Effect of ECAP on Microstructure and Wear Resistance of AZ91 Magnesium Alloy

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Authors

  • Rajesh Yandigeri
     Department of Mechanical Engineering, Ramaiah Institute of Technology, Bengaluru 560054, Karnataka ,IN
  • Paresh S. V.
     Department of Mechanical Engineering, Ramaiah Institute of Technology, Bengaluru 560054, Karnataka ,IN
  • C. Siddaraju
     Department of Mechanical Engineering, Ramaiah Institute of Technology, Bengaluru 560054, Karnataka ,IN
  • Niranjan C. A.
     Department of Industrial Engineering and Management, Ramaiah Institute of Technology, Bengaluru 560054, Karnataka ,IN

DOI:

https://doi.org/10.18311/jmmf/2023/33357

Keywords:

Microstructure, Wear Resistance, Machinability, Microhardness, Homogenized, ECAP

Abstract

The present study aims to enhance the hardness and wear resistance of AZ91 Magnesium (Mg) alloy using Equal Channel Angular Pressing [ECAP]. Specimens were initially prepared using the die casting technique and were homogenized at 420°C for 24 hours. Both homogenized and non-homogenized specimens were subjected to an ECAP single pass under different temperatures. A Scanning Electron Microscope was used to study the influence of die heating temperature on the microstructure of AZ91 Mg alloy. A reciprocating wear test was carried out using the weight loss method to analyse the importance of ECAP on wear resistance. Results revealed that the microhardness and wear resistance of AZ91 were found to have increased after ECAP. Homogenization of specimens showed improved properties compared to nonhomogenized specimens. Grain refinement was observed in both homogenized and non-homogenized samples. Cracks were observed on the ECAPed specimen when the ECAP temperature was maintained at 435°C–455°C. Overall, ECAP caused grain refinement, increased hardness and wear resistance in the AZ91 Mg alloy.

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Published

2023-04-12

How to Cite

Yandigeri, R., Paresh S. V., C. Siddaraju, & Niranjan C. A. (2023). Effect of ECAP on Microstructure and Wear Resistance of AZ91 Magnesium Alloy. Journal of Mines, Metals and Fuels, 71(1), 57–66. https://doi.org/10.18311/jmmf/2023/33357

Issue

Volume 71, Issue 1, January 2023

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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