Effect of cooling rate on (ε, α') martensite formation in twinning/transformation-induced plasticity Fe-17Mn-0.06C steel

Materials Research

Sara Silva Ferreira De Dafé¹  Felipe Lucas Sicupira¹  Flávia Cristina Silva Matos¹  Naiara Silva Cruz¹  Débora Rezende Moreira¹  Dagoberto Brandão Santos¹ 

[1] ,Universidade Federal de Minas Gerais Escola de Engenharia Department of Metallurgical and Materials EngineeringBelo Horizonte MG ,Brazil

关键词: Cooling rate;    martensite formation;    grain boundaries;    stacking fault energy;   

DOI  :  10.1590/S1516-14392013005000129

来源: SciELO

【 摘 要 】

The cooling rate, density of stacking faults, austenite grain size, and temperature strongly influence the γfcc → εhcp → a'bcc martensite transformation in austenitic alloys. During cooling, austenitic Fe-Mn steels can partially transform to ε and α'martensites within a restricted chemical composition. Martensite formation will influence the mechanical behavior of the alloy. The microstructure evolution under three cooling rates of a hot-rolled austenitic steel, Fe-17.0Mn-0.06C (wt%), was analyzed by optical microscopy and scanning electron microscopy/electron backscatter diffraction. The volume fraction of martensite and austenite were measured by X-ray diffraction line profile analysis by directly comparing the as-cast alloy, alloy subjected to different cooling conditions, and this processed with hot rolling.

【 授权许可】

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