Effects of rare earth on microstructure and impact toughness of low alloy Cr-Mo-V steels for hydrogenation reactor vessels

doi:10.1016/j.jmst.2019.03.012

IMR OpenIR

	Effects of rare earth on microstructure and impact toughness of low alloy Cr-Mo-V steels for hydrogenation reactor vessels
	Jiang, Zhonghua 1,2; Wang, Pei 1,2; Li, Dianzhong 1,2; Li, Yiyi 1,2
通讯作者	Wang, Pei(pwang@imr.ac.cn)
	2020-05-15
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	45 页码:1-14
摘要	The effects of rare earth (RE) on the microstructure and impact toughness of low alloy Cr-Mo-V bainitic steels have been investigated where the steels have RE content of 0 to 0.048 wt.%. The results indicate that the normalized microstructures of the steels are typical granular bainite (GB) composed primarily of bainitic ferrite and martensite and/or austenite (M-A) constituents. The M-A constituents are transformed into ferrite and carbides and/or agglomerated carbides after tempering at 700 degrees C for 4 h. The addition of RE decreases the onset temperature of bainitic transformation and results in the formation of finer bainitic ferrite, and reduces the amount of carbon-rich M-A constituents. For the normalized and tempered samples, the ductile-to-brittle transition temperature (DBTT) decreases with increasing RE content to a critical value of 0.012 wt.%. Lower DBTT and higher upper shelf energy are attributed to the decreased effective grain size and lower amount of coarse agglomerated carbides from the decomposition of massive M-A constituents. However, the addition of RE in excess of 0.012 wt.% leads to a substantial increase in the volume fraction of large-sized inclusions, which are extremely detrimental to the impact toughness. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Low alloy Cr-Mo-V steel Rare earth Microstructure Impact toughness Granular bainite Martensite-austenite constituents
资助者	National Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Innovation Foundation of Graduate School of Institute of Metals Research, Chinese Academy of Sciences, China ; Liao Ning Revitalization Talents Program
DOI	10.1016/j.jmst.2019.03.012
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[U1708252] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2013126] ; Innovation Foundation of Graduate School of Institute of Metals Research, Chinese Academy of Sciences, China ; Liao Ning Revitalization Talents Program[XLYC 1807022]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000526956200001
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：46[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/138586
专题	中国科学院金属研究所
通讯作者	Wang, Pei
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Zhonghua,Wang, Pei,Li, Dianzhong,et al. Effects of rare earth on microstructure and impact toughness of low alloy Cr-Mo-V steels for hydrogenation reactor vessels[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,45:1-14.
APA	Jiang, Zhonghua,Wang, Pei,Li, Dianzhong,&Li, Yiyi.(2020).Effects of rare earth on microstructure and impact toughness of low alloy Cr-Mo-V steels for hydrogenation reactor vessels.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,45,1-14.
MLA	Jiang, Zhonghua,et al."Effects of rare earth on microstructure and impact toughness of low alloy Cr-Mo-V steels for hydrogenation reactor vessels".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 45(2020):1-14.