Abstract
Wear resistant TiNi-based intermetallic alloys reinforced by isolated irregular Ti 2Ni particles were fabricated by a laser melt deposition process. The alloy Ti50Ni50 included Ti 2Ni and B2 TiNi, while the alloy Ti53.8Ni46.2 consisted of Ti 2Ni and martensitic TiNi. Wear resistance of the alloys was evaluated on a block-on-wheel dry sliding wear tester at room temperature under loads of 98 N, 147 N and 196 N. The Ti 2Ni/TiNi intermetallic alloys exhibited high wear resistance. The intermetallic alloy Ti50Ni50 showed less plastic deformation than Ti53.8Ni46.2 owing to the pseudoelasticity of Ti50Ni50, while wear mass loss of Ti53.8Ni46.2 was slightly higher than Ti50Ni50 because Ti53.8Ni46.2 had more Ti 2Ni reinforcing phase that enhanced the Ti 2Ni/TiNi intermetallic alloys wear resistance at high contact stress.
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