| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Advanced Joining Technologies for Automotive Lightweight Structures
|
| Presentation Title |
Fatigue Analyses of Dissimilar Aluminum-Steel Clinch Joints for Lightweight Construction |
| Author(s) |
Lars Ewenz, Sebastian Schöne, Martina Zimmermann |
| On-Site Speaker (Planned) |
Lars Ewenz |
| Abstract Scope |
In this research, the fatigue behavior of a dissimilar aluminum-steel clinch joint is opposed to aluminum-aluminum and steel-steel clinch joints. The cyclic strength is essential in lightweight design approaches, where the design shall push strength limits. The material combination used here, EN AW-6014 and HCT590, offers excellent practical relevance since both materials are widely used in the automotive industry. A first analysis shows that the aluminum-aluminum clinch joint is about 70% weaker than the steel-steel variant, which is not surprising. However, contrary to the expectation that the dissimilar aluminum-steel clinch joint would be in the range of the fatigue properties of the aluminum-aluminum clinch joint, the dissimilar joint achieves even less than 60% of the fatigue strength. SEM and optical microscopy investigations elucidate whether this behavior is caused by the different clinch geometries and the resulting load distribution during shear loading. |