Nanoindentation behavior of bulk metastable Al_(65)Cu_(20)Ti_(15) alloy prepared by consolidation of the ball milled powder

摘要

Present study concerns assessment of nanomechanical property in the bulk Al_(65)Cu_(20)Ti_(15) alloy with varying microstructure synthesized by consolidation of mechanically alloyed powder at different temperature. The microstructure after consolidation at room temperature and 500 ℃ exhibits completely amorphous and nanocrystalline states respectively. Nanoindentation experiments suggest that the maximum strength and hardness values are achieved in the sample sintered at 450 ℃. The corresponding microstructure revealed dispersion of nanocrystalline intermetallic phase (<50 nm) in the amorphous matrix.