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The microstructure change by warm deformation in low alloy steels with different initial ferrite (α) + cementite (θ) duplex structures is discussed in the present paper. In high carbon steels, heterogeneous deformation introduced in pearlite containing lamellar θ promotes dynamic recrystallization (DRX) of α for mild deformation of less than 1.2 in true strain. On the other hand, the original α grains...
The effects of initial microstructure on the microstructure evolution of a Ti–1.5Fe (mass%) alloy during deformation in the (α+β) two-phase region are studied at different deformation temperatures. Refining interlamellar spacing and colony size of the (α+β) lamellar structure by quenching after β solutionizing results in promotion of dynamic recrystallization.
Formation of ultrafine grained ferrite by warm deformation of tempered lath martensite was investigated in Fe–2Mn–(0.1–0.8)C (mass%) alloys. Analysis of initial microstructure shows that an increase in carbon content leads to a decrease of lath martensite block size. Fine equiaxed (α) grains surrounded by high-angle boundaries are formed by dynamic recrystallization. As carbon content increases, the...
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