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Journal of Materials Science

, Volume 29, Issue 4, pp 1067–1074 | Cite as

Effect of extrusion parameters on the microstructure and properties of an Al-Li-Mg-Zr alloy

  • S. Kumar
  • H. B. McShane
  • T. Sheppard
Papers

Abstract

The effect of the extrusion temperature and the extrusion ratio on the microstructure and mechanical properties of an Al-Li-Mg-Zr alloy in the as-extruded, solution-treated and aged conditions were investigated. It was found that an increase in the extrusion temperature and ratio increased the degree of recrystallization in the extrudate. An increase in the extrusion temperature also increased the sub-grain size, whereas the extrusion ratio did not affect the sub-grain size. The strength of the extrudates decreased and the ductility increased in the asextruded condition with increases in the extrusion temperature and the extrusion ratio.

However, in the solution-treated condition, although the effect of the extrusion ratio on the mechanical properties was found to be the same as in the as-extruded condition, the trend with the extrusion temperature changes and the extrusion temperature was not simple in its influence on the mechanical properties. The fracture toughness remained almost unaffected by variation either in the extrusion temperature or the extrusion ratio.

Keywords

Polymer Microstructure Mechanical Property Recrystallization Ductility 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • S. Kumar
    • 1
  • H. B. McShane
    • 1
  • T. Sheppard
    • 1
  1. 1.Department of MaterialsImperial College Of Science, Technology and MedicineLondonUK

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