Fundamental aspects of the martensite transformation curve in Fe-Ni-X and Fe-C alloys
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Abstract
This work initially reviews fundamental aspects of nucleation and growth of martensite. Next, based on previous work as well as on new unpublished work it proposes a probabilistic formalism to describe/analyze the martensite transformation curves. Furthermore, it discusses the autocatalysis that modulates the advance of martensite's nucleation determined by the stability of the alloy-system. The accommodation of the transformation strains that gives the volume fraction transformed refers to (local) interactions among growing units as well with the austenite matrix. The scarcity/randomness of martensite nucleation loci in the austenite, which promotes the initially scattered transformation, as well as underlies the microstructural evolution. The formalism was validated by fitting the transformation curves typical of the athermal as well as of the thermal-activated martensites. Keywords: Martensitic transformations, Microstructure modeling, Phase transformations, Steels, Fe-Ni-X alloys
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Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Magnetic Properties and Applications · Metallurgy and Material Forming
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References (61)
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