This research investigates welding and brazing of Al-Gr composite using different joining techniques. Limited success is obtained for laser welding since laser degrades the mechanical properties at the weld due to defects in the resolidified aluminum matrix, delamination of graphite fibers, and formation of brittle aluminum carbide Al 4C 3. Brazing is the preferred technique since the low brazing temperature of filler material suppresses the formation of Al 4C 3 while minimizing shrinkage cavities in the joint. Microstructural study and shear testing confirms the success of joining Al-Gr by laser brazing and resistance brazing with Zn-Al filler.
Bibliographical noteFunding Information:
This material is based upon work supported by the National Science Foundation under grant #0552885 and TAMU-CONACyT grant #246734. Contribution from Metal Matrix Cast Composites is much appreciated.
Copyright 2012 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Computer Science Applications
- Metals and Alloys
- Industrial and Manufacturing Engineering