Fatigue life enhancement by residual stress engineering in refill friction stir spot welds: Experimental investigation and industrial application

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Bibliographic data

Copyright year: 2025
ISBN-Online: 978-3-69030-152-7
Publisher: TEWISS, Garbsen
Series: Schriftenreihe des Instituts für Produktionstechnik und -systeme
Volume: 06/2025
Language: German
Pages: 109
Product type: Book Titles

ChapterPages

Titelei/Inhaltsverzeichnis No access Pages i - xviii
1. 1.1 Motivation and research gap No access
2. 1.2 Objectives and approach No access
3. 1.3 Industrial application of refill FSSW as part of the technology transfer lightweight design project LESSMAT No access
4. 1.4 Thesis structure No access
1. 2.1 Aluminium and aluminium alloys No access
2. 2.2 Residual stresses No access
3. 2.3 Refill friction stir spot welding No access
4. 2.4 Linear elastic fracture mechanics No access
5. 2.5 Fatigue crack growth No access
1. 3.1 Welding technology and equipment No access
2. 3.2 Welding parameter and materials No access
3. 3.3 Optical and scanning electron microscopy No access
4. 3.4 Hardness measurements No access
5. 3.5 Tensile testing No access
6. 3.6 Fatigue testing No access
7. 3.7 Crack propagation No access
8. 3.8 Temperature measurements No access
9. 3.9 Digital image correlation No access
10. 3.10 Determination of Residual stress No access
1. 4.1 Crack propagation behavior in the microstructurally effected zone of refill FSSW executed as blind welds in single sheet metal configuration No access
2. 4.2 Microstructural investigations No access
3. 4.5 Conclusions No access
1. 5.1 Investigation of the correlation between energy input, residual stresses and mechanical properties in spot welds performed by refill FSSW No access
2. 5.2 Discussion No access
3. 5.3 Conclusions No access
1. 6.1 Microstructure and hardness analyses No access
2. 6.2 Fatigue life properties and fracture mode No access
3. 6.3 Residual stresses No access
4. 6.4 Discussion No access
5. 6.5 Conclusions No access
1. 7.1 Manufacturing concept No access
2. 7.2 Mechanical qualification No access
3. 7.3 Production and mechanical validation of the demonstrator No access
Chapter 8: Summary and conclusions No access Pages 83 - 84
References No access Pages 85 - 98
1. A Fatigue results - reference specimens No access
2. B Fatigue results - modified specimens No access
3. C Geometrie of 3D-printed web structure No access
4. D Welding parameter and results BBD No access
5. E Fatigue results - defectiv specimens No access