| Effects of rare earth on microstructure and impact toughness of low alloy Cr-Mo-V steels for hydrogenation reactor vessels | |
| Jiang, Zhonghua1,2; Wang, Pei1,2; Li, Dianzhong1,2; Li, Yiyi1,2 | |
| Corresponding Author | Wang, Pei(pwang@imr.ac.cn) |
| 2020-05-15 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 45Pages:1-14 |
| Abstract | 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. |
| Keyword | Low alloy Cr-Mo-V steel Rare earth Microstructure Impact toughness Granular bainite Martensite-austenite constituents |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000526956200001 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/138586 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang, Pei |
| Affiliation | 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 |
| Recommended Citation 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. |
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