Mechanical properties of Ti-W alloys reinforced with TiC particles

作者：Choe Heernan^*; Abkowitz Susan; Abkowitz Stanley M; Dunand David C

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2008, 485(1-2): 703-710.

DOI：10.1016/j.msea.2008.01.069

• titanium alloy
• composite
• orthopedic
• powder metallurgy
• mechanical properties
• titanium carbide

Composites consisting of a Ti-W solid-solution-strengthened matrix reinforced with TiC particles are produced by powder metallurgy. TiC additions increase strength but reduce ductility and matrix microhardness. Composites with 7.5 wt.% TiC show some tensile ductility (3-7%) but those with 15 wt.% TiC are brittle in tension. They are however strong and ductile in compression: Ti-15W/15TiC (wt.%) has a compressive yield strength exceeding 1200 MPa. This composite also shows tensile crack growth rates which are considerably faster than for pure titanium (by a factor 2) or Ti-15W (by a factor 2-6) and a fracture toughness which remains relatively high as compared to Ti-15W (21 vs. 34MPa root m).

• 出版日期2008-6-25
• 单位西北大学