Effect of Deformation Temperature on the Mechanical Behavior of a New TRIP/TWIP Steel Containing ۲۱% Manganese

In recent years, TRIP/TWIP steels have been the focus of great attention thanks due to their excellent tensile strength-ductility combination. The compression tests were performed at different temperatures from ۲۵ to۱۰۰۰°C to study the mechanical behavior of advanced austenitic steel with ۲۱% manganese plus bearing Ti. The results indicated that the plastic deformation is controlled by deformation-induced martensite and mechanical twinning from ۲۵ to ۱۰۰°C. However, at temperatures ۲۰۰ to ۱۰۰۰°C the deformation twinning was merely observed. The occurrence of mechanical twinning at such high temperatures is a first-time observation in high manganese austenitic steels. Such mechanical twins led to grain refinement via grain partitioning.

Keywords:

Metals and alloys , Phase transformation , Microstructure