Effect of porosity on elastic characteristics of TiC/TiNi hard alloys

Abstract

UDC 621.762.4:539.32 V. V. Akimov, M. V. Akimov, M. S. Korytov, and M. V. PlastininaA substantial effect of porosity on elastic properties of TiC/TiNi hard alloys is found. It is demonstrated that application of these materials in various elements and devices of modern engineering is inspired by a combination of their properties, such as high strength, hardness, wear resistance, and resistance to oxidation and thermal shock.

Effect of BAg1 Ni-Electroplating on microstructure and properties of WC-Co-brazed joints

“…NiTi has more toughness TiC phase, so that in the composition of TiC-NiTi, NiTi phase plays the role of matrix and by the increase of that, wear resistance and hardness are reduced, while toughness increased [40,41].…”

Effect of Sintering Temperature on Microstructure and Mechanical Properties of Ti-Nb-Sn-HA Composites Produced by Powder Metallurgy

“…The Vickers micro-hardness values (HV) result showed that the hardness of samples presented with decrease in trend with increasing of sintering temperature varying between 420.76 HV to 99.64 HV. This may be attributed with increasing porosity, the elastic and mechanical characteristic of hard alloy decrease owing to reduction of strength of interparticle contacts and also the emergence of stress concentration of the pores; these stress concentrations are determined by the pore size, shape and orientation [9]. It can be concluded that, porosity play an important role in determination of micro hardness for sintered sample; irregular pore formation and low porosity caused the micro hardness and tensile strength to decrease causing the sinter neck to easily fracture [10] whereby a small pore size and regular pore formation can be obtained with an increase in density and decrease in porosity [11].…”