Mechanical properties and microstructure of AZ31B magnesium alloy processed by I-ECAP.

Hdl Handle:
http://hdl.handle.net/10545/622167
Title:
Mechanical properties and microstructure of AZ31B magnesium alloy processed by I-ECAP.
Authors:
Gzyl, Michal; Rosochowski, Andrzej; Pesci, Raphael; Olejnik, Lech; Yakushina, Evgenia; Wood, Paul
Abstract:
Incremental equal channel angular pressing (I-ECAP) is a severe plastic deformation process used to refine grain size of metals, which allows processing very long billets. As described in the current article, an AZ31B magnesium alloy was processed for the first time by three different routes of I-ECAP, namely, A, BC, and C, at 523 K (250 C). The structure of the material was homogenized and refined to ~5 microns of the average grain size, irrespective of the route used. Mechanical properties of the I-ECAPed samples in tension and compression were investigated. Strong influence of the processing route on yield and fracture behavior of the material was established. It was found that texture controls the mechanical properties of AZ31B magnesium alloy subjected to I-ECAP. SEM and OM techniques were used to obtain microstructural images of the I-ECAPed samples subjected to tension and compression. Increased ductility after I-ECAP was attributed to twinning suppression and facilitation of slip on basal plane. Shear bands were revealed in the samples processed by I-ECAP and subjected to tension. Tension– compression yield stress asymmetry in the samples tested along extrusion direction was suppressed in the material processed by routes BC and C. This effect was attributed to textural development and microstructural homogenization. Twinning activities in fine- and coarsegrained samples have also been studied.
Affiliation:
University of Strathclyde; ENSAM-Arts et Métiers ParisTech; Warsaw University of Technology
Citation:
Gzyl, M. et al (2013) 'Mechanical Properties and Microstructure of AZ31B Magnesium Alloy Processed by I-ECAP', Metallurgical and Materials Transactions A, 45 (3):1609 .
Publisher:
Springer
Journal:
Metallurgical and Materials Transactions A
Issue Date:
7-Nov-2013
URI:
http://hdl.handle.net/10545/622167
DOI:
10.1007/s11661-013-2094-z
Additional Links:
http://link.springer.com/10.1007/s11661-013-2094-z
Type:
Article
Language:
en
ISSN:
10735623
EISSN:
15431940
Sponsors:
Financial support from the Carpenter Technology Corporation Part of this research was supported by the Engineering and Physical Sciences Research Council [Grant Number EP/G03477X/1].
Appears in Collections:
Institute for Innovation in Sustainable Engineering

Full metadata record

DC FieldValue Language
dc.contributor.authorGzyl, Michalen
dc.contributor.authorRosochowski, Andrzejen
dc.contributor.authorPesci, Raphaelen
dc.contributor.authorOlejnik, Lechen
dc.contributor.authorYakushina, Evgeniaen
dc.contributor.authorWood, Paulen
dc.date.accessioned2018-02-19T11:02:10Z-
dc.date.available2018-02-19T11:02:10Z-
dc.date.issued2013-11-07-
dc.identifier.citationGzyl, M. et al (2013) 'Mechanical Properties and Microstructure of AZ31B Magnesium Alloy Processed by I-ECAP', Metallurgical and Materials Transactions A, 45 (3):1609 .en
dc.identifier.issn10735623-
dc.identifier.doi10.1007/s11661-013-2094-z-
dc.identifier.urihttp://hdl.handle.net/10545/622167-
dc.description.abstractIncremental equal channel angular pressing (I-ECAP) is a severe plastic deformation process used to refine grain size of metals, which allows processing very long billets. As described in the current article, an AZ31B magnesium alloy was processed for the first time by three different routes of I-ECAP, namely, A, BC, and C, at 523 K (250 C). The structure of the material was homogenized and refined to ~5 microns of the average grain size, irrespective of the route used. Mechanical properties of the I-ECAPed samples in tension and compression were investigated. Strong influence of the processing route on yield and fracture behavior of the material was established. It was found that texture controls the mechanical properties of AZ31B magnesium alloy subjected to I-ECAP. SEM and OM techniques were used to obtain microstructural images of the I-ECAPed samples subjected to tension and compression. Increased ductility after I-ECAP was attributed to twinning suppression and facilitation of slip on basal plane. Shear bands were revealed in the samples processed by I-ECAP and subjected to tension. Tension– compression yield stress asymmetry in the samples tested along extrusion direction was suppressed in the material processed by routes BC and C. This effect was attributed to textural development and microstructural homogenization. Twinning activities in fine- and coarsegrained samples have also been studied.en
dc.description.sponsorshipFinancial support from the Carpenter Technology Corporation Part of this research was supported by the Engineering and Physical Sciences Research Council [Grant Number EP/G03477X/1].en
dc.language.isoenen
dc.publisherSpringeren
dc.relation.urlhttp://link.springer.com/10.1007/s11661-013-2094-zen
dc.rightsArchived with thanks to Metallurgical and Materials Transactions Aen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectMagnesium alloyen
dc.subjectShear banden
dc.subjectBasal planeen
dc.subjectEqual channel angular pressingen
dc.subjectBasal slipen
dc.titleMechanical properties and microstructure of AZ31B magnesium alloy processed by I-ECAP.en
dc.typeArticleen
dc.identifier.eissn15431940-
dc.contributor.departmentUniversity of Strathclydeen
dc.contributor.departmentENSAM-Arts et Métiers ParisTechen
dc.contributor.departmentWarsaw University of Technologyen
dc.identifier.journalMetallurgical and Materials Transactions Aen
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