A Computational Study on Rate-sensitive Martensitic Transformation in Monocrystal TRIP Steel by Size-dependent Crystal Plasticity with Cellular Automata Approach

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  • セル・オートマトン法と寸法依存結晶塑性理論による単結晶TRIP鋼における速度依存マルテンサイト変態の数値解析的研究

Abstract

<p>During plastic deformation and strain-induced martensitic transformation (SIMT), the irreversible viscoplastic work and latent heat can act as a heat source in TRIP steel. To obtain expected mechanical properties in the steel, a deep understanding on the temperature dependency of SIMT is indispensable. At a microstructural scale, unavoidable dislocations induced by martensitic transformation can affect its plastic deformation behavior with a length scale effect. In this study, a heat conduction equation to include the martensitic transformation coupled with size-dependent crystal plasticity based on a notion of microforce is derived. Then, FE simulation with cellular automata on infinite monocrystal TRIP steel is performed at various strain rate.</p>

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