Scale Bridging Simulations of Large Elastic Deformations and Bainitic Transformations

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• 关键词：Multi phase field ; Bainite transformation ; Phase field crystal ; ab initio Calculations ; Nonlinear elasticity ; GPU implementation
• 刊名：Lecture Notes in Computer Science
• 出版年：2017
• 出版时间：2017
• 年：2017
• 卷：10164
• 期：1
• 页码：125-138
• 丛书名：High-Performance Scientific Computing
• ISBN：978-3-319-53862-4
• 卷排序：10164

文摘

The multiscale process of bainitic microstructure formation is still insufficiently understood from a theoretical and simulation perspective. Production processes of press hardened bainitic steels lead to large deformations, and as a particular aspect we investigate the role of large elastic strains, starting from ab initio methods, bridging them to phase field crystal continuum approaches and connecting the results to macroscopic deformation laws. Our investigations show that the phase field crystal model covers large deformations in the nonlinear elastic regime very well. Concerning the microstructure evolution we use a multi phase field model including carbon diffusion, carbide formation and elastic effects. For all the covered aspects we use efficient numerical schemes, which are implemented on GPUs using CUDA.