Morphology and distribution of martensite in 301L alloy induced by different subsequent processes after prior deformation

The influence of different processing routes: either isothermally holding at 77 K for 72 h or deforming 10% at 77 K after prior deformation to a strain level of 20% on the increment, morphology and distribution of α′ martensites has been investigated in 301L austenitic steel. The results show that the degree of stimulation of the α′ martensite transformation depends on total strain path. A detailed microstructural study by transmission electron …