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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.45  No.7 (2004)  >  pp.2192-2199

MATERIALS TRANSACTIONS
<<Previous article Vol.45  No.7 (2004)   pp.2192 - 2199 Next article>>

The Effect of Warm Equal Channel Angular Extrusion on Ductility and Twinning in Magnesium Alloy ZK60

Rimma Lapovok1), Peter F. Thomson1), Ryan Cottam1) and Y. Estrin2)
1) School of Physics and Materials Engineering, Monash University
2) IWW, TU Clausthal


Tensile ductility of magnesium alloy ZK60 pre-strained by warm equal channel angular extrusion (ECAE) was investigated at 300°C. It was shown that a significant ductility (262%) is achievable with this technique for a fairly high strain rate of 3·10−3 s−1. The effect of pre-straining by warm ECAE on twinning under room temperature deformation was also investigated. It was shown that a bi-modal grain structure, whose characteristics are determined by the ECAE route, number of passes and temperature, has a strong effect on the propensity for twinning and mechanical properties, including ductility.


Keyword:
equal channel angular extrusion (ECAE), ZK60, tensile ductility, twinning

Received: January 13, 2004
Accepted: March 29, 2004 , Published online: June 24, 2005
Copyright (c) 2005 The Japan Institute of Metals

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