|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced High-Strength Steels
||F-7: Effect of Austenite Grain Size on Deformed Microstructures and Tensile Properties of Austenitic Fe-24.5Mn-4Cr-0.45C Alloy
||Sang-In Lee, Hyeon-Seok Lim, Byoungchul Hwang
|On-Site Speaker (Planned)
In recent years, austenitic high-Mn steels for cryogenic applications have been increasingly used because they have excellent cryogenic-temperature mechanical properties which are comparable to expensive alloys such as austenitic stainless steels, 9% Ni alloys, and Ni-based Invar alloys. However the yield strength of high-Mn steels is not as high as those of other advanced high strength steels. During the deformation of austenitic high-Mn steels, various deformation behaviors such as mechanical twinning, ε-martensite transformation and dislocation gliding occur in accordance with the stacking fault energy (SFE). Since the austenite stability of high-Mn steel is strongly affected by alloying elements and grain size, however, the deformation behavior appears differently according to the alloy systems investigated by researchers. In the present study, Fe-Mn-Cr-C based austenitic high-Mn steels with different grain size were fabricated by varying annealing temperature, and then the effects of grain size on deformation behaviors and tensile properties were systematically investigated.
||Planned: Supplemental Proceedings volume