Journal
MATERIALS & DESIGN
Volume 83, Issue -, Pages 36-41Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2015.05.082
Keywords
Friction spot welding; Aluminum alloy; Titanium alloy; Dissimilar joint; Design of experiments; Response of surface methodology
Categories
Funding
- Helmholtz Association - Germany
- CAPES (Coordination for the Improvement of Higher Education Personnel - Brazil)
- CNPq (National Council for Scientific and Technological Development Brazil)
- FAPESP (Sao Paulo Research Foundation - Brazil)
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Friction spot welding is a relatively new solid-state joining process able to produce overlap joints between similar and dissimilar materials. In this study, the effect of the process parameters on the lap shear strength of AA6181-T4/Ti6Al4V single joints was investigated using full-factorial design of experiment and analyses of variance. Sound joints with lap shear strength from 4769 N to 6449 N were achieved and the influence of the main process parameters on joint performance was evaluated. Tool rotational speed was the parameter with the largest influence on the joint shear resistance, followed by its interaction with dwell time. Based on the experimental results following response surface methodology, a mathematical model to predict lap shear strength was developed using a second order polynomial function. The initial prediction results indicated that the established model could adequately estimate joint strength within the range of welding parameters being used. The model was then used to optimize welding parameters in order satisfy engineering demands. (C) 2015 Elsevier Ltd. All rights reserved.
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