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Al-Mg-Cu based alloys and pure Al processed by high pressure torsion: the influence of alloying additions on strengthening

Al-Mg-Cu based alloys and pure Al processed by high pressure torsion: the influence of alloying additions on strengthening
Al-Mg-Cu based alloys and pure Al processed by high pressure torsion: the influence of alloying additions on strengthening
The influence of alloying additions on strengthening on high pressure torsion (HPT) processed alloys was investigated using commercially pure Al (Al-1050 alloy) and five Al-(1-3)Mg-(0-4)Cu alloys (in wt%). Microhardness was measured on cross sections. For Al-1050 the microhardness reaches a peak at an effective strain of about 3 and subsequently decreases. The microhardness of Al-Mg-Cu alloys increases strongly and continuously with increasing equivalent strain. This workhardening rate is enhanced by increasing Mg content over the entire range of strain. Furthermore, the workhardening rates were higher in Cu-free and low Cu-containing (? 0.4%) Al-Mg alloys as compared to high Cu-containing Al-Mg alloy at strains less than 3. A model is presented that describes the experimental results well. The strengthening model indicates that dislocation-solute and dislocation-cluster interactions play an important role.
hpt, high pressure torsion, spd, tem, electron microscopy, dislocations, geometrically necessary dislocations, gnd, co-clusters, work hardening, strain gradient, hardness, Al-Mg, Al-Li, Al-Cu-Mg, 2024, aerospace alloy
0921-5093
3472-3479
Zhang, Jiuwen
34c42ed0-6dad-4f0d-87bb-b4f07d8dcb6b
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, Marco J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Zhang, Jiuwen
34c42ed0-6dad-4f0d-87bb-b4f07d8dcb6b
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, Marco J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51

Zhang, Jiuwen, Gao, Nong and Starink, Marco J. (2010) Al-Mg-Cu based alloys and pure Al processed by high pressure torsion: the influence of alloying additions on strengthening. Materials Science and Engineering: A, 527 (15), 3472-3479. (doi:10.1016/j.msea.2010.02.016).

Record type: Article

Abstract

The influence of alloying additions on strengthening on high pressure torsion (HPT) processed alloys was investigated using commercially pure Al (Al-1050 alloy) and five Al-(1-3)Mg-(0-4)Cu alloys (in wt%). Microhardness was measured on cross sections. For Al-1050 the microhardness reaches a peak at an effective strain of about 3 and subsequently decreases. The microhardness of Al-Mg-Cu alloys increases strongly and continuously with increasing equivalent strain. This workhardening rate is enhanced by increasing Mg content over the entire range of strain. Furthermore, the workhardening rates were higher in Cu-free and low Cu-containing (? 0.4%) Al-Mg alloys as compared to high Cu-containing Al-Mg alloy at strains less than 3. A model is presented that describes the experimental results well. The strengthening model indicates that dislocation-solute and dislocation-cluster interactions play an important role.

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Zhang_et_al_2010_Mater_Sci_Eng_A_(p).pdf - Accepted Manuscript
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More information

Published date: 15 June 2010
Keywords: hpt, high pressure torsion, spd, tem, electron microscopy, dislocations, geometrically necessary dislocations, gnd, co-clusters, work hardening, strain gradient, hardness, Al-Mg, Al-Li, Al-Cu-Mg, 2024, aerospace alloy
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 69747
URI: http://eprints.soton.ac.uk/id/eprint/69747
ISSN: 0921-5093
PURE UUID: 98c18ee9-cc25-46dd-a938-25d85bd532a6
ORCID for Nong Gao: ORCID iD orcid.org/0000-0002-7430-0319

Catalogue record

Date deposited: 04 Dec 2009
Last modified: 14 Mar 2024 02:45

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Contributors

Author: Jiuwen Zhang
Author: Nong Gao ORCID iD

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