What is it about?
In this research, a series of ball (WC)-on-plate reciprocating sliding wear tests are conducted under moderate and extreme sliding induced stress conditions to illustrate how 58Ni39Ti-3Hf and 60NiTi respond under sliding conditions. Results obtained from this research defines the possibility of employing 60NiTi and 58Ni39Ti-3Hf alloy in sliding applications. In addition, to fully understand the wear mechanisms and reasons causing divergence in the wear response of both materials, mechanical and micro-tribological properties of these two alloys were investigated and compared through indentation, hardness and scratch tests
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Why is it important?
Hardened 60NiTi, due to combination of high compressive strength, high Rockwell hardness, low stiffness and large elastic compressive strain, is a desirable alloy to be employed in different load bearing applications. However, a more complex ternary NiTi-Hf alloy (~58 wt.% Ni-~39 wt.% Ti-~3 wt.% Hf) designated as 58Ni39Ti-3Hf, shows improved properties over baseline 60NiTi and is recently receiving recognition as an alternative for this intermetallic. Nevertheless, it is not yet understood how these alloys behave under sliding conditions and how the sliding wear properties of 58Ni39Ti-3Hf differ from those of baseline 60NiTi.
Perspectives
Writing this article was a great pleasure as it gave the authors the opportunity to collaborate with and use the first-hand knowledge and experience of the leader of the field, Dr. Christopher DellaCorte NASA, Glenn Research Center, Cleveland, Ohio.
Dr Khashayar Khanlari
Universite de Sherbrooke
Read the Original
This page is a summary of: Comparison of the reciprocating sliding wear of 58Ni39Ti-3Hf alloy and baseline 60NiTi, Wear, August 2018, Elsevier,
DOI: 10.1016/j.wear.2018.05.011.
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