Study on Hot Working Characteristics and Deformation Response of as Cast AZ91 Mg Alloys

Authors

  • B. K. Raghunath Annamalai University, Chidambaram, TN, India
  • K. Raghukandan Annamalai University, Chidambaram, TN, India
  • R. Karthikeyan Birla Institute of Technology and Science, Dubai
  • J. Jayakumar Annamalai University, TN, India

Keywords:

AZ91 Magnesium alloy, hot workability, dynamic recrystallization, processing maps, Lyapounov function, activation energy map

Abstract

The deformation response of magnesium alloy AZ91 was investigated by means of hot compression tests. The flow curves were obtained in the temperature and strain rate range of 300–500°C and 0.001–1 s-1, respectively. The processing maps of the studied material were obtained by interpreting them on the basis of the dynamic material model. The activation energy maps were developed based on Lyapounov’s function and the safe processing zones were confirmed by comparing both the maps taking into account the largely accepted conclusions in the form of the constitutive equation that correlates flow stress, strain rate, and temperature in these materials. The flow instability between strain rates 0.31–1.0 s-1and temperature range between 300 and 480°C were studied. The optimum domains and instability zone were obtained for the hot workability of the material.

Author Biographies

  • B. K. Raghunath, Annamalai University, Chidambaram, TN, India
    Department of Manufacturing Engineering
  • K. Raghukandan, Annamalai University, Chidambaram, TN, India
    Department of Manufacturing Engineering
  • R. Karthikeyan, Birla Institute of Technology and Science, Dubai
    Department of Mechanical Engineering
  • J. Jayakumar, Annamalai University, TN, India
    PhD Scholor Department of Manufacturing Engineering

Downloads

Published

2019-04-18

Issue

Vol. 1 No. 1-3 (2011)

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.