This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of 6xxx Alloy Aluminum Sheet for Autobody Outer Panels: Bake Hardening, Formability and Trimming Performance
Technical Paper
1999-01-3195
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In response to requirements of car manufacturers for high volume light weight solutions, Pechiney has developed a range of 6016 variants for outer autobody panels:
- HF100 and HF120, with optimized formability for complex stampings
- DR100 and DR120, with optimized processing for increased bake-hardening response.
Processing of these variants was optimized to minimize surface roughening during forming, necessary for high quality paint finish. Laboratory formability tests (Forming Limits Diagrams, Limiting Dome Height test) showed improved properties for the new 6016 products compared with previous 6016A-T4, particularly in the case of the HF variants. These results were confirmed by full scale stamping validations on a complex part. Excellent hem flanging performance was also demonstrated.
Sliver formation during trimming of stampings was studied in detail. Fine slivers generated by the trimming can accumulate in the stamping tools, resulting in surface defects requiring costly manual rework. Guidelines for trimming tool parameters were established. In addition to the tool variables, metallurgical parameters influence trimming behavior to some extent. The HF and DR variants of Pechiney 6016 improve the robustness of trimming process and consequently the productivity of the stamping lines of high volume aluminum outer autobody panels.
Recommended Content
Authors
Topic
Citation
Daniel, D., Shahani, R., Baldo, R., and Hoffmann, J., "Development of 6xxx Alloy Aluminum Sheet for Autobody Outer Panels: Bake Hardening, Formability and Trimming Performance," SAE Technical Paper 1999-01-3195, 1999, https://doi.org/10.4271/1999-01-3195.Also In
References
- Li M. Fata G. SAE Paper 1999-01-0661
- Murtha S. J. SAE Paper 950718
- Bloeck M. Timm J. Aluminium 70 1994 87
- Fortin P. E. Bull M. J. Moore D. M. SAE Paper 830096
- Sigli C. et al. Proc. ICAA 6 Sato T. et al Tokyo Jpn. Inst. Light Metals 1998 87
- Bryant J. D. Proc. Automotive Alloys Das S. K. Kipouros G. J. TMS 1997 19
- Gupta A. K. Lloyd D. J. Bull M. J. SAE Paper 960164
- Saga M. et al. Mater. Sci. Forum 217-222 1996 821
- Uchida H. Yoshida H. J. Jpn. Inst. Light Metals 1996 427
- Bryant J. D. Kung H. Misra A. Proc. Automotive Alloys II Das S. K. TMS 1998 3
- Gupta A. K. et al. Proc. ICAA 4 Sanders T. H. Jr. Starke E. A. Jr. Atlanta Georgia Institute of Technology 1994 177
- Miller W. S. et al. Proc. ICAA 4 Sanders T. H. Jr. Starke E. A. Jr. Atlanta Georgia Institute of Technology 1994 410
- Rodrigues P. M. Sheet Metal Ind. 61 1984 492
- Bottema J. et al. SAE Paper 9810007
- Murtha S. J. et al. Proc. Automotive stamping technology, SAE SP-1067 1995 103
- Ramage R. M. Bryant J. D. Beaudoin A. J. Proc. Automotive Alloys II Das S. K. TMS 1998 19