An experimental study on the stability of superplastic deformation of AZ31 Mg alloy

F. K. Abu-Farha, M. A. Nazzal, M. K. Khraisheh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Optimum variable strain rate forming paths based on two different multiscale deformation-based stability criteria were developed. These criteria account for both geometrical necking (macroscopic feature) and microstructural evolution. In the first criterion, we defined the onset of instability using Hart's stability analysis, where a linear perturbation in a small region along the tensile specimen is introduced. In the second criterion, we introduced a modified one dimensional nonlinear long wavelength analysis, based on the one introduced by Hutchinson and Neale [5]. The two stability criteria are calibrated for the AZ31 magnesium alloy at 400°C, yielding two different variable strain rate forming paths. Uniaxial tensile tests are carried out following the derived forming paths to examine the validity of both criteria. Results show that the linear approach underestimates the amount of uniform deformation, and therefore prolongs the forming time to prevent failure compared to the nonlinear analysis.

Original languageEnglish
Title of host publication10TH ESAFORM CONFERENCE ON MATERIAL FORMING
Pages1289-1294
Number of pages6
Publication statusPublished - 11 May 2007
Event10TH ESAFORM CONFERENCE ON MATERIAL FORMING - Zaragoza, Spain
Duration: 18 Apr 200620 Apr 2006

Publication series

NameAIP Conference Proceedings
Volume907
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other10TH ESAFORM CONFERENCE ON MATERIAL FORMING
CountrySpain
CityZaragoza
Period18/4/0620/4/06

    Fingerprint

Keywords

  • Magnesium
  • Stability analysis
  • Superplastic forming
  • Tensile testing

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Abu-Farha, F. K., Nazzal, M. A., & Khraisheh, M. K. (2007). An experimental study on the stability of superplastic deformation of AZ31 Mg alloy. In 10TH ESAFORM CONFERENCE ON MATERIAL FORMING (pp. 1289-1294). (AIP Conference Proceedings; Vol. 907).