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dc.contributor.authorChen, ZW
dc.contributor.authorYazdanian, S
dc.contributor.authorLittlefair, G
dc.identifier.citation9th international symposium on friction stir welding , Huntsville, USA, 2012-05-15to 2012-05-17, published in: Proceedings of the 9th international symposium on friction stir welding, pp.? - ? (6)
dc.description.abstractFriction stir lap diffusion welding (FSLDW) of Al-to-steel experiments were conducted followed by mechanical testing and metallurgical examination of the welds to study the formation of microstructure at the interface region and its effect on fracture strength. It has been found that fracture strength was very sensitive to the distance (Ldis) between the bottom of the pin to the bottom steel plate. When Ldis was sufficiently small at 0.3 mm, interfacial diffusion and subsequent intermetallic formation was insured but the resulting intermetallic outbursts present along the interface represent the case of incomplete metallurgical joint established. As a result, joint strength is low. A slight pin penetration when Ldis  -0.1 mm has been confirmed to provide a significant increase in joint strength where the interface region was a laminate of deformed steel and intermetallics. It has been found that at Ldis  0 mm, a joint was established with a continuous interfacial intermetallic layer and the weld test sample fractured in a ductile manner during in tensile-shear test, resulting in a considerable increase in fracture strength.
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in (see Citation). The original publication is available at (see Publisher's Version).
dc.titleThe role of joint interface on tensile-shear fracture strength of friction stir lap diffusion al-to-steel welds
dc.typeConference Contribution
aut.conference.typePaper Published in Proceedings

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