Experimental investigations on the material behavior and formability of magnesium AZ31 sheet under warm hydroforming conditions

S. Mahabunphachai, M. Koç

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

Abstract

Use of magnesium alloys for automotives components is wildly accepted as one of the major keys for improving fuel economy. However, with the poor formability of these alloys at ambient temperature, fabrication processes at elevated temperatures of magnesium alloys are required. In this study, the material behavior and forming limits of MgAZ31 sheets are investigated at elevated temperatures and hydroforming loading conditions. Specifically, hydraulic bulge tests were carried out at elevated temperatures (room-300°C) and strain rates (0.0013 and 0.013s-1) to determine the material flow stress curves and the maximum elongation. The bulge test results showed a significant decrease in flow stress and a large increase in maximum elongation with increasing temperature and/or decreasing strain rate. In addition to the bulge tests, a set of closed-die hydroforming experiments were conducted at similar temperature range in order to determine the formability of the sheets (e.g., die filling, thinning, and corner filling). The closed-die experimental results had confirmed the significant increase in sheet formability with increasing temperature.

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition 2009, MS and T'09
Pages2299-2310
Number of pages12
Publication statusPublished - 1 Dec 2009
Externally publishedYes
EventMaterials Science and Technology Conference and Exhibition 2009, MS and T'09 - Pittsburgh, PA, United States
Duration: 25 Oct 200929 Oct 2009

Publication series

NameMaterials Science and Technology Conference and Exhibition 2009, MS and T'09
Volume4

Other

OtherMaterials Science and Technology Conference and Exhibition 2009, MS and T'09
CountryUnited States
CityPittsburgh, PA
Period25/10/0929/10/09

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Keywords

  • Bulge tests
  • Formability
  • Lightweight materials
  • Magnesium alloys
  • Warm hydroforming

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Mahabunphachai, S., & Koç, M. (2009). Experimental investigations on the material behavior and formability of magnesium AZ31 sheet under warm hydroforming conditions. In Materials Science and Technology Conference and Exhibition 2009, MS and T'09 (pp. 2299-2310). (Materials Science and Technology Conference and Exhibition 2009, MS and T'09; Vol. 4).