| Abstract |
| This study was carried out to investigate the effect of reverse transformation on the mechanical properties in high manganese austenitic stainless steel. Over 95% of the austenite was transformed to deformation-induced martensite by 70% cold rolling. Reverse transformation became rapid above an annealing temperature of 550℃, but there was no significant transformation above 700℃. In addition, with an increasing annealing time at 700℃, reverse transformation was induced rapidly, but the transformation was almost completed at 10 min. There was a rapid decrese in strength and hardness with annealing at temperature above 550℃, while elongation increased rapidly above 600℃. At 700℃, hardness and strength decreased rapidly, and elongation increased steeply with an increasing reverse treatment time up to 10 min, whereas there were no significant change with a treatment time after 10 min. The reverse-transformed austenite showed an ultra-fine grain size less than 0.2 ㎛, which made it possible to strengthen the high manganese austenitic stainless steel. |
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| Key Words |
| high manganese austenite stainless steel, reverse transformation, reversed austenite, stability of austenite, deformation induced martensite |
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