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Friction and Wear Properties of TiAl and Ti2AIN/ TiAI Composites at High Temperature
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Friction and Wear Properties of TiAl and Ti2AIN/ TiAI Composites at High Temperature
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Journal Article
Friction and Wear Properties of TiAl and Ti2AIN/ TiAI Composites at High Temperature
2013
Overview
The high-temperature friction and wear properties of TiAl alloys and Ti2AlN/TiAl composites （TTC） in contact with nickel-based superalloy were studied. The results showed that, at 800 and 1 000 ℃, the coefficient of the friction （COF） decreased with the increase of sliding velocity and the wear loss of the TTC decreased with the increase of volume fraction of Ti2AlN. The wear mechanisms of the pairs are adhesive wear and the wear debris mainly comes from the contacting nickel-based superalloy. The intergranular fracture and the cracking of the phase boundary in the lamellar structure are the wear mode of TiAl alloy. The wear mode of TTC is phase boundary fracture and adhesive spalling. The abrasive resistance of TTC is slightly higher than that of TiAl alloy.
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