Study of hot forging behavior of as-cast Mg-3Al-1Zn-2Ca alloy towards optimization of its hot workability

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

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

Detail(s)

Original languageEnglish
Pages (from-to)697-704
Journal / PublicationMaterials and Design
Volume57
Online published23 Jan 2014
Publication statusPublished - May 2014

Abstract

Mg-3Al-1Zn-2Ca (AZX312) alloy has been forged in the temperature range of 350-500°C and at speeds in the range of 0.01-10mms-1 to produce a rib-web shape with a view to validate the processing map and study the microstructural development. The process was simulated through finite-element method to estimate the local and average strain rate ranges in the forging envelope. The processing map exhibited two domains in the following ranges: (1) 350-450°C/0.0003-0.05s-1 and (2) 450-500°C/0.03-0.7s-1 and these represent dynamic recrystallization (DRX) and intercrystalline cracking, respectively. The optimal workability condition according to the processing map is 425-450°C/0.001-0.01s-1. A wide flow instability regime occurred at higher strain rates diagonally across the map, which caused flow localization that should be avoided in forming this alloy. The experimental load-stroke curves correlated well with the simulated ones and the observed microstructural features in the forged components matched with the ones predicted by the processing map. © 2014 Elsevier Ltd.

Research Area(s)

  • Ca addition, Hot forging, Magnesium alloy, Processing map