The present work involves the study of the effect of precipitates on mechanical and tribological properties of AZ91 magnesium alloy. Optical microscopy, scanning electron microscopy (SEM), and nanoindentation were used to characterize the microstructures and mechanical properties of the alloy. In addition, the wear behavior of the alloy was deduced using a pin-on disk tribological configuration under unidirectional sliding against steel (AISI 250). The elastic modulus of AZ91 alloy was found to vary significantly with changing precipitation state. The tribological evaluations showed that the specific wear-rate of solutionized sample is lowest as compared to the aged samples. This was attributed to the absence of γ-Mg17Al12 phase. Examination of worn surfaces suggested that microploughing coupled with the adhesive mode of wear is the main wear mechanism in the aged samples.
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April 2015
Research-Article
Effect of Precipitates on Mechanical and Tribological Performance of AZ91 Magnesium Alloy–Steel Couple
Deepak Kumar,
Deepak Kumar
1
Industrial Tribology,
Machine Dynamics and Maintenance
Engineering Centre,
Machine Dynamics and Maintenance
Engineering Centre,
Indian Institute of Technology Delhi
,New Delhi 110016
, India
1Coresponding author.
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Jayant Jain,
Jayant Jain
Department of Applied Mechanics,
Indian Institute of Technology Delhi
,New Delhi 110016
, India
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Tulsi Bisht,
Tulsi Bisht
Industrial Tribology,
Machine Dynamics and Maintenance
Engineering Centre,
Machine Dynamics and Maintenance
Engineering Centre,
Indian Institute of Technology Delhi
,New Delhi 110016
, India
Search for other works by this author on:
Anuz Zindal
Anuz Zindal
Department of Applied Mechanics,
Indian Institute of Technology Delhi
,New Delhi 110016
, India
Search for other works by this author on:
Deepak Kumar
Industrial Tribology,
Machine Dynamics and Maintenance
Engineering Centre,
Machine Dynamics and Maintenance
Engineering Centre,
Indian Institute of Technology Delhi
,New Delhi 110016
, India
Jayant Jain
Department of Applied Mechanics,
Indian Institute of Technology Delhi
,New Delhi 110016
, India
Tulsi Bisht
Industrial Tribology,
Machine Dynamics and Maintenance
Engineering Centre,
Machine Dynamics and Maintenance
Engineering Centre,
Indian Institute of Technology Delhi
,New Delhi 110016
, India
Anuz Zindal
Department of Applied Mechanics,
Indian Institute of Technology Delhi
,New Delhi 110016
, India
1Coresponding author.
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received August 6, 2014; final manuscript received November 23, 2014; published online January 27, 2015. Assoc. Editor: Satish V. Kailas.
J. Tribol. Apr 2015, 137(2): 021604 (7 pages)
Published Online: April 1, 2015
Article history
Received:
August 6, 2014
Revision Received:
November 23, 2014
Online:
January 27, 2015
Citation
Kumar, D., Jain, J., Bisht, T., and Zindal, A. (April 1, 2015). "Effect of Precipitates on Mechanical and Tribological Performance of AZ91 Magnesium Alloy–Steel Couple." ASME. J. Tribol. April 2015; 137(2): 021604. https://doi.org/10.1115/1.4029248
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