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Effect of severe plastic deformation on an extruded ZK60 magnesium alloy

Published online by Cambridge University Press:  07 July 2016

Florina D. Dumitru ,
György Deák ,
Oscar F. Higuera-Cobos  and
José M. Cabrera-Marrero
Florina D. Dumitru
Affiliation:
National Institute for Research and Development in Environmental Protection, 294 Splaiul Independentei, 060031, Bucharest, Romania.
György Deák
Affiliation:
National Institute for Research and Development in Environmental Protection, 294 Splaiul Independentei, 060031, Bucharest, Romania.
Oscar F. Higuera-Cobos
Affiliation:
Facultad de Ingeniería, Ingeniería Mecánica, Universidad del Atlántico, Barranquilla, Colombia.
José M. Cabrera-Marrero
Affiliation:
Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica, Universidad Politécnica de Cataluña, Av. Diagonal 647, 08028 – Barcelona, España. Fundación CTM Centre Tecnológic, Plaça de la Ciència 2, 08243, Manresa, España.
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Abstract

Equal channel angular pressing (ECAP) was carried out on extruded ZK60 magnesium alloy until an equivalent strain of ∼4 (corresponding to 4 passes) at 523K following route Bc. The effect of the deformation on both microstructure and texture was investigated by analysis of inverse pole figures and pole figures respectively, determined by EBSD. Additionaly, the mechanical properties were evaluated through tensile tests. The ECAPed processed ZK60 alloy showed the presence of dynamic recrystallization (DRX) process, correlated with a strong basal fiber texture. The presence of pyramidal slip was also observed, which can be correlated with the presence on twin-oriented boundaries in the material. Both the grain size reduction and the existence of texture influenced the ductility of the magnesium alloy processed by ECAP, as the ductility of the ZK60 alloy after four ECAP passes increased two times in comparation with the initial (un-processed) material.

Keywords

Mgtextureductility
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1818 , 07 July 2016 , imrc2015s4g-p004
Copyright
Copyright © Materials Research Society 2016

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