The performance of structural metals at room temperature is commonly predicted based on the assumption that their microstructures are stable. Two recent studies demonstrate that room temperature plastic deformation can cause significant grain growth in Al and Mg [1, 2]. In light of these unexpected observations, we must examine the mechanisms that enable this growth, as grain growth can severely impact mechanical properties. Consequently, we performed room temperature interrupted mechanical testing on microscale-grained AZ31B to validate initial compression-induced grain growth findings  and ascertain if grain growth is seen in tension. Microstructures were characterized via EBSD to identify grain evolution as a function of strain.
 R. Goswami et al., “Fatigue-Assisted Grain Growth in Al Alloys,” Scientific Reports, vol. 7, no. 1, pp. 1-7, Aug. 2017.
 N. Krywopusk, “Characterization of Magnesium and Magnesium Alloys Processed by Equal Channel Angular Extrusion,” PhD Thesis, Johns Hopkins University, Baltimore, Maryland, 2018.