Flat hardness distribution in AA6061 joints by linear friction welding
Abstract It is known that one of the main concerns associated with the conventional welding of precipitation-strengthened Al alloys is the formation of softening regions, resulting in the deterioration of mechanical properties. In this study, we show that linear friction welding (LFW) can completely...
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2021-06-01
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Series: | Scientific Reports |
Online Access: | https://doi.org/10.1038/s41598-021-91249-5 |
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doaj-b75da6fc65214264b5bda8102613eb942021-06-06T11:35:05ZengNature Publishing GroupScientific Reports2045-23222021-06-011111710.1038/s41598-021-91249-5Flat hardness distribution in AA6061 joints by linear friction weldingJeong-Won Choi0Weihao Li1Kohsaku Ushioda2Hidetoshi Fujii3Joining and Welding Research Institute, Osaka UniversityJoining and Welding Research Institute, Osaka UniversityJoining and Welding Research Institute, Osaka UniversityJoining and Welding Research Institute, Osaka UniversityAbstract It is known that one of the main concerns associated with the conventional welding of precipitation-strengthened Al alloys is the formation of softening regions, resulting in the deterioration of mechanical properties. In this study, we show that linear friction welding (LFW) can completely suppress softening regions in precipitation-strengthened AA6061-T6 alloy by introducing a large shear strain and by controlling the interfacial temperature. We found that the LFW process resulted in an extremely low interfacial temperature; it decreased as the applied pressure increased from 50 to 240 MPa. This approach can essentially suppress both softening and hardening regions, leading to uniform hardness distribution in Al joints. The high-pressure LFW process demonstrated here can thus provide an innovated guidance to obtain high-performance Al alloy joints and be extended to other precipitation-strengthened Al alloys, which undergo high-temperature softening.https://doi.org/10.1038/s41598-021-91249-5 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jeong-Won Choi Weihao Li Kohsaku Ushioda Hidetoshi Fujii |
spellingShingle |
Jeong-Won Choi Weihao Li Kohsaku Ushioda Hidetoshi Fujii Flat hardness distribution in AA6061 joints by linear friction welding Scientific Reports |
author_facet |
Jeong-Won Choi Weihao Li Kohsaku Ushioda Hidetoshi Fujii |
author_sort |
Jeong-Won Choi |
title |
Flat hardness distribution in AA6061 joints by linear friction welding |
title_short |
Flat hardness distribution in AA6061 joints by linear friction welding |
title_full |
Flat hardness distribution in AA6061 joints by linear friction welding |
title_fullStr |
Flat hardness distribution in AA6061 joints by linear friction welding |
title_full_unstemmed |
Flat hardness distribution in AA6061 joints by linear friction welding |
title_sort |
flat hardness distribution in aa6061 joints by linear friction welding |
publisher |
Nature Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2021-06-01 |
description |
Abstract It is known that one of the main concerns associated with the conventional welding of precipitation-strengthened Al alloys is the formation of softening regions, resulting in the deterioration of mechanical properties. In this study, we show that linear friction welding (LFW) can completely suppress softening regions in precipitation-strengthened AA6061-T6 alloy by introducing a large shear strain and by controlling the interfacial temperature. We found that the LFW process resulted in an extremely low interfacial temperature; it decreased as the applied pressure increased from 50 to 240 MPa. This approach can essentially suppress both softening and hardening regions, leading to uniform hardness distribution in Al joints. The high-pressure LFW process demonstrated here can thus provide an innovated guidance to obtain high-performance Al alloy joints and be extended to other precipitation-strengthened Al alloys, which undergo high-temperature softening. |
url |
https://doi.org/10.1038/s41598-021-91249-5 |
work_keys_str_mv |
AT jeongwonchoi flathardnessdistributioninaa6061jointsbylinearfrictionwelding AT weihaoli flathardnessdistributioninaa6061jointsbylinearfrictionwelding AT kohsakuushioda flathardnessdistributioninaa6061jointsbylinearfrictionwelding AT hidetoshifujii flathardnessdistributioninaa6061jointsbylinearfrictionwelding |
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