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In order to perform a comparative weldability analysis, the welds were performed using similar welding procedures. Similar welds in aluminium (5754-H22) and zinc (Zintek) alloys, as well as dissimilar welds between galvanised steel and zinc, were studied. The defective aluminium welds were found to be characterised by important grain growth inside an inhomogeneous nugget and by the presence of important voids and cracks. The zinc welds showed a well defined nugget, but with porosities and some cracks. In the dissimilar steel\u2013zinc welds, important macroscopic defects were observed. Microstructural analysis evidenced the occurrence of melting at the zinc side of the welds; meanwhile, no microstructural modifications could be observed for the steel side. Defect formation, as well as weld morphologies, was related to the variation in welding parameters. <\/jats:p>","DOI":"10.1179\/1362171815y.0000000031","type":"journal-article","created":{"date-parts":[[2015,4,21]],"date-time":"2015-04-21T09:41:49Z","timestamp":1429609309000},"page":"409-417","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":13,"title":["Analysis of weld defects in similar and dissimilar resistance seam welding of aluminium, zinc and galvanised steel"],"prefix":"10.1177","volume":"20","author":[{"given":"T.","family":"Mira-Aguiar","sequence":"first","affiliation":[{"name":"CEMUC, Department of Mechanical Engineering, University of Coimbra, Rua Lui\u00eds Reis Santos, Coimbra 3030-788, Portugal"}]},{"given":"I.","family":"Galv\u00e3o","sequence":"additional","affiliation":[{"name":"CEMUC, Department of Mechanical Engineering, University of Coimbra, Rua Lui\u00eds Reis Santos, Coimbra 3030-788, Portugal"}]},{"given":"C.","family":"Leit\u00e3o","sequence":"additional","affiliation":[{"name":"CEMUC, Department of Mechanical Engineering, University of Coimbra, Rua Lui\u00eds Reis Santos, Coimbra 3030-788, Portugal"}]},{"given":"D. M.","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"CEMUC, Department of Mechanical Engineering, University of Coimbra, Rua Lui\u00eds Reis Santos, Coimbra 3030-788, Portugal"}]}],"member":"179","published-online":{"date-parts":[[2015,5,1]]},"reference":[{"key":"bibr1-1362171815Y.0000000031","unstructured":"Groover M. \u2018Fundamentals of modern manufacturing \u2013 materials, processes and systems\u2019, 4th edn; 2010, New York, John Wiley & Sons, Inc."},{"key":"bibr2-1362171815Y.0000000031","doi-asserted-by":"crossref","unstructured":"Weman K. \u2018Welding processes handbook\u2019; 2003, Cambridge, Woodhead Publishing Ltd.","DOI":"10.1533\/9781855738539"},{"key":"bibr3-1362171815Y.0000000031","doi-asserted-by":"publisher","DOI":"10.1016\/j.matdes.2012.06.043"},{"key":"bibr4-1362171815Y.0000000031","doi-asserted-by":"publisher","DOI":"10.1016\/j.matchar.2014.03.016"},{"key":"bibr5-1362171815Y.0000000031","doi-asserted-by":"publisher","DOI":"10.1179\/1362171813Y.0000000183"},{"key":"bibr6-1362171815Y.0000000031","doi-asserted-by":"publisher","DOI":"10.1016\/j.matdes.2012.08.053"},{"key":"bibr7-1362171815Y.0000000031","unstructured":"Zhang H.,  and Senkara J. \u2018Resistance welding \u2013 fundamentals and applications\u2019; 2006, Boca Raton, FL, Taylor & Francis Group."},{"key":"bibr8-1362171815Y.0000000031","first-page":"249s","volume":"90","author":"Luo H.","year":"2011","journal-title":"Weld. 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