This paper investigates the tribological behavior of 100Cr6 steel pin running against sintered steel bearing material used in hermetic compressors. Tests were conducted under dry and starved lubrication sliding conditions in air at room temperature. Although porous structure acts as crack initiation sites thus limiting the wear resistance of sintered iron in dry sliding conditions under high co...

Preparing high relative density ?-TiAl alloy by pressure-less sintering at low-cost has always been a challenge. Therefore, new kind of non-spherical pre-alloyed TiAl powder was prepared the reaction TiH2 and Al 800 °C to fabricate high-density Ti-48Al via sintering. The oxygen content controlled below 1800 ppm using coarse (~120 ?m). sintered densities ranged from 92.1% 97.5% with temperature ...

The grain boundary oxidation mechanism in hot rolled steel samples during cooling from 500 °C – 800 °C down to room temperature was mathematically modeled. Given a fixed temperature ramp, the migration of the atomic species (iron, oxygen and the alloying elements) has been calculated with the parabolic rate equation for diffusion. After each small time step, the data was transferred into the da...

With the increasing acceleration of three-dimensional (3D) printing (for example, powder bed fusion (PBF)) metal alloys as an additive manufacturing process, a comprehensive characterization 3D-printed materials and structures is inevitable. The purpose this work was to test highly densified produced from gas-atomized pre-alloyed metallic powders, namely 316L, Ti6Al4V, AlSi10Mg, CuNi2SiCr, CoCr...