Impact of selective grain refinement on superplastic deformation

Finite element analysis

Mohammad A. Nazzal, Marwan Khraisheh

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Recently, Friction Stir Processing has been introduced as an effective tool to refine the grain structure of sheet metals and enhance their superplasticity. A possible application of friction stir processing is selective grain refinement to enhance deformation uniformity and minimize localized thinning. This selective treatment will result in a sheet with grain size gradient. Very limited studies have been directed toward investigating the effect of grain size gradient on the superplastic deformation during SPF. In this work, Finite Element simulations for the free bulging of a dome made of 7075Al alloy were conducted to examine the effects of initial grain size gradient within the sheet on SPF characteristics. The results clearly demonstrate that selective grain refinement can be utilized to eliminate severe thinning and improve the integrity of the superplastic formed part.

Original languageEnglish
Pages (from-to)163-167
Number of pages5
JournalJournal of Materials Engineering and Performance
Volume17
Issue number2
DOIs
Publication statusPublished - 1 Apr 2008
Externally publishedYes

Fingerprint

Superplastic deformation
Grain refinement
Friction
Finite element method
Superplasticity
Crystal microstructure
Domes
Sheet metal
Processing

Keywords

  • Finite element analysis
  • Selective grain refinement
  • Superplastic forming

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Impact of selective grain refinement on superplastic deformation : Finite element analysis. / Nazzal, Mohammad A.; Khraisheh, Marwan.

In: Journal of Materials Engineering and Performance, Vol. 17, No. 2, 01.04.2008, p. 163-167.

Research output: Contribution to journalArticle

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