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Processing magnesium and its alloys by high-pressure torsion: an overview

Processing magnesium and its alloys by high-pressure torsion: an overview
Processing magnesium and its alloys by high-pressure torsion: an overview
Magnesium and its alloys have attracted significant attention in recent years because they display high strength‐to‐density ratios, they are biodegradable and they provide a potential for hydrogen storage. Many investigations have examined the effect of high‐pressure torsion processing on the microstructures and properties of these materials so that numerous reports are now available. This overview provides a summary of the observations reported to date on the structure and mechanical property evolution including the nature of grain refinement, the grain boundary misorientation distributions, texture evolution, and the minimum grain size. For convenience, the mechanical properties are separated into hardness, tensile behavior, and superplastic properties. It is shown that the mechanism of grain refinement differs from other metallic materials processed by severe plastic deformation but high strength may be achieved in magnesium alloys and exceptional ductility in pure magnesium. Hydrogen storage and corrosion behavior are also examined together with a discussion of recent attempts to produce magnesium‐based nanocomposites through processing by high‐pressure torsion.
High-pressure Torsion, MAGNESIUM, Mechanical Properties, Microstructure, Severe plastic deformation
1438-1656
1-15
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Figueiredo, Roberto B. and Langdon, Terence G. (2019) Processing magnesium and its alloys by high-pressure torsion: an overview. Advanced Engineering Materials, 21 (1), 1-15, [1801039]. (doi:10.1002/adem.201801039).

Record type: Article

Abstract

Magnesium and its alloys have attracted significant attention in recent years because they display high strength‐to‐density ratios, they are biodegradable and they provide a potential for hydrogen storage. Many investigations have examined the effect of high‐pressure torsion processing on the microstructures and properties of these materials so that numerous reports are now available. This overview provides a summary of the observations reported to date on the structure and mechanical property evolution including the nature of grain refinement, the grain boundary misorientation distributions, texture evolution, and the minimum grain size. For convenience, the mechanical properties are separated into hardness, tensile behavior, and superplastic properties. It is shown that the mechanism of grain refinement differs from other metallic materials processed by severe plastic deformation but high strength may be achieved in magnesium alloys and exceptional ductility in pure magnesium. Hydrogen storage and corrosion behavior are also examined together with a discussion of recent attempts to produce magnesium‐based nanocomposites through processing by high‐pressure torsion.

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RBF-AEM-November2018 - Accepted Manuscript
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More information

Accepted/In Press date: 8 November 2018
e-pub ahead of print date: 19 December 2018
Published date: January 2019
Keywords: High-pressure Torsion, MAGNESIUM, Mechanical Properties, Microstructure, Severe plastic deformation

Identifiers

Local EPrints ID: 426686
URI: http://eprints.soton.ac.uk/id/eprint/426686
ISSN: 1438-1656
PURE UUID: 3ae65ef0-483d-4e6a-b2b8-f762b8d365c8
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

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Date deposited: 10 Dec 2018 17:31
Last modified: 26 Nov 2021 06:48

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Contributors

Author: Roberto B. Figueiredo

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