Study of mechanical characteristics and microstructure on ZM21 alloy with Tricalcium Phosphate using Friction stir processing

Abstract

Friction stir processing (FSP) at 1120 rpm was performed to refine surface characteristics of a magnesium alloy which included tri-calcium phosphate. Hardness tests showed that measurements of average hardness and the hardness of the surface layer have been significantly altered by the dispersed nanoparticles. Due to the deposition of greater Ca/P mineral phase, the FSP ZM21 saw less weight loss than the unprocessed alloy during immersion test investigations conducted in simulated body fluids (SBFs) in 24 hours. As demonstrated by the results of the tensile testing, the FSP ZM21 alloy had a greater ultimate tensile strength than the parent alloy. Additionally, the tensile specimens were tested after being subjected to the corrosive medium SBF for 24 hours. Results indicate an enhanced effect of grain refinement, reduced intermetallic phase, and development of supersaturated grains on retaining the improved mechanical characteristics following degradation.