| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced High Strength Steels IV
|
| Presentation Title |
TRIP-Maraging Nanolaminate Stainless Steel |
| Author(s) |
Hyunseok Oh, Shaolou Wei, Jaclyn Leigh Cann, Cemal Cem Tasan |
| On-Site Speaker (Planned) |
Hyunseok Oh |
| Abstract Scope |
Engineering the reverted nanoscale austenite dispersed in a martensitic matrix has been known as a promising way to increase ductility and toughness without sacrificing strength in advanced high strength steels (AHSS). Recently a new medium-manganese steel, which combines transformation induced plasticity (TRIP) and maraging effects, simultaneously with nanolaminate structure, was reported to have exceptional fatigue resistance. Here we propose that such effects can be achieved in Cr containing stainless steel series by a proper simple thermomechanical treatment. The steel has full martensite structure at the as-quenched state, and partly reverted nanoscale austenite with nanolaminate structure after aging treatment. The formation of nanoprecipitates within the martensite matrix was also triggered during the aging treatment. Depending on the aging temperature, deformation mode of the reverted austenite changes from twin induced plasticity to TRIP. The TRIP-maraging Nanolaminate stainless steel thus creates an attractive pathway for simultaneously increasing ductility and toughness without sacrificing strength. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |