| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Coatings and Surface Engineering for Environmental Protection II
|
| Presentation Title |
Corrosion Behavior of Ultrasonic-welded AZ31B and Dual-phase Steel with and without Galvanized Layer |
| Author(s) |
Jiheon Jun, Chen Jian, Yong Chae Lim, Michael Brady, Donovan Leonard, Zhili Feng |
| On-Site Speaker (Planned) |
Jiheon Jun |
| Abstract Scope |
Application of magnesium (Mg) alloys for autobody structures can reduce the total weight of vehicles, leading to improved fuel efficiency. However, Mg alloys are highly susceptible to corrosion, and the corrosion of Mg alloys can be exacerbated when they are joined with other metals due to the galvanic effect. In this work, a commercial Mg alloy, AZ31B, was ultrasonically welded with dual-phase steels with and without a galvanized Zn layer. The joint area was selectively exposed to the corrosive medium with insulating tape masking in order to focus on the corrosion behavior at the joint of AZ31B and steel. The masked specimens were immersed in 0.1 M NaCl for 24 h and longer, and the corrosion depth of the joint area was measured. Mechanical joint strength of post-corrosion specimens was also assessed using lap shear tensile tests, and the microstructural and chemical analysis on corroded joint area were also conducted. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |