Retarding the precipitation of eta phase in Fe-Ni based alloy through grain boundary engineering

doi:10.1016/j.jmst.2020.02.018

CORC > 金属研究所 > 中国科学院金属研究所

	Retarding the precipitation of eta phase in Fe-Ni based alloy through grain boundary engineering
	Hu, Honglei 1,2; Zhao, Mingjiu 1; Rong, Lijian 1
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2020-06-15
卷号	47 页码:152-161
关键词	based alloy eta phase Precipitation behavior Random grain boundary connectivity Grain boundary engineering Boundary diffusion
ISSN号	1005-0302
DOI	10.1016/j.jmst.2020.02.018
通讯作者	Zhao, Mingjiu(mjzhao@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn)
英文摘要	It is important to inhibit the precipitation of eta phases in precipitation strengthened Fe-Ni based alloys, as they will deteriorate not only the mechanical property but also the hydrogen resistance. The present investigation shows that grain boundary engineering (GBE) can retard the formation and growth of eta phase in J75 alloy. After GBE treatment with 5% cold rolling followed by annealing at 1000 degrees C for 1 h, the fraction of special boundaries (SBs) increases from 38.4% in conventional alloy to 77.2% and the fraction of special triple junctions increases from 10% to 74%. During 800 degrees C aging treatment, quite amount of cellular eta phases adjacent to random grain boundary (RGB) will be found in conventional alloy, and only a few small eta phases have been observed in GBE treatment alloy subjected to the same aging treatment for long time. The reason for GBE in inhibiting precipitation of eta phase can be attributed to not only introducing high fraction of SBs but also breaking the connectivity of RGB networks. As nucleation and growth of eta phases on SBs are difficult due to their lower Ti concentration and diffusion rate, and the disruption of RGB networks reduces supply of Ti atoms to the eta phases significantly, which impedes their growth at RGB. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	National Natural Science Foundation of China ; China Academy of Engineering Physics[U1730140] ; National Key Research and Development Programof China[2019YFB1505201]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000526956900016
资助机构	National Natural Science Foundation of China ; China Academy of Engineering Physics ; National Key Research and Development Programof China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/138525]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhao, Mingjiu; Rong, Lijian
作者单位	1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 96 Jinzhai Rd, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Hu, Honglei,Zhao, Mingjiu,Rong, Lijian. Retarding the precipitation of eta phase in Fe-Ni based alloy through grain boundary engineering[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,47:152-161.
APA	Hu, Honglei,Zhao, Mingjiu,&Rong, Lijian.(2020).Retarding the precipitation of eta phase in Fe-Ni based alloy through grain boundary engineering.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,47,152-161.
MLA	Hu, Honglei,et al."Retarding the precipitation of eta phase in Fe-Ni based alloy through grain boundary engineering".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 47(2020):152-161.