Formation and Evolution of Low Sigma CSL Grain Boundaries in J75 Hydrogen-Resistant Alloy

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	Formation and Evolution of Low Sigma CSL Grain Boundaries in J75 Hydrogen-Resistant Alloy
	Hu Honglei 1,2; Zhao Mingjiu 1; Rong Lijian 1
刊名	RARE METAL MATERIALS AND ENGINEERING
	2020
卷号	49 期号:1 页码:131-137
关键词	Fe-Ni based alloys J75 low Sigma CSL grain boundary grain boundary character distribution grain boundary evolution
ISSN号	1002-185X
通讯作者	Zhao Mingjiu(mjzhao@imr.ac.cn)
英文摘要	The researches in the area of grain boundary engineering were mainly focused on the relationship between process, microstructure and properties. However, little attention had been paid to the formation and evolution process of low Sigma CSL grain boundaries. To better understand the dynamic process, electron backscatter diffraction (EBSD) was used to analyze the grain boundary migration and evolution in J75 alloy. Single-step deformation heat treatment with 5% pre-deformation and 1000 degrees C annealing was used to increase the proportion of low-Sigma CSL grain boundaries to over 70%, and formed grain clusters with Sigma 3(n) orientation relationship to break the connectivity of random grain boundaries. During the annealing process, the migration ability of Sigma 3(ic) was strong, and when it encountered other Sigma 3, Sigma 9 would be formed; in addition, Sigma 3 with Sigma 9 would lead to Sigma 3+Sigma 9 -> Sigma 27 or Sigma 9+Sigma 3 -> Sigma 3 processes, and the latter was more likely to occur. The Sigma 3 regeneration was closely related to the Sigma 3(ic) grain boundary; a mechanism for breaking the connectivity of random grain boundary network was proposed. When random grain boundary met low Sigma CSL grain boundary, R/Sigma would form. If the ratio (R/Sigma)<= 29, the connectivity of random grain boundaries network could be interrupted.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000509418200017
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/137464]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhao Mingjiu
作者单位	1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Hu Honglei,Zhao Mingjiu,Rong Lijian. Formation and Evolution of Low Sigma CSL Grain Boundaries in J75 Hydrogen-Resistant Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2020,49(1):131-137.
APA	Hu Honglei,Zhao Mingjiu,&Rong Lijian.(2020).Formation and Evolution of Low Sigma CSL Grain Boundaries in J75 Hydrogen-Resistant Alloy.RARE METAL MATERIALS AND ENGINEERING,49(1),131-137.
MLA	Hu Honglei,et al."Formation and Evolution of Low Sigma CSL Grain Boundaries in J75 Hydrogen-Resistant Alloy".RARE METAL MATERIALS AND ENGINEERING 49.1(2020):131-137.