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Role of Fe2O3 in Dry Sliding Wear of A Titanium Alloy and Formation of Tribo-Layers
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Huaiyin Institute of Technology

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    Abstract:

    Artificial tribo-layer containing Fe2O3 were induced to form at room temperature by supplying Fe2O3 nanoparticles and its mixtures with TiO2 or MoS2 onto the sliding interfaces of Ti6Al4V alloy and GCr15 steel. The role of Fe2O3, TiO2 and MoS2 on the sliding wear performance of Ti6Al4V alloy was respectively studied. The effect of the relative content of Fe2O3 in artificial tribo-layer on wear behavior and mechanism of Ti6Al4V alloy was also explored. Results showed that Ti6Al4V alloy indeed presented a terrible wear resistance, but it would be changed by the supplied particles. The wear rate of Ti6Al4V alloy was further accelerated by TiO2, was slightly and inappreciably reduced by MoS2, but was completely inhibited by Fe2O3. In the case of supplying TiO2-rich or MoS2-rich particles, they were agglomerated into the grooves or pits on worn surfaces, instead of forming a tribo-layer. For Fe2O3-rich particles, an artificial tribo-layer were noticed to form and cover the worn surfaces. It was confirmed that the improved elevated-temperature wear resistance of titanium alloy was attributed to the appearance of Fe2O3. As the particles of MoS2+80wt.% Fe2O3 were supplied, the tribo-layer possessed both of the lubricating property of MoS2 and the load-carrying ability from Fe2O3, which brought the best performance of friction and wear for Ti6Al4V alloy.

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[zhangqiuyang, Ding Hongyan, ZHOU Guanghong, Wang Shuqi, Zhang Lincai, Xia Mujian, Guo Xiaodong. Role of Fe2O3 in Dry Sliding Wear of A Titanium Alloy and Formation of Tribo-Layers[J]. Rare Metal Materials and Engineering,2019,48(1):159~164.]
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History
  • Received:May 17,2017
  • Revised:August 17,2017
  • Adopted:September 11,2017
  • Online: February 18,2019
  • Published: