Role of strain-induced martensite on microstructural evolution during annealing of metastable austenitic stainless steel

摘要: Metastable austenitic stainless steel of type AISI 304L was cold rolled to 90% with and without inter-pass cooling. Inter-pass cooling produced 89% strain-induced martensite whereas no resulted in the formation 43% austenite matrix. The cold-rolled specimens were annealed at various temperatures range 750–1000 °C. microstructures studied by electron microscope. grain size low angle boundaries determined from orientation maps recorded scanning microscope-based backscattered diffraction technique. observed microstructural changes correlated reversion mechanism volume fraction martensite. It noted that large fractions annealing temperatures, below 900 °C, most suitable for fine grains. On contrary, small critical temperature 950 °C refinement.