Effect of hook characteristics on the fracture behaviour of dissimilar friction stir welded aluminium alloy and mild steel sheets

Wang, Tianhao; Sidhar, Harpreet; Mishra, Rajiv S.; Hovanski, Yuri; Upadhyay, Piyush; Carlson, Blair

doi:10.1080/13621718.2018.1503801

Effect of hook characteristics on the fracture behaviour of dissimilar friction stir welded aluminium alloy and mild steel sheets

Journal Article · Mon Jul 02 04:00:00 EDT 2018 · Science and Technology of Welding and Joining

DOI:https://doi.org/10.1080/13621718.2018.1503801· OSTI ID:1492688

^[1]; ^[1]; ^[1]; ^[2]; Upadhyay, Piyush ^[3]; Carlson, Blair ^[4]

Center for Friction Stir Processing, Department of Materials Science and Engineering, University of North Texas, Denton, TX, USA
Manufacturing Engineering Technology, Brigham Young University, Provo, UT, USA
Pacific Northwest National Laboratory, Energy Materials and Manufacturing, Richland, WA, USA
General Motors Technical Center, Warren, MI, USA

Under tensile shear loading, fracture modes of dissimilar lap welds produced by friction stir scribe technology were studied. Three fracture modes were observed. For zone A fracture, the initial crack was restrained, and the joint ultimately fractured in the base mild steel. For zone B fracture, the initial crack progressed through the aluminium sheet just above the Al/steel interface. For zone C fracture, the initial crack proceeded along the steel hook to the aluminium sheet surface. Fracture mode and joint strength were greatly influenced by steel hook size, and the steel hook size was affected by welding parameters and tool scribe height. In this study, the experimental joint strength achieved the calculated joint load limit.

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-76RL01830

OSTI ID:: 1492688

Report Number(s):: PNNL-SA-138316

Journal Information:: Science and Technology of Welding and Joining, Journal Name: Science and Technology of Welding and Joining Journal Issue: 2 Vol. 24; ISSN 1362-1718

Publisher:: Taylor & Francis

Country of Publication:: United States

Language:: English

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