Bainite formation kinetics in steels and the dynamic nature of the autocatalytic nucleation process. (November 2017)

• Record Type: Journal Article
• Authors: Ravi, Ashwath M.; Sietsma, Jilt; Santofimia, Maria J.
• Is Part Of: Scripta materialia. Number 140(2017)
• Page Start: 82
• Page End: 86
• Publication Date: 2017-11
• Subjects: Bainite -- Kinetics -- Nucleation -- Isothermal heat treatments; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.06.051
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Over the years, a quantitative theory to explain bainite formation kinetics has been proposed based on the nucleation kinetics of bainitic sub-units. Although the theory shows acceptable correlation with experimental results, it is observed that the kinetic models show a certain degree of discrepancy with actual kinetics. It is identified that these mainly arise due to the inadequate estimation of autocatalytic nucleation, especially as a function of progress of bainite formation. With the help of this observation, the kinetic model is modified and a better insight into the process of autocatalytic nucleation, essential in bainite formation, is obtained. Graphical Abstract: