Improving Intergranular Corrosion Resistance in Inconel 625 via Grain Boundary Character Distribution Optimization | |
Ma Yuanjun1,2; Wang Jingjie1,2; Gao Yubi1,2; Wang Xingmao1,2; Chen Jianjun1,2; Ding Yutian1,2 | |
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. |
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