| Effect of inhomogeneity on the microstructural evolution and mechanical behaviour of a vanadium-containing Fe-Cr-Ni-Mo weld metal | |
| Sun, Jian1,2; Lu, Shanping1,2 | |
| Corresponding Author | Lu, Shanping(shplu@imr.ac.cn) |
| 2021-03-04 | |
| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| ISSN | 0921-5093 |
| Volume | 806Pages:15 |
| Abstract | Precipitation and mechanical behavior of a novel Fe-Cr-Ni-Mo weld metal containing different V contents in as-welded (AW) and post-weld heat treatment (PWHT) conditions were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), and atom probe tomography (APT). The results showed that the dislocation density increased significantly with an increase in the V content for PWHT weld metal owing to a higher volume fraction of the discrete nano-scale MC carbides pinning the dislocations. Therefore, strengthening contributions were mainly attributed to the precipitation strengthening and dislocation strengthening for PWHT weld metals containing V. The segregation of strong carbide forming elements (V and Mo) at inter-dendritic (ID) region, which was produced by solute redistribution during solidification, exhibited a major contributor to the continuous diffusion of C element from dendrite core (DC) to ID region during PWHT, so-called uphill diffusion. Also, TEM and APT showed that an inhomogeneous distribution of carbides owing to the V and Mo elemental segregation as well as the higher density dislocation at ID segregation, exhibiting that nano-scale M2C or MC carbides were mainly precipitated in ID region whilst large M3C carbides were mainly developed in DC region for PWHT weld metal. |
| Keyword | Welding Carbides Transmission electron microscopy Atom probe tomography Inter-dendritic segregation |
| Funding Organization | Major R&D Project of Liaoning Province ; National Key R&D Program of China ; Natural Science Foundation of Liaoning Province |
| DOI | 10.1016/j.msea.2021.140758 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Major R&D Project of Liaoning Province[2020JH1/10100001] ; National Key R&D Program of China[2016YFB0300601] ; Natural Science Foundation of Liaoning Province[2019JH3/30100039] |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000620945600002 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/160899 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Lu, Shanping |
| 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 | Sun, Jian,Lu, Shanping. Effect of inhomogeneity on the microstructural evolution and mechanical behaviour of a vanadium-containing Fe-Cr-Ni-Mo weld metal[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,806:15. |
| APA | Sun, Jian,&Lu, Shanping.(2021).Effect of inhomogeneity on the microstructural evolution and mechanical behaviour of a vanadium-containing Fe-Cr-Ni-Mo weld metal.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,806,15. |
| MLA | Sun, Jian,et al."Effect of inhomogeneity on the microstructural evolution and mechanical behaviour of a vanadium-containing Fe-Cr-Ni-Mo weld metal".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 806(2021):15. |
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