Microstructural path analysis of martensite burst

Materials Research

Paulo Rangel Rios¹  José Roberto Costa Guimarães¹ 

[1] ,Universidade Federal Fluminense Escola de Engenharia Industrial Metalúrgica de Volta Redonda Volta Redonda RJ ,Brazil

关键词: martensitic phase transformation;    kinetics;    nucleation;    microstructure;    analytical methods;   

DOI  :  10.1590/S1516-14392010000100023

来源: SciELO

【 摘 要 】

Modeling the martensite reaction requires reckoning with spatial aspects of the reaction. For that, we used formal kinetics, more specifically, the microstructural path method (MPM) to analyze the microstructure observed in a burst. The microstructural path analysis revealed that the size of the spread cluster in extended space, characterized by the Vandermeer and Juul-Jensen's impingement compensated mean intercept length, λG, remained constant, independently of the parent austenite grain size. Moreover, current analysis introduced a purely formal description of the reaction progress by taking the parent austenite grain size as the progress variable. This description worked very well and resulted in a relationship between the volume fraction of partially transformed austenite, V VG, and austenite grain size, λG. The significance of these findings in the light of the advantages and disadvantages of formal kinetics is discussed.

【 授权许可】

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