Wear Resistance of TiB and TiC Particles Reinforced Titanium Metal Matrix Composites Fabricated Via Blended Elemental Powder Metallurgy Process
Formerly developed TiB particle reinforced titanium metal matrix composites(Ti-MMCs)by blended elemental(BE)powder metallurgy process showed notable mechanical properties,such as a high specific strength and an excellent wear resistance.However,wear resistance is extremely sensitive to the boundary conditions and/or operating envelopment.Therefore,it is important to evaluate the wear resistance for considering the practical use conditions.The purpose of the present study is to clarify the factor dominating wear resistances of the Ti-MMCs reinforced by TiB and TiC particles,using Okoshi-type wear tester.Wear conditions were load of 22 N,sliding speed of 0.3 to 1.4 m/s,and in lubrication at ambient temperature.Wear resistances of TiB and TiC/Ti-6Al-4V(Ti-64)are superior to that of Ti-64 matrix alloys,and comparing with their wear resistances at the same volume fraction of 10 vol.%TiC particles indicated better wear resistance than TiB particles.The Youngs modulus of those Ti-MMCs were approximately 140 GPa,and 30%higher than that of Ti-64.The shape of TiB particles were a plate-like at approximately 20 μm in length,on the other hand,that of TiC particles had a spherical shape at approximately 30 μm in diameter.These results indicate that the important key factors for dominating and improving wear resistance are size,morphology and orientation of particles,which have strongly related to the real contact area of the wear surface,rather than the effect of the sharing of stress between the matrix and the reinforcement.
Titanium TiB particle TiC particle Metal matrix composites(MMCs) Wear resistance
Shiina Katsuomi Ueda Yoshihisa Furuta Tadahiko
Fine Sinter Co.,Ltd.1189-11,Nishinohora Akechi-cho,Kasugai,Aichi,480-0303,Japan Toyota Central R&D Labs.,Inc.,41-1 Yokomichi,Nagakute,Aichi,480-11,Japan
国际会议
北京
英文
996-1002
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）