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Single Point Incremental Forming of an Aged AL-Cu-Mg Alloy: Influence of Pre-heat Treatment and Warm Forming

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Abstract

This research is aimed at enhancing the poor room temperature formability of heat-treatable aluminum alloy AA2024-T3, without deterioration of its post-forming properties. For this purpose, the influences of different heat-treatment conditions as well as warm forming on the single point incremental forming formability and post-forming properties of this material were investigated. Thermal pre-treatments were consisting of annealing (O-temper), solution treating and quenching (W-temper), and solution heat treating, quenching, and then cold working (T-temper). The formability results as well as forming forces of pre-heat-treated sheets were compared to those of the warm forming process results carried out using a laser-assisted single point incremental forming (LASPIF) setup. The post-forming properties of SPIF-formed parts were analyzed by hardness testing. The maximum forming angles of the blank formed under O-temper and W-temper conditions showed, respectively, 41 and 32% increases compared to the one under T-temper condition. LASPIF forming of this material at a temperature of about 360 °C resulted in 41% improvement in the maximum forming angle with respect to parts formed at room temperature from the T-temper sheet. The hardness of the material reduced significantly after annealing, while SPIF parts formed from W-temper blanks and under LASPIF condition regained their hardness after natural aging. The fracture surface characteristics of the failed parts showed that voids nucleate at the interface between intermetallic particles and matrix, and a dimple rupture fracture mode was identified under all heat-treatment conditions. Under O-temper condition, due to precipitation of particles along the grain boundary, an intergranular dimple rupture was observed. Finally, Energy dispersive x-ray (EDX) and electron backscattered diffraction (EBSD) were used to investigate the possible effects of the heat treatment and the deformation on the changes in the composition of intermetallic and second-phase particles, grain size, and texture.

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References

  1. P.J. Bolt, N.A.P.M. Lamboo, P.J.C.M. Rozier, Feasibility of Warm Drawing of Aluminium Products, J. Mater. Process. Technol. 2001, 115(1), p 118–121.

  2. L. Wang, M. Strangwood, D. Balint, J. Lin, and T.A. Dean, Formability and Failure Mechanisms of AA2024 Under Hot Forming Conditions, Mater. Sci. Eng. A Struct., 2011, 528(6), p 2648–2656

    Article  Google Scholar 

  3. H. Wang, Y.B. Luo, P. Friedman, M.H. Chen, and L. Gao, Warm Forming Behavior of High Strength Aluminum Alloy AA7075, Trans. Nonferr. Metal. Soc. China, 2012, 22(1), p 1–7

    Article  Google Scholar 

  4. P. Kulkarni and S. Prabhakar, Influence of the Effect of Strain Rates on Springback in Aluminum 2024 (ISO AlCuMg1), The 4th European LS-DYNA, May 22-23, 2013 (Ulm(Germany)), p 27–34.

  5. M. O’Donnell, A.G. Leacock, D. Banabic, D. Brown, and R.J. McMurray, The Effect of Pre-Strain and Solution Heat Treatment on the Formability of a 2024 Aluminium Alloy, Int J Mater Form., 2008, 1(1), p 257–260

    Article  Google Scholar 

  6. D. He, X. Li, D. Li, and W. Yang, Process Design for Multi-stage Stretch Forming of Aluminium Alloy Aircraft Skin, Trans. Nonferr. Met. Soc. China, 2010, 20(6), p 1053–1058

    Article  Google Scholar 

  7. J. Jeswiet, F. Micari, G. Hirt, A. Bramley, J. Duflou, and J. Allwood, Asymmetric Single Point Incremental Forming of Sheet Metal, CIRP Ann. Manuf. Technol., 2005, 54(2), p 88–114

    Article  Google Scholar 

  8. J.R. Duflou, B. Callebaut, J. Verbert, and H. De Baerdemaeker, Laser Assisted Incremental Forming: Formability and Accuracy Improvement, CIRP Ann. Manuf. Technol., 2007, 56(1), p 273–276

    Article  Google Scholar 

  9. ASM International, Heat Treating of Aluminum Alloys. ASM Handbook Heat treating, Vol. 4, ASM International, Materials Park, 1991, p 1861–1960

  10. R.C. Dorward, Forming Characteristics of Coarse and Fine-Grained AA 2024 Aluminum Alloy Sheet, J. Mater. Eng. Perform., 1994, 3(1), p 115–121

    Article  Google Scholar 

  11. G. Ambrogio, L. Filice, and G.L. Manco, Warm Incremental Forming of Magnesium Alloy AZ31, CIRP Ann. Manuf. Technol., 2008, 57(1), p 257–260

    Article  Google Scholar 

  12. L. Galdos, E.S.D. Argandoña, I. Ulacia, and G. Arruebarrena, Warm Incremental Forming of Magnesium Alloys Using Hot Fluid as Heating Media, Key Eng. Mater., 2012, 504–506, p 815–820.

  13. G. Palumbo and M. Brandizzi, Experimental Investigations on the Single Point Incremental Forming of a Titanium Alloy Component Combining Static Heating with High Tool Rotation Speed, Mater. Design, 2012, 40(6), p 43–51

    Article  Google Scholar 

  14. A. Mohammadi, H. Vanhove, A. Van Bael, and J.R. Duflou, Formability Enhancement in Incremental Forming for an Automotive Aluminium Alloy Using Laser Assisted Incremental Forming, Key Eng. Mater., 2015, 639, p 195–202

    Article  Google Scholar 

  15. ASTM International, Standard Practice for Measuring and Compensating for Emissivity Using Infrared Imaging Radiometers, ASTM E1933-14, ASTM International, West Conshohocken, PA, 2014.

  16. F. Vollertsen, Laserstrahlumformen, Lasergestützte Formgebung, Verfahren, Mechanismen, Modellierung, Meisenbach, Bamberg, 1996. (in German)

  17. J.R. Davis, JRD Associates, ASMIH Committee, Aluminum and Aluminum Alloys, ASM International, Materials Park, 1993.

  18. M. Kapustová and M. Martinkovic, Influence of Temperature on Plasticity and Workability of Aluminum Alloys, Annals of the Faculty of Engineering Hunedoara, Int. J. Eng., 2012, 10(2), p 223–226

    Google Scholar 

  19. W. Ostwald, Lehrbuch der Allgemeinen Chemie (1896), Vol. 2, Part 1, Leipzig, Germany, 1896

  20. E. Orowan and Faraday S, Symposium on Internal Stresses in Metals and Alloys, Inst. Met., 1948, p 451.

  21. T. Gladman, Precipitation Hardening in Metals, Mater. Sci. Tech., 1999, 15(1), p 30–36

    Article  Google Scholar 

  22. C.F. Guzmán, J. Gu, J.R. Duflou, H. Vanhove, P. Flores, and A.M. Habraken, Study of the Geometrical Inaccuracy on a SPIF Two-Slope Pyramid by Finite Element Simulations, Int. J. Solids Struct., 2012, 49(25), p 3594–3604

    Article  Google Scholar 

  23. A. Mohammadi, H. Vanhove, A. Van Bael, M. Seefeldt, and J.R. Duflou, The Effects of Laser Radiation on the Residual Stress Levels of Single Point Incrementally Formed (SPIF) Parts, April 9-10, 2014, Bremen, Germany, Proceedings of the 4th International Workshop on Thermal Forming and Welding Distortion (IWOTE’14), p 83–92.

  24. A. Mohammadi, H. Vanhove, A. Van Bael, and J.R. Duflou, Bending Properties of Locally Laser Heat Treated AA2024-T3 Aluminium Alloy, Phys. Proc., 2012, 39, p 257–264

    Article  Google Scholar 

  25. E.O. Hall, The Deformation and Ageing of Mild Steel: II Characteristics of the Lüders Deformation, Proc. Phys. Soc. Sect. B., 1951, 64(9), p 742.

  26. R.G. Buchheit, R.R. Grant, R.F. Hlava, B. McKenzie, and G.L. Zender, Local Dissolution Phenomena Associated with S Phase (Al2CuMg) Particles in Aluminium Alloy 2024-T3, J. Electrochem. Soc., 1997, 144(8), p 2621–2628

    Article  Google Scholar 

  27. L. Priester, Precipitation at Grain Boundaries, Grain Boundaries: From Theory to Engineering, Vol 172, Springer, Netherlands, 2013, p 217–240.

  28. S. He, J. Gu, H. Sol, A. Van Bael, P. van Houtte, Y. Tunckol, and J.R. Duflou, Determination of Strain in Incremental Sheet Forming Process, Key Eng. Mater., 2007, 344, p 503–510

    Article  Google Scholar 

  29. P. Flores, L. Duchêne, C. Bouffioux, T. Lelotte, C. Henrard, N. Pernin, A. Van Bael, S. He, J. Duflou, and A.M. Habraken, Model Identification and FE Simulations: Effect of Different Yield Loci and Hardening Laws in Sheet Forming, Int. J. Plast., 2007, 23(9), p 420–449

    Article  Google Scholar 

  30. A. Mohammadi, H. Vanhove, A. Van Bael, and J.R. Duflou, Towards Accuracy Improvement in Single Point Incremental Forming of Shallow Parts Formed Under Laser Assisted Conditions, Int. J. Mater. Form., 2014, p 1–13.

  31. M.B. Silva, M. Skjødt, P.A.F. Martins, and N. Bay, Revisiting the Fundamentals of Single Point Incremental Forming by Means of Membrane Analysis, Int. J. Mach. Tool. Manu., 2008, 48(1), p 73–83

    Article  Google Scholar 

  32. P.F. Thomason, Three-Dimensional Models for the Plastic Limit-Loads at Incipient Failure of the Intervoid Matrix in Ductile Porous Solids, Acta. Metall., 1985, 33(6), p 1079–1085

    Article  Google Scholar 

  33. J.W. Martin, Fracture Behavior of Aged Alloys, Precipitation Hardening (Second Edition), J.W. Martin, Ed., Butterworth-Heinemann, Oxford, 1998, p 126–170

    Chapter  Google Scholar 

  34. W.M. Garrison and N.R. Moody, Ductile Fracture, J. Phys. Chem. Solids, 1987, 48(11), p 1035–1074

    Article  Google Scholar 

  35. R. Abbaschian and R. Reed-Hill, Physical Metallurgy Principles, SI Version, Cengage Learning, Boston, 2010, p 700–706

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Acknowledgments

The authors would like to acknowledge the financial support from the Fonds Wetenschappelijk Onderzoek-Vlaanderen (FWO) through Project G.0B44.13.

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Authors and Affiliations

  1. Department of Mechanical Engineering, KU Leuven, Leuven, Belgium

    Amirahmad Mohammadi, Hans Vanhove & Joost R. Duflou

  2. Department of Materials Engineering, KU Leuven, Leuven, Belgium

    Ling Qin, Marc Seefeldt & Albert Van Bael

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  1. Amirahmad Mohammadi
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  2. Ling Qin
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Correspondence to Amirahmad Mohammadi.

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Mohammadi, A., Qin, L., Vanhove, H. et al. Single Point Incremental Forming of an Aged AL-Cu-Mg Alloy: Influence of Pre-heat Treatment and Warm Forming. J. of Materi Eng and Perform 25, 2478–2488 (2016). https://doi.org/10.1007/s11665-016-2055-y

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  • DOI: https://doi.org/10.1007/s11665-016-2055-y

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