Thermal science of weld bead defects / P. S. Wei in Journal of heat transfer, Vol. 133 N° 3 (Mars 2011)  

Public ISBD [article]  inJournal of heat transfer > Vol. 133 N° 3 (Mars 2011) . - pp. [031005/1-22] Titre : Thermal science of weld bead defects : a review Type de document : texte imprimé Auteurs : P. S. Wei, Auteur Année de publication : 2011 Article en page(s) : pp. [031005/1-22] Note générale : Physique Langues : Anglais (eng) Mots-clés : Weld defects Bead Surface patterns Pattern selection Humping Rippling Index. décimale : 536 Chaleur. Thermodynamique Résumé : Mechanisms for the formation of bead defects, such as humping, gouging, rippling, and other unexpected surface patterns, encountered in welding or drilling are interpreted and reviewed from thermal-fluid science viewpoint. These defects usually accompanying with porosity, undercut, segregation, stress concentration, etc., seriously reduce the properties and strength of the joint or solidification. Even though different mechanisms for formation of the defects have been extensively proposed in the past, more systematical understanding of pattern formations from thermal, fluid, physics, electromagnetic, pattern selections, and metallurgy sciences is still limited. The effects of working parameters and properties on humping and rippling, for example, can be systematically and quantitatively interpreted from scale analysis presented in this work. Good comparison with experimental results reveals mechanisms of different surface patterns. The mechanistic findings for bead defects are also useful for other manufacturing and materials processing. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...] [article] Thermal science of weld bead defects : a review [texte imprimé] / P. S. Wei, Auteur . - 2011 . - pp. [031005/1-22]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 3 (Mars 2011) . - pp. [031005/1-22] Mots-clés : Weld defects Bead Surface patterns Pattern selection Humping Rippling Index. décimale : 536 Chaleur. Thermodynamique Résumé : Mechanisms for the formation of bead defects, such as humping, gouging, rippling, and other unexpected surface patterns, encountered in welding or drilling are interpreted and reviewed from thermal-fluid science viewpoint. These defects usually accompanying with porosity, undercut, segregation, stress concentration, etc., seriously reduce the properties and strength of the joint or solidification. Even though different mechanisms for formation of the defects have been extensively proposed in the past, more systematical understanding of pattern formations from thermal, fluid, physics, electromagnetic, pattern selections, and metallurgy sciences is still limited. The effects of working parameters and properties on humping and rippling, for example, can be systematically and quantitatively interpreted from scale analysis presented in this work. Good comparison with experimental results reveals mechanisms of different surface patterns. The mechanistic findings for bead defects are also useful for other manufacturing and materials processing. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...]

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