| The stress-induced martensitic transformation was studied by tensile deformation in Fe-17% Mn alloy quenched to room temperature, as a function of strain, strain rate, and deformation temperature. The structure of the alloy consisted of ε, α´ and γ. When the alloy was deformed at room temperature, the sustenite stabilization due to deformation began at 4%, while the epsilon stabilization due to deformation started at 14%. During the deformation, a large number of ε plates coalesced to some big blocks parallel to the tensile axis, and α´ martensites were formed at the angle of 45˚ to the tensile direction within them. When the deformation was carried out with variation of strain rate between 1×10^(-3)/ sec and 2×10²/sec, the contents of the three phases such as ε, α´ and γ were kept constant values in the range of strain rate below 1/sec, however the γ content was decreased in accordance with the increase in α´ content on the further strain rate. |
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