Tribology Letters

, 67:44 | Cite as

Anisotropy in Nanoscale Friction and Wear of Precipitate Containing AZ91 Magnesium Alloy

  • Deepak Kumar
  • Jayant JainEmail author
  • Nitya Nand GosvamiEmail author
Original Paper


In the present study, nanoscale friction and wear behavior of microstructure containing continuous precipitates (CPs) and discontinuous precipitates (DPs) in an aged AZ91 magnesium alloy has been evaluated using atomic force microscopy (AFM). The influence of sliding direction with respect to precipitate alignment on friction and wear response has been examined and is compared with pure magnesium. DP regions showed lowest values of friction and wear, followed by CP regions and pure Mg. In addition, for DP regions, a strong dependence of frictional force and wear on precipitate alignment with respect to the sliding direction was observed. The quantitative difference in measured friction and wear due to direction dependence can be understood with model proposed by Yu et al. and taking into account the effective contact area between the precipitate regions and the AFM probe.


AFM Wear volume Frictional force Friction anisotropy AZ91 alloy Discontinuous and continuous precipitates Sliding direction 



JJ would like to thank FIRP-IIT Delhi (Project No. MI1400) and NNG would like to acknowledge SERB (ECR/2016/001014) for financial support.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringIndian Institute of Technology DelhiNew DelhiIndia

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