Influencing the Gradient of Material Properties by Gradation Extrusion

Designing material characteristics by grain refinement using Severe Plastic Deformation (SPD) is an attractive way to create outstanding material properties. This paper presents a unique method which combines SPD and impact extrusion. The extrusion die is designed to create additional material defor...

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Bibliographic Details
Published inApplied Mechanics and Materials Vol. 794; no. Progress in Production Engineering; pp. 166 - 173
Main Authors Sterzing, Andreas, Landgrebe, Dirk, Bergmann, Markus
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 05.10.2015
Subjects
Extrusion
Impact extrusion
Mathematical analysis
Mathematical models
Microstructure
Plastic deformation
Strain
Forming
Severe Plastic Deformation
Metal
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Summary:Designing material characteristics by grain refinement using Severe Plastic Deformation (SPD) is an attractive way to create outstanding material properties. This paper presents a unique method which combines SPD and impact extrusion. The extrusion die is designed to create additional material deformation to a defined depth, resulting in a gradient from ultra-fine grained to coarse grained microstructure. Due to the large gradient the method is called gradation extrusion. The paper presents a new analytical calculation method and a numerical evaluation of the strain, showing the relationship between tool design and achievable effects and provides initial experimental results.
Bibliography:Selected, peer reviewed papers from the 2015 WGP Congress, September 7-8, 2015, Hamburg, Germany
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ISBN:9783038356165
3038356166
ISSN:1660-9336
1662-7482
1662-7482
DOI:10.4028/www.scientific.net/AMM.794.166