianjun,&Ding Yutian.(2021).Improving Intergranular Corrosion Resistance in Inconel 625 via Grain Boundary Character Distribution Optimization.JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION,36(6),911-921.
MLA	Ma Yuanjun,et al."Improving Intergranular Corrosion Resistance in Inconel 625 via Grain Boundary Character Distribution Optimization".JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION 36.6(2021):911-921.