ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Recently a new welding technique, the so-called ‘Cold Metal Transfer’ (CMT) techniquewas introduced, which due to integrated wire feeding leads to lower heat input and higherproductivity compared to other gas metal arc (GMA) techniques. Here microstructure formation andresidual stress state in dissimilar steel to aluminum CMT welds are investigated. The intermetallicphase seam between the filler and the steel is only a few micrometers thick. Residual stress analysesreveal the formation of the typical residual stress state of a weld without phase transformation. Bothin longitudinal and in transversal direction compressive residual stresses exist in the steel plateparent material, tensile residual stresses are present in the heat affected zone of the steel and thealuminum alloy. The area containing tensile residual stresses is larger in the aluminum alloy due toits higher heat conductivity than in the steel. Due to the symmetry in the patented voestalpinewelding geometry and the welding from bottom and face side of the weld, the residual stressdistributions at the top and at the bottom side of the weld are very similar
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.571-572.347.pdf
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