Microstructure, Mechanical Properties, and Corrosion Behavior of Mg–Al–Ca Alloy Prepared by Friction Stir Processing

Friction stir processing (FSP) was used to modify the microstructure and improve mechanical properties corrosion resistance of an Mg–Al–Ca alloy. The results demonstrated that, after FSP, grain size alloy decreased from 13.3 6.7 μm. Meanwhile, Al8Mn5 phase broken dispersed, its amount increased. yield strength ultimate tensile were increased by 17.0% 10.1%, respectively, due combination fine grain, second phase, orientation strengthening, while elongation slightly decreased. immersion electrochemical rates in 3.5 wt% NaCl solution 18.4% 37.5%, which contributed refinement. However, stress cracking (SCC) modified significantly, mainly filiform induced phase. SCC controlled anodic dissolution, cathodic hydrogen evolution accelerated process.