| Effect of vanadium micro-alloying on the microstructure evolution and mechanical properties of 718H pre-hardened mold steel | |
| Liu, Hanghang1,2,3; Fu, Paixian1,3; Liu, Hongwei1,3; Sun, Chen1,2,3; Du, Ningyu1,2,3; Li, Dianzhong1,3 | |
| Corresponding Author | Fu, Paixian(pxfu@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn) |
| 2019-11-01 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 35Issue:11Pages:2526-2536 |
| Abstract | 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. |
| Keyword | 718H steel Vanadium Microstructure Mechanical properties |
| Funding Organization | National Key Research and Development Program of China ; Cooperation Program of Hubei province ; Chinese Academy of Sciences |
| DOI | 10.1016/j.jmst.2019.04.033 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2016YFB0300401] ; Cooperation Program of Hubei province ; Chinese Academy of Sciences |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000497965900012 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/136166 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Fu, Paixian; Li, Dianzhong |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 3.Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China |
| Recommended Citation 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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