Compressive strength and hot deformation behavior of TX32 magnesium alloy with 0.4% Al and 0.4% Si additions

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

Authors

  • K. P. Rao
  • Y. V.R.K. Prasad
  • K. Suresh
  • C. Dharmendra
  • N. Hort
  • K. U. Kainer

Mg-3Sn-2Ca (TX32) alloy has good corrosion and creep resistance although its strength is inferior to AZ31 alloy. In this paper, the influence of additions of 0.4%A1 and 0.4%Si on the compressive strength and hot working characteristics of TX32 is reported. Although the room temperature compressive strength improved marginally with the alloying additions, the drop in higher-temperature strength is significant. By comparing with the alloy having only 0.4% Al, it is clear that the Si addition is responsible for this deterioration. The hot working behavior as characterized by processing maps revealed that TX32 exhibits two domains of dynamic recrystallization occurring in the temperature and strain rate ranges: (1) 300 - 350°C and 0.0003 - 0.001 s-1 and (2) 390-500°C and 0.005-0.6 s-1. In Al and Si containing TX32, both the domains moved to higher temperatures and the flow instability is reduced improving the hot workability. In both the domains, the apparent activation energy is higher than that for self-diffusion in magnesium implying that there is a significant contribution from the back stress generated by the hard particles present in the matrix.

Original languageEnglish
Title of host publicationMagnesium Technology 2011 - Held During TMS 2011 Annual Meeting and Exhibition
EditorsWim H. Sillekens, Sean R. Agnew, Neale R. Neelameggham, Suveen N. Mathaudhu
Number of pages6
PublisherThe Minerals, Metals & Materials Society
Publication date2011
Pages169-174
ISBN (print)9781118029367
ISBN (electronic)9781118062029
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event140th Annual Meeting and Exhibition of Magnesium Technology 2011 - TMS 2011 - San Diego, CA, United States
Duration: 27.02.201103.03.2011
Conference number: 140
https://www.tms.org/Meetings/Annual-11/AM11home.aspx

Bibliographical note

Copyright © 2011 The Minerals, Metals & Materials Society. All rights reserved.

    Research areas

  • Compressive strength, Hot workability, Kinetic analysis, Mg-Sn-Ca-Al-Si alloy, Processing maps
  • Engineering