Characterization and Mechanical Behavior of Sintered Al-Mg Powders

Authors

  • M Sivaraj Department of Mechanical Engineering, Institute of technology, Hawassa University, Ethiopia.
  • S. Rajkumar Department of Mechanical Engineering, Hawassa University, Hawassa,
  • Ramesh Rudrapati Department of Mechanical Engineering, Hawassa University, Hawassa,
  • S. Muthuraman Department of Mechanical Engineering, Higher College of Technology, Muscat,

DOI:

https://doi.org/10.37591/tmd.v6i1.2628

Keywords:

Sintering, Al-Mg powders, mechanical properties, Densities

Abstract

The resolution of the work is to relate the characterization and mechanical properties for argon atomized Al-1wt%Mg powders through and not through lubricant 1 wt% graphite. Pure nitrogen sintering was accomplished and the effect of sintering atmosphere for the mixed Al-1%Mg powder compacts was examined. One weight percent graphite was premixed with the powder as a lubricant for the first set samples. However, no graphite was used for the second set specimens. As a sintering aid, 1wt% Mg was enhanced for both group materials. Compaction of the specimens was achieved using a hand operated hydraulic press and a floating rectangular die. First set specimens were pressed to green densities of 92.5 and 93.5% by pressures of 440 and 495 MPa, respectively. In the second set (no graphite) samples, 94% green density was achieved using the similar compaction pressures. Sintering and de-lubrication ensured in a horizontal tube furnace with a high purity nitrogen atmosphere. Green & theoretical density increased with the increment of compaction pressure. Residual macro & micro porosity was present in all sintered samples under every sintering condition. Average sized pores and small interrelated micro-pores at grain boundaries were observable when lubricant was enhanced which reduced the sintered densities due to a wide burn off range leaving residual porosity.

 

References

M. Sivaraj, S. Rajkumar, Ramesh Rudrapati, S. Muthuraman. Characterization and Mechanical Behavior of Sintered

Al-Mg Powders. Trends in Machine Design. 2019; 6(1): 1–7p.

Downloads

Published

2019-06-01

Issue

Vol. 6 No. 1 (2019)

Section

Articles

License

Declaration and Copyright Transfer Form

(to be completed by authors)

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

  • I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.
  • I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).
  • I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.
  •  I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. ________________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.