| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced High Strength Steels V
|
| Presentation Title |
Cryogenic Tensile and Microstructural Behaviors of High Manganese Steel Welds |
| Author(s) |
Myeonghwan Choi, Junghoon Lee, Hyunbin Nam, Namhyun Kang, Myunghyun Kim, Daewon Cho |
| On-Site Speaker (Planned) |
Myeonghwan Choi |
| Abstract Scope |
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/m2, 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 compared to that of the BM. 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. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, |