Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 24, 2016 - November 26, 2016
Tribological properties of α-titanium powder material strengthened by nitrogen solid-solution were evaluated by pin-on-disk wear test under dry condition, where SKD61 plate specimen was used as a counter material. The elemental mixture of Ti and TiN powders was compacted and sintered in vacuum, and then extruded to the full-dense Ti rods. During sintering in vacuum, TiN particles were completely decomposed via reaction with Ti powder. Nitrogen atoms originated from TiN were dissolved into α-Ti matrix as interstitial solution elements, and resulted in the micro-hardness improvement. The friction coefficient of nitrogen dissolved Ti material was extremely lower and more stable compared to pure Ti specimen employed as a reference material. The wear loss of the former was significantly smaller than that of the latter specimen. This is because of superior abrasive wear resistance of α-Ti material with nitrogen solution due to a large increment of micro-hardness of Ti matrix
