Effect of vanadium micro-alloying on the microstructure evolution and mechanical properties of 718H pre-hardened mold steel | |
Liu, Hanghang1,2,3; Fu, Paixian2,3; Liu, Hongwei2,3; Sun, Chen1,2,3; Du, Ningyu1,2,3; Li, Dianzhong2,3 | |
刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY |
2019-11-01 | |
卷号 | 35期号:11页码:2526-2536 |
关键词 | 718H steel Vanadium Microstructure Mechanical properties |
ISSN号 | 1005-0302 |
DOI | 10.1016/j.jmst.2019.04.033 |
通讯作者 | Fu, Paixian(pxfu@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn) |
英文摘要 | The effects of different contents of vanadium (V) (0.1, 0.2, and 0.3 wt%) on the microstructure evolution and mechanical properties of 718H steel were investigated. The precipitate was characterized by means of atom probe tomography (APT) and bright-field transmission electron microscopy (TEM). The increase in V content has great benefits for strength, but has an adverse effect on impact toughness. The strength increase can be attributed to the influence of V addition on dislocation density, misorientation gradient, and fine scale MC precipitates. Precipitation strengthening mainly contributes to the V-added steel by analyzing various strengthening mechanisms. However, fine scale MC precipitates can pin dislocation leading to a decrease in its mobility. A large number of immovable dislocations will increase the dislocation accumulation, internal stress and brittle cracking, resulting in a gradual decrease in impact toughness with the V addition. In addition, compared with V-free steel, the dissolved V content in austenite decreases the grain boundary energy and inhibits the diffusion of the C atoms, ultimately reducing the transformation range of pearlite (P). (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
资助项目 | National Key Research and Development Program of China[2016YFB0300401] ; Cooperation Program of Hubei province ; Chinese Academy of Sciences |
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:000497965900012 |
资助机构 | National Key Research and Development Program of China ; Cooperation Program of Hubei province ; Chinese Academy of Sciences |
内容类型 | 期刊论文 |
源URL | [http://ir.imr.ac.cn/handle/321006/136165] |
专题 | 金属研究所_中国科学院金属研究所 |
通讯作者 | Fu, Paixian; Li, Dianzhong |
作者单位 | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 3.Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Hanghang,Fu, Paixian,Liu, Hongwei,et al. Effect of vanadium micro-alloying on the microstructure evolution and mechanical properties of 718H pre-hardened mold steel[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(11):2526-2536. |
APA | Liu, Hanghang,Fu, Paixian,Liu, Hongwei,Sun, Chen,Du, Ningyu,&Li, Dianzhong.(2019).Effect of vanadium micro-alloying on the microstructure evolution and mechanical properties of 718H pre-hardened mold steel.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(11),2526-2536. |
MLA | Liu, Hanghang,et al."Effect of vanadium micro-alloying on the microstructure evolution and mechanical properties of 718H pre-hardened mold steel".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.11(2019):2526-2536. |
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