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The effect of initial grain size on formability of AZ31B magnesium alloy during I-ECAP

Gzyl, Michal Zbigniew and Rosochowski, Andrzej and Olejnik, Lech and Reshetov, Aleksey (2014) The effect of initial grain size on formability of AZ31B magnesium alloy during I-ECAP. Key Engineering Materials, 611-612. pp. 573-580. ISSN 1013-9826

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Abstract

The goal of this work was to investigate formability of AZ31B magnesium alloy during incremental equal channel angular pressing (I-ECAP). Square billets were processed using different routes of I-ECAP at temperatures varying from 125 °C to 250 °C. The billets were obtained from commercially available coarse-grained, hot-extruded rod and fine-grained, hot-rolled plate. A strong influence of the initial microstructure on processing temperature was reported. Fine-grained samples were successfully processed at 200 °C, while coarse-grained ones must have been heated up to 250 °C to avoid fracture. A gradual temperature decrease with subsequent passes allowed successful pressing at 150 °C. Processing using various routes of I-ECAP showed that a billet rotation before the last pass had strong influence on mechanical properties. The results of experiments were plotted on the diagram of allowable processing temperature for AZ31B. It was found that the relation between the minimum temperature in I-ECAP and the initial grain size could be described by a logarithmic equation.

Item type: Article
ID code: 48142
Keywords: magnesium alloys, equal channel angular pressing , ultrafine grained metals, Engineering design, Manufactures, Mechanics of Materials, Materials Science(all), Mechanical Engineering
Subjects: Technology > Engineering (General). Civil engineering (General) > Engineering design
Technology > Manufactures
Department: Faculty of Engineering > Design, Manufacture and Engineering Management
Depositing user: Pure Administrator
Date deposited: 19 May 2014 15:24
Last modified: 17 Feb 2019 16:51
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URI: https://strathprints.strath.ac.uk/id/eprint/48142
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