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Joining of hybrid joints between thermoplastics and alumnium alloy by friction stir lap welding: a feasability study
KTH, School of Industrial Engineering and Management (ITM), Production Engineering.
KTH, School of Industrial Engineering and Management (ITM), Production Engineering, Welding Technology.ORCID iD: 0000-0002-6061-662X
2014 (English)In: 10th Friction Stir Welding Symposioum, 2014, S6B-P4- p.Conference paper (Refereed)
Place, publisher, year, edition, pages
2014. S6B-P4- p.
National Category
Other Engineering and Technologies
Research subject
SRA - Production
URN: urn:nbn:se:kth:diva-161921OAI: diva2:796570
10th Friction Stir Welding Symposium, Beijing china 20‐22 May 2014

QC 20150323

Available from: 2015-03-19 Created: 2015-03-19 Last updated: 2015-09-08Bibliographically approved
In thesis
1. Development and evaluation of hybrid joining for metals to polymers using friction stir welding
Open this publication in new window or tab >>Development and evaluation of hybrid joining for metals to polymers using friction stir welding
2015 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Combinations of different materials are increasingly used in the modern engineering structures. The driving forces of this trend are rising fuel costs, global warming, customer demands and strict emission standards. Engineers and industries are forced to improve fuel economy and cut emissions by introducing newly design engines and lightweighting of structural components. The use of lightweight materials in the structures has proved successful to solve these problems in many industries especially automobile and aerospace. However, industry still lacks knowledge how to manufacture components from polymeric materials in combination with metals where significant differences exist in properties.

This thesis aims to demonstrate and generate the methodology and guidelines for hybrid joining of aluminium alloys to thermoplastics using friction stir welding. The developed technique was identified, optimized and evaluated from experimental data, metallography and mechanical characterization. The success of the technique is assessed by benchmarking with recent literatures.

In this work, lap joints between aluminium alloys (AA5754, AA6111) and thermoplastics (PP, PPS) were produced by the friction stir welding technique. The specimens were joined with the friction stir welding tools under as-received conditions. Metallic chips were generated and merged with the molten thermoplastic to form a joint under the influence of the rotating and translating tool. The effects of process parameters such as rotational speed, translational speed and distance to backing were analyzed and discussed. The investigation found joint strength was dominated by mechanical interlocking between the stir zone and the aluminium sheet. The results also show that the joint strength is of the same order of magnitude as for other alternative joining techniques in the literature.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015
TRITA-IIP, ISSN 1650-1888 ; 15:05
aluminium alloy, thermoplastic, friction stir welding, dissimilar joining
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Engineering
urn:nbn:se:kth:diva-173232 (URN)978-91-7595-680-0 (ISBN)
2015-09-25, M311, Brinellvägen 68, KTH, Stockholm, 10:00 (English)
VINNOVA, Dnr 2010-01982

QC 20150908

Available from: 2015-09-08 Created: 2015-09-08 Last updated: 2015-09-08Bibliographically approved

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