Wear behaviour of AZ91D magnesium alloy with a nanocrystalline surface layer

Sun, H. Q., Shi, Y.-N. and Zhang, M.-X. (2008) Wear behaviour of AZ91D magnesium alloy with a nanocrystalline surface layer. Surface and Coatings Technology, 202 13: 2859-2864. doi:10.1016/j.surfcoat.2007.10.025


Author Sun, H. Q.
Shi, Y.-N.
Zhang, M.-X.
Title Wear behaviour of AZ91D magnesium alloy with a nanocrystalline surface layer
Journal name Surface and Coatings Technology   Check publisher's open access policy
ISSN 0257-8972
Publication date 2008-03-25
Year available 2007
Sub-type Article (original research)
DOI 10.1016/j.surfcoat.2007.10.025
Open Access Status Not yet assessed
Volume 202
Issue 13
Start page 2859
End page 2864
Total pages 6
Editor A. Matthews
B. D. Sartwell
Place of publication Lausanne, Switzerland
Publisher Elsevier Sequoia
Language eng
Subject 291403 Alloy Materials
C1
8612 Fabricated Metal Products
091207 Metals and Alloy Materials
Abstract The tribological behaviour of nanocrystalline surface layer with an average grain size of 30 ± 5 nm generated by surface mechanical attrition treatment on AZ91D Mg alloy samples has been investigated under dry sliding conditions. Compared with the alloy without SMAT, nano-grained surface layer showed lower friction coefficient. An improved wear resistance of the NC layer was found at the load ranges from 3 N to 9 N due to the grain refinement strengthening effect. Examination of the worn surface and the wear debris indicated that the wear mechanism of NC layer is similar to that of the coarse-grained alloy. Cooperative effects of cutting, plowing and oxidation govern the tribological behaviour of nanocrystalline AZ91D Mg alloys.
Formatted abstract
The tribological behaviour of nanocrystalline surface layer with an average grain size of 30 ± 5 nm generated by surface mechanical attrition treatment on AZ91D Mg alloy samples has been investigated under dry sliding conditions. Compared with the alloy without SMAT, nano-grained surface layer showed lower friction coefficient. An improved wear resistance of the NC layer was found at the load ranges from 3 N to 9 N due to the grain refinement strengthening effect. Examination of the worn surface and the wear debris indicated that the wear mechanism of NC layer is similar to that of the coarse-grained alloy. Cooperative effects of cutting, plowing and oxidation govern the tribological behaviour of nanocrystalline AZ91D Mg alloys.
© 2007 Elsevier B.V. All rights reserved.
Keyword Nanocrystalline (NC) surface layer
Friction and wear
Magnesium alloy
Surface mechanical attrition treatment (SMAT)
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 27 October 2007.

 
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