| Improvement in toughness and ductility of friction stir welded medium-Mn steel joint via post-welding annealing | |
| Wang, Y. Q.1; Duan, R. H.1; Hu, J.1; Luo, Z. A.1; Ma, Z. Y.2; Xie, G. M.1 | |
| Corresponding Author | Xie, G. M.(xiegm@ral.neu.edu.cn) |
| 2022-08-01 | |
| Source Publication | JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
 |
| ISSN | 0924-0136 |
| Volume | 306Pages:12 |
| Abstract | The medium-Mn steels have a great application potential in the engineering fields due to its excellent strength and toughness. However, the presence of coarse martensite and segregation of Mn in the fusion-welded mediumMn steel joint severely deteriorated toughness and ductility. In this work, 6 mm thick medium-Mn steel plates were joined by friction stir welding, and then were intercritically annealed to enhance the toughness and ductility of the joint. The as-welded nugget zone (NZ) contained lath martensite with low proportion of high angle boundaries (HABs), leading to the joint with lower elongation of 22.5% and the impact energy of 73.6 J/cm(2). However, the as-annealed NZ consisted of ferrite and austenite because partial martensite changed to reversed austenite, while other martensite became ferrite during annealing. In addition, the proportion of HABs in the as-annealed NZ increased obviously. In comparison with as-welded joint, the impact energy and elongation of the as-annealed joint was increased by 70.7% and 44.4%, respectively. The abovementioned excellent mechanical properties were attributed to the high proportion of HABs and a large amount of ultra-fine reversed austenite with high thermal and mechanical stability, which provided a significant transformation induced plasticity effect, obviously inhibiting crack initiation and propagation. This systematic work provided a reference for welding similar materials containing retained austenite. |
| Keyword | Friction stir welding Medium-Mn steel Intercritical annealing Reversed austenite |
| Funding Organization | National Nature Science Foundation of China ; Liaoning Province Excellent Youth Foundation ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University |
| DOI | 10.1016/j.jmatprotec.2022.117621 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Nature Science Foundation of China[51774085] ; Liaoning Province Excellent Youth Foundation[2020-YQ-03] ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University[2020RALKFKT009] |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Industrial ; Engineering, Manufacturing ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000805771700002 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/174093 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xie, G. M. |
| Affiliation | 1.Northeastern Univ, State Key Lab Rolling & Automat, 3 Wenhua Rd, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Y. Q.,Duan, R. H.,Hu, J.,et al. Improvement in toughness and ductility of friction stir welded medium-Mn steel joint via post-welding annealing[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,2022,306:12. |
| APA | Wang, Y. Q.,Duan, R. H.,Hu, J.,Luo, Z. A.,Ma, Z. Y.,&Xie, G. M..(2022).Improvement in toughness and ductility of friction stir welded medium-Mn steel joint via post-welding annealing.JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,306,12. |
| MLA | Wang, Y. Q.,et al."Improvement in toughness and ductility of friction stir welded medium-Mn steel joint via post-welding annealing".JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 306(2022):12. |
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