Effect of Warm Rolling on the Structure and Tensile Properties of a Metastable Fe-Based Medium Entropy Alloy
Metals and Materials International(2024)
摘要
The present study investigates the impact of warm rolling on the microstructure and tensile properties of Fe 60 (CoNi) 30 Cr 10 Fe-based medium entropy alloy (Fe-MEA). Warm rolling is performed above room temperature but below the recrystallization temperature. The experimental procedures involve comparing the microstructure and mechanical properties of the warm-rolled specimen with a cold-rolled and subsequently annealed specimen. Microstructural analysis reveals coarse elongated face-centered cubic grains, deformation-induced martensite, and a high density of dislocations in the warm-rolled sample. Tensile tests conducted at ambient and cryogenic temperatures demonstrate that the warm-rolled Fe-MEA exhibits enhanced strength and a similar level of elongation compared to the annealed sample. The improved mechanical properties are attributed to the transformation-induced plasticity resulting from the high dislocation density by warm rolling. This study provides valuable insights into the potential of warm rolling as a processing technique to enhance the mechanical properties of Fe-MEA, offering possibilities for broader applications. Graphical Abstract
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关键词
Ferrous medium entropy alloy,Warm rolling,Thermal–mechanical processing,Transformation induced plasticity
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