Dissimilar friction stir welding and post-weld heat treatment of Ti-6Al-4V and AA7075 producing joints of unprecedented strength
Dissimilar welding of Ti and Al alloys is challenging due to the potential formation of brittle intermetallics, which can compromise weld strength. Friction stir welding (FSW) is an advanced joining method with the potential to drastically reduce or prevent the formation of intermetallic phases beca...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-06-01
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| Series: | Journal of Advanced Joining Processes |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666330924000293 |
| _version_ | 1827223347926138880 |
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| author | Johannes A. Österreicher Christian Pfeiffer Georg Kunschert Thomas Weinberger Carina M. Schlögl Werner Suppan Karl M. Radlmayr |
| author_facet | Johannes A. Österreicher Christian Pfeiffer Georg Kunschert Thomas Weinberger Carina M. Schlögl Werner Suppan Karl M. Radlmayr |
| author_sort | Johannes A. Österreicher |
| collection | DOAJ |
| description | Dissimilar welding of Ti and Al alloys is challenging due to the potential formation of brittle intermetallics, which can compromise weld strength. Friction stir welding (FSW) is an advanced joining method with the potential to drastically reduce or prevent the formation of intermetallic phases because melting is avoided. However, in previous studies, dissimilar joints of Ti-6Al-4V and EN AW-7075 with satisfactory strength could not be achieved. Thus, we investigated friction stir welding of these two materials in a butt configuration, and analyzed the effects of post-weld heat treatments on the mechanical properties. Tensile strengths of 441 MPa in the as-welded condition and 505 MPa after heat treatment were achieved, significantly surpassing strength values reported in earlier studies. Microscopic investigations showed no evidence of formation of brittle intermetallic phases, and ductile fracture was observed. Our results show that FSW is a very promising candidate for future aerospace applications requiring dissimilar joining of Ti and Al alloys. |
| first_indexed | 2024-04-25T00:03:34Z |
| format | Article |
| id | doaj.art-47d297d6b3604b4b954eeac7397fd170 |
| institution | Directory Open Access Journal |
| issn | 2666-3309 |
| language | English |
| last_indexed | 2025-03-21T16:52:57Z |
| publishDate | 2024-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Advanced Joining Processes |
| spelling | doaj.art-47d297d6b3604b4b954eeac7397fd1702024-06-15T06:13:24ZengElsevierJournal of Advanced Joining Processes2666-33092024-06-019100213Dissimilar friction stir welding and post-weld heat treatment of Ti-6Al-4V and AA7075 producing joints of unprecedented strengthJohannes A. Österreicher0Christian Pfeiffer1Georg Kunschert2Thomas Weinberger3Carina M. Schlögl4Werner Suppan5Karl M. Radlmayr6Corresponding author.; LKR Light Metals Technologies, AIT Austrian Institute of Technology, Ranshofen, 5282, AustriaStirtec GmbH, Kalsdorf bei Graz, 8401, AustriaLKR Light Metals Technologies, AIT Austrian Institute of Technology, Ranshofen, 5282, AustriaStirtec GmbH, Kalsdorf bei Graz, 8401, AustriaLKR Light Metals Technologies, AIT Austrian Institute of Technology, Ranshofen, 5282, AustriaVoestalpine Metal Forming Division, Linz, 4020, AustriaVoestalpine Metal Forming Division, Linz, 4020, AustriaDissimilar welding of Ti and Al alloys is challenging due to the potential formation of brittle intermetallics, which can compromise weld strength. Friction stir welding (FSW) is an advanced joining method with the potential to drastically reduce or prevent the formation of intermetallic phases because melting is avoided. However, in previous studies, dissimilar joints of Ti-6Al-4V and EN AW-7075 with satisfactory strength could not be achieved. Thus, we investigated friction stir welding of these two materials in a butt configuration, and analyzed the effects of post-weld heat treatments on the mechanical properties. Tensile strengths of 441 MPa in the as-welded condition and 505 MPa after heat treatment were achieved, significantly surpassing strength values reported in earlier studies. Microscopic investigations showed no evidence of formation of brittle intermetallic phases, and ductile fracture was observed. Our results show that FSW is a very promising candidate for future aerospace applications requiring dissimilar joining of Ti and Al alloys.http://www.sciencedirect.com/science/article/pii/S2666330924000293FSWTitaniumAluminumAircraftJoining |
| spellingShingle | Johannes A. Österreicher Christian Pfeiffer Georg Kunschert Thomas Weinberger Carina M. Schlögl Werner Suppan Karl M. Radlmayr Dissimilar friction stir welding and post-weld heat treatment of Ti-6Al-4V and AA7075 producing joints of unprecedented strength Journal of Advanced Joining Processes FSW Titanium Aluminum Aircraft Joining |
| title | Dissimilar friction stir welding and post-weld heat treatment of Ti-6Al-4V and AA7075 producing joints of unprecedented strength |
| title_full | Dissimilar friction stir welding and post-weld heat treatment of Ti-6Al-4V and AA7075 producing joints of unprecedented strength |
| title_fullStr | Dissimilar friction stir welding and post-weld heat treatment of Ti-6Al-4V and AA7075 producing joints of unprecedented strength |
| title_full_unstemmed | Dissimilar friction stir welding and post-weld heat treatment of Ti-6Al-4V and AA7075 producing joints of unprecedented strength |
| title_short | Dissimilar friction stir welding and post-weld heat treatment of Ti-6Al-4V and AA7075 producing joints of unprecedented strength |
| title_sort | dissimilar friction stir welding and post weld heat treatment of ti 6al 4v and aa7075 producing joints of unprecedented strength |
| topic | FSW Titanium Aluminum Aircraft Joining |
| url | http://www.sciencedirect.com/science/article/pii/S2666330924000293 |
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