Abstract:
Conventional wear-resistant metal matrix composites generally suffer from low plastic toughness. The spherical interpenetrating architecture design of Al
2O
3 ceramic particle (Al
2O
3p) reinforcement high manganese steel composites was carried out, and the effects of the architectured parameters, modes and heat treatment on the compressive properties of the composites were investigated. Al
2O
3p/high manganese steel spherical interpenetrating composites with three architectured parameters (ball diameter
φ of 6 mm, 7 mm, 8 mm) combined with two architectured modes (parallel and staggered), uniformly dispersed composite, and matrix materials were prepared. The results show that the compressive properties of the materials decrease with the increase of the architectured parameters (volume fraction of the composite zone) under the same architectured mode, with the best yield strength, compressive strength, and (under compressive strength) strain for
φ6 materials, increasing by 203.8%, 236.1%, and 134.8%, respectively compared with the uniform dispersed composites. The yield strength increases by 107.5% compared with the matrix materials. Under the same architectured parameter, the yield strength, compressive strength and strain of staggered-arrany are increased by 10.9%, 28.5%, and 16.3%, respectively, compared with the parallel-arrany. The yield strength is reduced by 35.2%, the compressive strength is increased by 11.0% and the strain is increased by 163.1% for staggered-arrany composites after water toughness treatment. Cracks tend to sprout and expand at the interface between the matrix and composite zones, but the matrix can hinder the crack expansion. Staggered-arrany increases the minimum spacing of the composites zones and enhances plasticity.