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
3472-3479
Zhang, Jiuwen
34c42ed0-6dad-4f0d-87bb-b4f07d8dcb6b
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, Marco J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
15 June 2010
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), .
(doi:10.1016/j.msea.2010.02.016).
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.
Text
Zhang_et_al_2010_Mater_Sci_Eng_A_(p).pdf
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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
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Local EPrints ID: 69747
URI: http://eprints.soton.ac.uk/id/eprint/69747
ISSN: 0921-5093
PURE UUID: 98c18ee9-cc25-46dd-a938-25d85bd532a6
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Date deposited: 04 Dec 2009
Last modified: 14 Mar 2024 02:45
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Author:
Jiuwen Zhang
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