Abstract
Effects of equal channel angular pressing and subsequent annealing temperature on the recovery stress of Fe–19.04Mn–4.98Si–8.50Cr–4.59Ni alloy were studied. The results show the maximum recovery stress σ m and the room recovery stress σ r of the as-pressed specimen increase firstly and then decrease with increase of annealing temperature. σ m and σ r of the as-pressed specimens annealed at optimal temperature 873 K are 260 MPa and 261 MPa higher than that of the as-quenched ones, respectively. The reason is that as-pressed alloys have higher yield strength and lower M s temperature, suppressing the plastic deformation and the γ → ɛ phase transformation induced by the recovery stress in cooling.
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