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Aspects of Weld Metallurgical Characteristics and Fracture Mechanism in Formability Tests of Non-Vacuum Electron Beam Tailor-Welded AA5754-O temper Aluminum Blanks
Technical Paper
2000-01-2663
ISSN: 0148-7191, e-ISSN: 2688-3627
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Language:
English
Abstract
This study determines the correlation between microstructure, fracture mechanism and formability of Al tailor-welded blanks (TWBs). It is found that porosity in the welds is detrimental to the formability of non-vacuum electron beam (NVEB) welded AA5754-O temper Al TWBs. It is also found that the degree of influence of the weld characteristics on formability can be minimal in one test condition, but critical in another, depending on the loading condition, strain state (related to blank geometry) and relative position of the weld seam to the major strain during forming.
Metallography, microhardness measurement, electron probe chemical analysis and fractography for 1-2 mm NVEB AA5754-O temper of Al TWBs were used to analyze precipitation, porosity, grain structure, microhardness profile and microchemistry profile across the weld of Al TWBs and their fracture mechanisms during forming tests. Formability of the NVEB welded AA5754 Al TWBs has been previously evaluated. In this study, observations of the failure location are carried out on those specimens subjected to transverse tensile, longitudinal tensile, transverse dome and longitudinal dome tests.
Authors
- Hermina Wang - Materials Technology Laboratory, CANMET, Natural Resources Canada
- Pierre Martin - Materials Technology Laboratory, CANMET, Natural Resources Canada
- Jo Ann Clarke - Alcan Global Automotive Products
- Bernie Altshuller - Alcan International Limited
- Mark J. Finn - Alcan International Limited
- Frank Feng - Alcan International Limited
Citation
Wang, H., Martin, P., Clarke, J., Altshuller, B. et al., "Aspects of Weld Metallurgical Characteristics and Fracture Mechanism in Formability Tests of Non-Vacuum Electron Beam Tailor-Welded AA5754-O temper Aluminum Blanks," SAE Technical Paper 2000-01-2663, 2000, https://doi.org/10.4271/2000-01-2663.Also In
References
- Kubel E. “Manufacturers want more tailored blanks” Manufacturing Engineering 119 5 Nov. 1997 38 42 44 45
- Irving B. “Welding tailored blanks is hot issue for automakers” Welding Journal Aug. 1995 49 52
- Waddell W. Jackson S. Wallach E.R. “The influence of the weld structure on the formability of laser welded tailored blanks” SAE Transactions: Journal of Materials & Manufacturing 107 1998 1358 1369
- Lee A.P. Feltham E. Van Deventer J. “Tailor welded blank technology for automotive applications” Sheet Metal Stamping for Automotive Applications , 1996 SAE International Congress & Exposition Detroit, MI Feb. 26-29 1996 91 102
- Shi M.F. Pickett K.M. Bhatt K.K. “Formability Issues in the application of tailor welded blank sheets” Sheet Metal Stamping for Automotive Applications , 1993 SAE International Congress & Exposition Detroit, MI March 1 1993 27 35
- Pickett K.M. Shi M.F. Bhatt K.K. Selvaraj J. “Structure property relationships of resistance mash seam welded tailored blanks with post heat treatment” Proceedings of Metallographic Characterization of Metals After Welding, Processing, and Service Denver, Colorado Aug. 4-5 1992 87 102
- Scriven P.J. Brandon J.A. Williams N.T. “Relative influence of sheet rolling direction and weld orientation on formability of laser welded steel sheet” Ironmaking and Steelmaking 24 1 1997 79 83
- Baysore J.K. Williamson M.S. Adonyi Y. Millian J.L. “Laser beam welding and formability of tailored blanks” Welding Journal 10 1985 345s 352s
- Stasik M.C. Wagoner R.H. “Forming of tailor-welded aluminum blanks” Proceedings of Symposium of Aluminum and Magnesium for Automotive Applications TMS 1996 69 83
- Davies R.W. Oliver H.E. Smith M.T. Grant G.J. “Characterizing Al tailor-welded blanks for automotive applications” JOM 51 11 1999 46 50
- Martin P. Zhang R. Altshuller B. Finn M.J. Worswick M.J. “Formability of aluminum multi-gauge tailor welded blanks” Proceedings International Symposium on Light Metals CIM 1998 409 423
- Buste A. Lalbin X. Worswick M.J. Clarke J.A. et al. “Prediction of strain distribution in aluminum tailor welded blanks for different welding techniques” Proceedings of the International Symposium on Light Metals , 38 th Annual Conference of Metallurgists of CIM 1999 485 500
- Smith D.J. Martukanitz R.P. Howell P.R. “Laser beam welding of aluminum alloy 5754 for automotive applications” Proceedings of the International Symposium on Light Metals CIM 1993 581 588
- Moon D.W. Metzbower E.A. “Laser beam welding of aluminum alloy 5456” Welding Journal 62 2 1983 53s 58s
- Cieslak M.J. Fuerschbach P.W. “On the weldability, composition, and hardness of pulsed and continuous Nd:YAG laser welds in aluminum alloys 6061, 5456, and 5086” Metallurgical Transactions B 19B 1988 319 329
- Dickerson P.B. “Welding of aluminum alloys” ASM Handbook ASM International 6 1993 722
- Mukae S. Katoh M. “Solidification structure in weld metals of weldable structure aluminum alloy (5083P)” J. Light Met. Weld & Constr. (in Japanese) 16 2 1978 50 59
- Fukui T. Namba K. “Basic studies on welds and its effect on solidification metals. Part 5, Formation of dendritic structure in aluminum alloy wleds and its effect on some properties” J. Jap. Inst. Light Met. 22 11 1972 651 660
- Ganaha T. Pearce B.P. Kerr H.W. “Grain structures in aluminum alloy GTA welds” Metallurgical Transactions A 11A 1980 1351 1359