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In-Situ SEM Study of Temperature Effects on Austenite Grain Growth and Boundaries Migration

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Abstract:

In this work, the growth behavior of individual austenite grains of C45 alloy at 1000-1300 °C was recorded by in-situ SEM and austenite growth kinetics was analyzed. The result shows that the equivalent grain size and the annealing time conformed to the Beck relation, and the mechanism of grain growth is discussed. Based on the grain boundary migration theory, the relationship between triple junctions and the velocity of grain boundary migration is also considered, and the effect of grain boundary curvature on grain boundary migration is analyzed. The results indicate that it is not rigorous to rely only on curvature to describe the rate of grain boundary migration in polycrystal, and that the role of triple junctions has often been underestimated in previous studies of polycrystalline grain boundary migration.

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Periodical:

Materials Science Forum (Volume 1196)

Pages:

185-194

DOI:

https://doi.org/10.4028/p-ccAO3R

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Online since:

June 2026

Authors:

Sen Liu, Xian Jue Ye, Yue Fei Zhang*

Keywords:

Boundary Migrations, Grain Growth, In Situ SEM, Kinetics, Triple Junctions

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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