| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Substrate Protection for Corrosion Prevention
|
| Presentation Title |
Characterizations of Corrosion Tested CFRC-AZ31B Joint by Friction Self-pierce Riveting Process |
| Author(s) |
Yong Chae Lim, Jiheon Jun, Jian Chen, Michael Brady, Donovan Leonard, Zhili Feng |
| On-Site Speaker (Planned) |
Yong Chae Lim |
| Abstract Scope |
For improved fuel efficiency, advanced high specific strength materials such as magnesium alloys and carbon fiber reinforced composite (CFRC) can be employed for lightweight transportation. However, joining and corrosion (particularly galvanic corrosion) of these dissimilar materials are critical technical obstacles for this application. In the present work, we adapted a unique friction self-piercing rivet process to spot join a CFRC to magnesium alloy AZ31B at a laboratory coupon scale. Corrosion behavior of this dissimilar joint was evaluated by 0.1 M NaCl immersion testing with different exposure times. Different surface coatings/modifications were applied to the rivet material in an attempt to minimize galvanic effects at the rivet/multi-material interface. Post exposure joints were evaluated by lap shear tensile testing, corrosion depth assessment, and optical and electron microscopy. Surface coatings/modification of the rivet material showed potential to reduce galvanic corrosion of the AZ31B compared to the untreated rivet in preliminary testing |