|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Magnesium Technology 2021
||The Effects of Basal and Prismatic Precipitates on Deformation Twinning in AZ91 Magnesium Alloy
||Brandon Leu, M Arul Kumar, Irene Beyerlein
|On-Site Speaker (Planned)
The advancement of Mg technologies is motivated by inherently high specific-strength and low-density of Mg and its alloys. For example, the AZ91 is a popular cast Mg alloy due to its relatively high strength, excellent corrosion resistance and castability. However, these Mg alloys have not yet seen widespread application due to their poor formability and twinning behavior. Understanding twinning deformation is critical in emerging Mg technology since twinning can strongly influence the ductility and stability of those materials. In particular, the interactions between twins and β-phase precipitates in AZ91 Mg-alloys are important since both twins and precipitates readily form in these alloys. In this study, we use elasto-viscoplastic fast-fourier-transform (EVP-FFT) crystal plasticity modeling to explore the interactions between twin and precipitates found in AZ91 Mg-alloys. Twin propagation, transmission across precipitates, and engulfment around precipitates will be investigated to gain a clearer understanding of how they influence twin development.