Abstract
Tensile strengths in excess of 600×103 psi were obtained in a Type 18-8 stainless steel using relatively simple thermomechanical treatments involving cold working after solution annealing and intermittent heat-treatments. The strength developed strongly depended on the hardness and amount of martensite formed as well as the maintenance of high work-hardening rates at large deformation strains. For a given level of cold work, martensite is shown to transform more rapidly using material annealed in the carbide precipitation temperature range as this tends to increase theMd temperature. The volume fraction martensite formed by wire drawing is shown to be related to the square of the deformation strain. Also shown are the effects of annealing temperature and cold work on the elastic modulus.
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