Processing Fine-Grained and Superplastic AZ31 Mg Tubes for Hydroforming

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

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)289-294
Journal / PublicationKey Engineering Materials
Volume274-276
Online publishedOct 2004
Publication statusPublished - 2004
Externally publishedYes

Conference

Title7th Asia-Pacific Symposium on Engineering Plasticity and Its Applications (AEPA2004)
LocationShanghai Jiaotong University
PlaceChina
CityShanghai
Period22 - 26 September 2004

Abstract

The microstructures and mechanical properties of the AZ31 Mg tubes fabricated by one-pass forward piercing tube extrusion operated at 250-400°C and 10-2-100 s-1 are examined. The grain size is refined from the initial ∼75 μm grain size down to ∼1.5 μm. The room temperature tensile elongation along the extrusion direction also increases from ∼13% for the as-received billet up to 51%. The highest superplastic elongation of 610% was obtained as tensile loaded at 300°C and 2×10-4 s-1, and high strain rate superplasticity of 406% and 502% was achieved at 300°C and 400°C with a high strain rate of 1×10-2 s-1. Preliminary hydroforming or tube bulging at room temperature has demonstrated the feasibility. Hydrofoming at elevated temperature of 200°C or above should exhibit much more promising results, utilizing the capability of LTSP and HSRSP of the extruded tubes.

Research Area(s)

  • Fine grain size, Mg alloys, Superplasticity, Tube hydroforming

Citation Format(s)

Processing Fine-Grained and Superplastic AZ31 Mg Tubes for Hydroforming. / Huang, C. C.; Huang, J. C.; Lin, Y. K.; Hwang, Y. M.

In: Key Engineering Materials, Vol. 274-276, 2004, p. 289-294.

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