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The effects of the initial microstructure of α′ martensite on the microstructural evolution during intercritical annealing and the tensile properties of annealed specimens were investigated for Fe–9Mn–0.05C (wt.%) steel. The hot-rolled specimen with fully α′ martensitic microstructure showed a mixed microstructure of lath-shaped ferrite (αL) and austenite (γL) after intercritical annealing. The αL...
Both the mechanism of the reverse transformation from martensite (α′) to austenite (γ) and the stability of reverted γ were systematically investigated as a function of the heating rate using cold-rolled Fe–(5–9)Mn–0.05C (wt.%) steels. When the specimens were slowly heated at rates below 15°Cs −1 , cementite formed along various boundaries, then the reverse transformation from α′ to γ occurred...
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