|About this Abstract
||MS&T23: Materials Science & Technology
||Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales V
||Monte Carlo Grain Growth Simulations of Discontinuous Changes in Grain Boundary Velocity Induced by Grain Boundary Transformations
||Christopher J. Marvel, Caroline Riedel, Houliang Zhou, Ben Zalatan, Brian Chen, Martin Harmer
|On-Site Speaker (Planned)
||Christopher J. Marvel
It has been observed that grain boundaries undergo first-order transitions, resulting in discontinuous changes of grain boundary (GB) properties, particularly mobility. However, upon instant changes in GB mobility, it is unclear if there is a proportional increase in GB velocity, which more directly drives microstructure evolution. In this work, 3D Monte Carlo Potts grain growth models were completed and GB velocities were tracked in the presence of stochastic GB transitions that increased GB ‘mobility’. GB curvature was measured using the innie/outie methodology, GB velocity was quantified by tracking net voxel swapping, and discontinuous changes in GB velocity were assessed by comparing GB curvature and mobility time series. The main result was that GB velocity, on average, did not increase by a proportional level in line with mobility; thus, triple junction drag mechanisms were hypothesized to restrict appropriate changes in velocity. Further interpretation of the computational results will be discussed.