In situ analysis of cryogenic strain of AISI 316L stainless steel using synchrotron radiation
作者： Maicon Rogerio Crivoi , John Jairo Hoyos , Marcel Tadashi Izumi , Denilson José Marcolino de Aguiar , Ricardo Sanson Namur
DOI: 10.1016/J.CRYOGENICS.2019.103020
关键词: Materials science 、 Austenite 、 Ultimate tensile strength 、 Diffusionless transformation 、 Work hardening 、 Composite material 、 Austenitic stainless steel 、 Martensite 、 Plasticity 、 Stacking-fault energy
摘要: Abstract AISI 316L austenitic stainless steel was tested by simultaneous uniaxial tensile tests and X-ray diffraction measurements at room cryogenic temperatures. The decrease in temperature reduced the stacking fault energy, which increase rate of martensitic transformation. This led to an intensive formation martensite during early stage deformation, consequently induced a discontinuous yielding. strength higher than that obtained temperature, while ductility did not change significantly. behavior could be associated with Transformation Induced Plasticity (TRIP) effect since α′ increased work hardening rate. In addition, threshold strain for onset yielding seems related lattice microstrain austenite martensite.
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