Compressive and wear properties of Al2O3p/high manganese steel composites with a spatial lattice architecture

Abstract

An Al2O3p/high manganese steel (HMS) composite with a spatial lattice architecture was fabricated by gravity casting infiltrating, in which Al2O3p/HMS composite spheres were distributed in HMS matrix to form a spatial lattice architecture. The effect of the volume fraction of the composite spheres (7.6, 15.2, 22.8, and 30.4 vol%) of the architecture composite (AC) on the compressive and wear properties were investigated, compared with both HMS and the uniformly dispersed Al2O3p/HMS composite (UDC). The results showed that, with the fraction of composite spheres increasing, both the strength and wear resistance first increase up to 22.8 vol%, then decrease, however the plasticity varies just the opposite. And the AC possesses superior comprehensive properties of strength and plasticity. The yield strength of the 30.4 vol% AC reaches 557.3 MPa, being 37.0% and 79.5% higher than those of HMS and the UDC, respectively, meanwhile the strain of the AC increases to more than six times that of UDC. When the impact energy was 1.5 J, the 22.8 vol% AC exhibited the lowest wear rate, which is 36.6% and 44.1% lower than those of HMS and the UDC, respectively.