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dc.contributor.authorCooke, Kavian O.
dc.contributor.authorKhan, Tahir I.
dc.date.accessioned2019-06-21T16:48:16Z
dc.date.accessioned2019-06-28T10:44:20Z
dc.date.available2019-06-21T16:48:16Z
dc.date.available2019-06-28T10:44:20Z
dc.date.issued2019-06-14
dc.identifier.citationCooke KO and Khan TI (2019) Microstructure development during low-current resistance spot welding of aluminum to magnesium. Journal of Manufacturing and Materials Processing. 3(2): 46.en_US
dc.identifier.urihttp://hdl.handle.net/10454/17151
dc.descriptionYesen_US
dc.description.abstractResistance spot welding of aluminum (Al5754) to magnesium (AZ31B) alloys results in the formation of a variety of solidification microstructures and intermetallic compounds that may affect the in-service performance of the weld. This study evaluates the relationship between the welding parameters and the properties of the weld nugget that is formed, and clarifies the morphological and microstructural evolutions within the weld regions during the low-current “small-scale” resistance spot welding of Al5754 to AZ31B. The investigations included a combination of microstructural characterization and thermodynamic analysis of the weld region. The results show that the welding time and clamping force parameters have significant effects on the properties of the nugget formed. The optimal welding parameters were found to be 300 ms welding time and 800 N clamping force. Weld nuggets formed with lower welding time and clamping force were undersized and contained extensive porosity. Meanwhile, a clamping force above 800 N caused gross deformation of the test samples and the expulsion of the molten metal during the welding process. The most significant microstructural changes occurred at the weld/base metal interfaces due to the formation of Al17Mg12 and MgAl2O4 intermetallic compounds as well as significant compositional variation across the weld pool. The thermal gradient across the weld pool facilitated the formation of several microstructural transitions between equiaxed and columnar dendrites.en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttps://doi.org/10.3390/jmmp3020046en_US
dc.rights© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).en_US
dc.subjectResistance spot weldingen_US
dc.subjectDissimilar weldingen_US
dc.subjectEquiaxed grainsen_US
dc.subjectColumnar grainsen_US
dc.titleMicrostructure development during low-current resistance spot welding of aluminum to magnesiumen_US
dc.status.refereedYesen_US
dc.date.Accepted2019-06-12
dc.date.application2019-06-14
dc.typeArticleen_US
dc.type.versionPublished versionen_US
dc.date.updated2019-06-21T15:48:24Z
refterms.dateFOA2019-06-28T10:44:54Z


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