Dynamic deformation behavior of an oxide-dispersed tungsten heavy alloy fabricated by mechanical alloying

摘要: The objective of this study is to investigate the dynamic deformation and fracture behavior an oxide-dispersed (OD) tungsten heavy alloy fabricated by mechanical alloying (MA). was processed adding 0.1 wt pct Y2O3 powders during MA, in order form fine oxides at triple junctions particles or tungsten/matrix interfaces. Dynamic torsion tests were conducted for alloy, test data compared with those a conventional liquid-phase sintered (LPS) specimen. A refinement particle size could be obtained after MA multistep heat treatment without increase interfacial area fraction between particles. results indicated that debonding occurred over broad deformed areas suggesting possibility adiabatic shear-band formation. Also, oxide dispersion effective promoting debonding, since acted as initiation sites debonding. These findings suggest idea forming would useful improving self-sharpening penetration performance alloys.