Superplastic behaviour of an AZ61 alloy processed by equal channel angular extrusion

Authors

  • M. Eddahbi Departamento de Metalurgia Física, Centro Nacional de Investigaciones Metalúrgicas, CSIC
  • O. A. Ruano Departamento de Metalurgia Física, Centro Nacional de Investigaciones Metalúrgicas, CSIC

DOI:

https://doi.org/10.3989/revmetalm.2006.v42.i2.15

Keywords:

Superplasticity, Severe plastic deformation, Magnesium alloys, Microstructure

Abstract


This study is concerned with microstructural and mechanical characterization of the superplastic behaviour of a magnesium base AZ61 alloy processed by equal channel angular extrusion (ECA). Microscopic examinations showed that the microstructure after ECA was homogeneous and the grain size was about 5 mm. The extruded material showed better mechanical properties than the rolled material. The strain rate sensitivity exponent, at 250 ºC, was 0.5 at strain rates ranging from 10-4 to 5 . 10-4 s-1. Under these conditions, the maximum elongation obtained was 250 % and the microstructure remained homogeneous and stable. Furthermore, the stress strain curves showed strong strain hardening which was not attributed exclusively to dynamic grain growth.

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Published

2006-04-30

How to Cite

Eddahbi, M., & Ruano, O. A. (2006). Superplastic behaviour of an AZ61 alloy processed by equal channel angular extrusion. Revista De Metalurgia, 42(2), 146–157. https://doi.org/10.3989/revmetalm.2006.v42.i2.15

Issue

Vol. 42 No. 2 (2006)

Section

Articles

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