|About this Abstract
||MS&T21: Materials Science & Technology
||Late News Poster Session
||P3-30: Grain Size-texture Coupling in Crystal Plasticity Finite Element Modeling : Application to Magnesium Alloys
||Aaditya Lakshmanan, Mohsen Taheri Andani, Veera Sundararaghavan, Amit Misra, John Allison
|On-Site Speaker (Planned)
Grain size refinement is a ubiquitous approach to strengthening the mechanical properties of polycrystalline alloys. The Hall-Petch effect, which refers to a linear relationship between the yield strength and inverse square-root of the average grain size, provides an avenue to phenomenologically capture this strengthening. Crystal plasticity modeling provides a general framework to simulate plasticity in polycrystals while considering the underlying microstructure. In our work, we extend the Hall-Petch relationship to the slip system level to modify the slip system resistance, where the relevant size is the slip system-level grain size, different for each point in the microstructure. The slip system-level Hall-Petch coefficient is modified to include grain boundary information via a power-law dependence on the crystallographic compatibility factor. This method is used to demonstrate the texture-dependent grain-size effect in Mg-4Al (wt %) alloys, employing crystal plasticity finite element simulations via the PRISMS-CPFE open-source software.