Experimental and numerical investigations of superplastic deformation mechanisms

N. Chandra, K. Murali, H. Garmestani

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Experimental and numerical investigations of superplastic deformation are being carried out in order to understand the underlying mechanisms of deformation in low (conventional) and high strain-rate ranges. The experimental analysis consists of analyzing the microstructure using Backscattered Kikuchi Diffraction (BKD) method and relating it to the various mechanisms of superplastic deformation. The numerical investigation consists of developing a micromechanical model of superplastic deformation from the constituent grain level to the level of the polycrystalline aggregate. This model uses the self-consistent method to evaluate the grain to grain variation of stress during superplastic deformation. It is applied to statically recrystallized 7475 aluminum alloy and dynamically recrystallizing SUPRAL and the influence of temperature on the flow stress vs. strain rate behavior is successfully predicted.

Original languageEnglish (US)
Pages (from-to)47-52
Number of pages6
JournalMaterials Science Forum
Volume170-172
DOIs
StatePublished - 1994
Externally publishedYes
EventProceedings of the 1994 International Conference on Superplasticity in Advanced Materials (ICSAM-94) - Moscow, Russia
Duration: May 24 1994May 26 1994

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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