Tensile and Microstructural Characteristics of Fe-24Mn Steel Welds for Cryogenic Applications
Metals and Materials International, ISSN: 2005-4149, Vol: 26, Issue: 2, Page: 240-247
2020
- 40Citations
- 17Captures
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Article Description
Abstract: Herein, we investigated the weldability and relationship between microstructure and tensile properties in 24 wt% Mn steel welds and, specifically, submerged arc welds (SAWs) were produced using these welds for cryogenic applications. The base metal (BM) and weld metal (WM) exhibited a stacking fault energy (SFE) that maintained a stable austenite phase for 27.1 and 17.0 mJ/m, respectively. Deformation twins were observed after tensile testing of the BM and WM at 298 K. Weld metals using undermatched fillers showed a lower SFE and coarser grain size (~ 86 μm) compared to that of the BM (~ 12 μm). Therefore, the tensile testing at 110 K produced deformation twins and ε-martensite. The formation of ε-martensite with deformation twins antedated necking during tensile testing and elongation decreased at 110 K. However, the SAWs of high Mn steels maintained excellent low-temperature mechanical properties such as elongation, tensile strength, and yield strength with values of 20%, 1150 MPa, and 617 MPa, respectively. Graphic Abstract: [Figure not available: see fulltext.].
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85079224892&origin=inward; http://dx.doi.org/10.1007/s12540-019-00320-4; http://link.springer.com/10.1007/s12540-019-00320-4; http://link.springer.com/content/pdf/10.1007/s12540-019-00320-4.pdf; http://link.springer.com/article/10.1007/s12540-019-00320-4/fulltext.html; https://dx.doi.org/10.1007/s12540-019-00320-4; https://link.springer.com/article/10.1007/s12540-019-00320-4
Springer Science and Business Media LLC
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