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Wear characteristics of TiNi shape memory alloys

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Abstract

The wear characteristics of TiNi shape memory alloys against Cr-steel have been studied. Experimental results indicate that the Ti49Ni51 alloy can exhibit a better wear resistance than Ti50Ni50 alloy due to their higher hardness and pseudoelastic behaviors. Four main mechanisms, adhesion, abrasion, surface fatigue, and brinelling, are found to have important contributions to the wear characteristics of TiNi alloys. The weight loss increases with increasing wear load and sliding distance but decreases with increasing sliding speed. The contact area during sliding wear will be increased due to the variant accommodation and/or pseudoelasticity and, hence, will reduce the average compressive stress and wear damage. Variant accommodation and/or pseudoelasticity can also stabilize the crack tips and hinder crack propagation, hence improving the wear characteristics of TiNi alloys.

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Authors and Affiliations

  1. the Department of Materials Science, Feng Chia University, Taichung, Taiwan 407, Republic of China

    H. C. Lin (Associate Professor), J. L. He (Associate Professor), K. C. Chen (Associate Professor), H. M. Liao (Graduate Student) & K. M. Lin (Professor)

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  1. H. C. Lin
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  2. J. L. He
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  3. K. C. Chen
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  4. H. M. Liao
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Lin, H.C., He, J.L., Chen, K.C. et al. Wear characteristics of TiNi shape memory alloys. Metall Mater Trans A 28, 1871–1877 (1997). https://doi.org/10.1007/s11661-997-0117-3

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  • DOI: https://doi.org/10.1007/s11661-997-0117-3

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