A combined experimental and crystal plasticity study of grain size effects in magnesium alloys

• DOI: 10.1016/j.jma.2023.05.008
• Publication Date: 2023-06-27T12:27:56Z
• Authors: Aaditya Lakshmanan; Mohsen Taheri Andani; Mohammadreza Yagh...; John Allison; Amit Misra; Veera Sundararagh...
• Keywords: Grain boundary strengthening; Crystal Plasticity

This work presents a method to incorporate the micro Hall-Petch equation into crystal plasticity finite element (CPFE) framework accounting for microstructural features understand coupling between grain size, texture, and loading direction in magnesium alloys. The effect of size texture is accounted by modifying slip resistances individual basal prismatic systems based on equation. modification endows every system at each point with system-level maximum compatibility factor, which are turn used modify resistance. While slip-system level measure factor encodes boundary resistance computed Luster-Morris factor. model calibrated using experimental stress-strain curves Mg-4Al samples three different sizes from coefficients extracted compared predicted original parameters previous work. predictability then evaluated sample subjected directions. some parametric studies investigate variation slope degrees simulated spread relative poles microstructure strong yield strength change morphology. proposed approach CPFE provides foundation quantitatively more complicated scenarios Mg