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- W4291002246 abstract "Samples of a Fe–34.5Mn–0.04C (wt. %) austenitic steel with average grain size in the range from 0.45 to 21.0 μm were produced by cold rolling and subsequent annealing. The effects of microstructure on room–temperature (RT) and cryogenic tensile properties, and on the related fracture modes, were investigated. It is found that for fully recrystallized samples (those with average grain size in the range from 2.3 to 21 μm), both the yield strength and uniform elongation increase with decreasing grain size at both RT and −180 °C, while for smaller grain sizes (corresponding to partly recrystallized samples) the strength increases at the expense of uniform elongation. In general, samples with an average grain size of 2.3 μm show a better combination of strength and ductility than samples with larger grain sizes. A detailed characterization of the microstructure and fracture surfaces after failure reveals that grain refinement results in elimination of grain boundary martensite, thereby leading to a transition from transgranular and intergranular fracture modes to a ductile fracture mode, characterized by dimpled fracture surfaces. The results are discussed with respect to stacking fault energy and to the Mn and C content. The study provides important inputs for the design of advanced Fe–Mn–C steels for cryogenic applications." @default.
- W4291002246 created "2022-08-13" @default.
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- W4291002246 date "2022-09-01" @default.
- W4291002246 modified "2023-10-16" @default.
- W4291002246 title "Tailoring the microstructure to enhance the cryogenic mechanical properties of a Fe–34.5Mn–0.04C steel" @default.
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- W4291002246 doi "https://doi.org/10.1016/j.msea.2022.143769" @default.
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