| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Advanced Joining Technologies for Automotive Lightweight Structures
|
| Presentation Title |
A Novel Approach to Determine Intermetallic Formation and Growth in the Aluminum-Iron System Using Resistance-based Diffusion Couples |
| Author(s) |
Michael Eff, Wei Zhang, Jerry Gould, Antonio Ramirez |
| On-Site Speaker (Planned) |
Michael Eff |
| Abstract Scope |
Lightweighting is a key trend across the automotive industry and has led to an ever-growing variety of materials used in a vehicle. To optimize the multi-material benefits, dissimilar materials must be joined. The most common combination is aluminum to steel, which often forms brittle intermetallic compounds (IMC) when joined. IMC kinetics and nucleation data at time scales of typical welding processes do not exist in open literature. This work focuses on the results of a novel rapid resistance-based diffusion couple in the Al-Fe system to generate this much needed kinetics data. The samples were rapidly heated to 375°C and 500°C for times varying from 0.25-s up to 10-s and then quenched. The IMC layers were characterized using both SEM and TEM techniques for composition, morphology and crystal structure. Both short time kinetics plots and a new insight into Fe-Al IMC nucleation mechanism were generated as a result of this work. |