Abstract
The dislocation arrangements in austenite, deformed above the athermal M s , temperature, are dependent upon alloy composition, strain and deformation temperature and influence the subsequent transformation to martensite on quenching. In varying degrees, small amounts of deformation were found to stimulate the transformation of two alloys, 18 12 Cr-Ni and 15 13 Cr-Ni which form laths of martensite along {111} A. This behavior is correlated with the formation of long range stress fields by deformation, while mechanical stabilization at large strains is attributed to the destruction of nucleation sites and the hindrance by high densities of dislocations of the growth of martensite laths.
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