Metastable austenitic steel deformation at low temperature

Harjo, S.   ; Kawasaki, Takuro   ; Gong, W.; Aizawa, Kazuya  ; Iwahashi, Takaaki

Austenitic stainless steel type 304 is well known as a metastable steel that may be transformed to have different crystal structures during plastic deformation leading increase in strength and elongation, i.e. transformation- induced plasticity (TRIP). TRIP in the JIS-SUS304 can be accelerated by decreasing the temperature for the deformation and increasing the strain rate, and the flow stresses are different by varying the temperatures, expecting that the transformation behavior may be different. To describe the relation between the flow stress and the transformation behavior, in situ neutron diffraction experiments during loading of the JIS-SUS304 at low temperatures are performed without any interruption, and time-resolving data will be discussed.