FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints
Friction stir welding (FSW) is a proven solid-state technique for joining metal alloys. Given the low melting temperatures of light alloys, excessive heat build-up in such joints may have undesirable consequences such as melting and/or undesired grain growth. It is widely recognized that the resulti...
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| مؤلفون آخرون: | , , |
| التنسيق: | conferenceObject |
| منشور في: |
2012
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| الوصول للمادة أونلاين: | http://hdl.handle.net/10725/7149 http://dx.doi.org/10.1115/IMECE2012-88943 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1750746 |
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| _version_ | 1864513481686908928 |
|---|---|
| author | Ammouri, A.H. |
| author2 | Kheireddine, A.H. Hamade, R.F. Kridli, G.T. |
| author2_role | author author author |
| author_facet | Ammouri, A.H. Kheireddine, A.H. Hamade, R.F. Kridli, G.T. |
| author_role | author |
| dc.creator.none.fl_str_mv | Ammouri, A.H. Kheireddine, A.H. Hamade, R.F. Kridli, G.T. |
| dc.date.none.fl_str_mv | 2012 2018-02-27T09:16:39Z 2018-02-27T09:16:39Z 2018-02-27 |
| dc.identifier.none.fl_str_mv | 978-0-7918-4519-6 http://hdl.handle.net/10725/7149 http://dx.doi.org/10.1115/IMECE2012-88943 Kheireddine, A. H., Ammouri, A. H., Hamade, R. F., & Kridli, G. T. (2012, November). FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints. In ASME 2012 International Mechanical Engineering Congress and Exposition (pp. 913-917). American Society of Mechanical Engineers. http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1750746 |
| dc.language.none.fl_str_mv | en |
| dc.publisher.none.fl_str_mv | ASME |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints |
| dc.type.none.fl_str_mv | Conference Paper / Proceeding info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject |
| description | Friction stir welding (FSW) is a proven solid-state technique for joining metal alloys. Given the low melting temperatures of light alloys, excessive heat build-up in such joints may have undesirable consequences such as melting and/or undesired grain growth. It is widely recognized that the resulting mechanical properties of a welded joint depends to a great extent on microstructure development. The aim of this paper is to improve the microstructure of friction stir welded aluminum alloy joints by utilizing two different cooling techniques. To this end, a 3D FEM model is developed to simulate the friction stir welding plunging and advancing phases. The parameters used in the FEM model were optimized for minimum simulation time and resulting in accurate simulations as compared with experimental results previously published by other workers. The work material was modeled as a visco-plastic material and dynamic recrystallization was implemented and added to the material model. Two main cooling techniques were compared: temperature controlled backing plate and another via cryogenic CO2 direct nozzle. The monitored output parameters were: temperature, stress, strain, and strain rate. Consequently, values of the Zener-Hollomon parameter, Z, were calculated and the resulting grain size distribution in the joint was found. Due to dynamic recrystallization, nano-sized grains were predicted to be generated in the cryogenically cooled weld line when compared to non-cooled one. |
| eu_rights_str_mv | openAccess |
| format | conferenceObject |
| id | LAURepo_c2be4c657046ffbec6d2f5f667e09e7d |
| identifier_str_mv | 978-0-7918-4519-6 Kheireddine, A. H., Ammouri, A. H., Hamade, R. F., & Kridli, G. T. (2012, November). FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints. In ASME 2012 International Mechanical Engineering Congress and Exposition (pp. 913-917). American Society of Mechanical Engineers. |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/7149 |
| publishDate | 2012 |
| publisher.none.fl_str_mv | ASME |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded jointsAmmouri, A.H.Kheireddine, A.H.Hamade, R.F.Kridli, G.T.Friction stir welding (FSW) is a proven solid-state technique for joining metal alloys. Given the low melting temperatures of light alloys, excessive heat build-up in such joints may have undesirable consequences such as melting and/or undesired grain growth. It is widely recognized that the resulting mechanical properties of a welded joint depends to a great extent on microstructure development. The aim of this paper is to improve the microstructure of friction stir welded aluminum alloy joints by utilizing two different cooling techniques. To this end, a 3D FEM model is developed to simulate the friction stir welding plunging and advancing phases. The parameters used in the FEM model were optimized for minimum simulation time and resulting in accurate simulations as compared with experimental results previously published by other workers. The work material was modeled as a visco-plastic material and dynamic recrystallization was implemented and added to the material model. Two main cooling techniques were compared: temperature controlled backing plate and another via cryogenic CO2 direct nozzle. The monitored output parameters were: temperature, stress, strain, and strain rate. Consequently, values of the Zener-Hollomon parameter, Z, were calculated and the resulting grain size distribution in the joint was found. Due to dynamic recrystallization, nano-sized grains were predicted to be generated in the cryogenically cooled weld line when compared to non-cooled one.N/AASME2018-02-27T09:16:39Z2018-02-27T09:16:39Z20122018-02-27Conference Paper / Proceedinginfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject978-0-7918-4519-6http://hdl.handle.net/10725/7149http://dx.doi.org/10.1115/IMECE2012-88943Kheireddine, A. H., Ammouri, A. H., Hamade, R. F., & Kridli, G. T. (2012, November). FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints. In ASME 2012 International Mechanical Engineering Congress and Exposition (pp. 913-917). American Society of Mechanical Engineers.http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.phphttp://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1750746eninfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/71492021-03-19T10:03:31Z |
| spellingShingle | FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints Ammouri, A.H. |
| status_str | publishedVersion |
| title | FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints |
| title_full | FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints |
| title_fullStr | FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints |
| title_full_unstemmed | FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints |
| title_short | FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints |
| title_sort | FEM analysis of the effects of cooling techniques on the microstructure of aluminum 7075 friction stir welded joints |
| url | http://hdl.handle.net/10725/7149 http://dx.doi.org/10.1115/IMECE2012-88943 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1750746 |