nfluence of Different Temperature Deformation on the Structure and Properties of AISI310S Stainless Steel

With the help of X-ray diffraction, scanning electron microscope, transmission electron microscope, hardness test and micro-tensile test, the structure and properties of AISI310S austenitic stainless steel after large deformation at different temperatures are analyzed. The analysis results show that after large deformation at different temperatures, the austenitic stainless steel structure does not undergo strain-induced martensitic transformation under different deformations. When the amount of deformation is small, the microstructure is dominated by high-density dislocations and dislocation entanglements; as the amount of deformation increases, the microstructure is dominated by deformation twins; when the amount of deformation increases to 90% , The grain size of austenitic stainless steel is refined to nanometer level, and the degree of grain refinement in cryogenic cold rolling is significantly higher than that in room temperature cold rolling. The yield strength, tensile strength and hardness of the cryogenic cold rolled state are also higher than that of the room temperature cold rolled state. As the amount of deformation increases, the elongation decreases significantly, and the morphology of the tensile fracture changes from ductile fracture to quasi-cleavage fracture.