Corrosion behaviour of friction-bit-joined and weld-bonded AA7075-T6/galvannealed DP980
- Materials Science & Technology Division, Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, TN, USA
- Manufacturing Engineering Technology, Brigham Young University, Provo, UT, USA
- Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN, USA
Joining of aluminium alloys 7075-T6 and galvannealed dual phase 980 steel was achieved by friction bit joining (FBJ) and weld-bonding (FBJ + adhesive) processes. Accelerated laboratory-scale corrosion tests were performed on both FBJ only and weld-bonded specimens to study joint strength under a corrosive environment. Static lap shear tests showed that both FBJ only and weld-bonded cases generally retained more than 80% of the joint strength of non-corroded specimens at the end of corrosion testing. The presence of Zn/Fe coating on the steel substrate resulted in improved corrosion resistance for FBJ specimens, compared to joints produced with bare steel. Finally, an optical microscopy was used for cross-sectional analysis of corroded specimens. Some corrosion on the joining bit was observed near the bit head. However, the joining bit was still intact on the steel substrate, indicating that the primary bond was sound.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 2281412
- Alternate ID(s):
- OSTI ID: 1360014
- Journal Information:
- Science and Technology of Welding and Joining, Journal Name: Science and Technology of Welding and Joining Vol. 22 Journal Issue: 6; ISSN 1362-1718
- Publisher:
- SAGE PublicationsCopyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
Web of Science
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