Investigation of hot workability behavior of as-cast Mg–5Sn–2Ca (TX52) magnesium alloy through processing map

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

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

The hot deformation behavior of TX52 has been studied with a processing map developed on the basis of its temperature and strain rate dependence of flow stress. The map exhibits two domains of dynamic recrystallization in the ranges of (1) 300–410 °C/0.0003–0.003 s−1 and (2) 440–550 °C/0.02–10 s−1. Kinetic analysis gives apparent activation energy values of 191 and 198 kJ/mol in Domains 1 and 2, respectively. These values are higher than self-diffusion in Mg signifying that substantial back stress is being generated due to the large volume fraction of intermetallic particles in the matrix. In Domain 1, basal + prismatic slip occurs with recovery by climb, while at higher temperatures (Domain 2) second-order pyramidal slip occurs with simultaneous softening by cross-slip. Domain 2 is recommended for maximizing workability and Domain 1 for finishing steps to achieve finer grain size in the final product.

Original languageEnglish
JournalProduction and Manufacturing Research
Volume2
Issue number1
Pages (from-to)241-252
Number of pages12
ISSN2169-3277
DOIs
Publication statusPublished - 01.01.2014
Externally publishedYes

    Research areas

  • activation energy, dynamic recrystallization, hot workability, Mg–Sn–Ca alloy, processing map
  • Engineering