Superplasticity Effect Demonstrated by Gas Forming Hot Bent AA5XXX Sheets into V-Shaped Trough Containing Uneven Concavities

Abstract:

Using low gas pressure as a tool to form metal sheets is certainly feasible. However, the intrinsic flow properties of metal sheet are often a key factor in determining degree of formability, which has not been emphasized or explained well. Most metals, for examples aluminum alloys, can be either superplastic or non-superplastic depending on their original processing history or route (consequently, yielding suitable microstructure) and forming conditions, i.e. mostly temperature and strain rate. This superplasticity effect is clearly demonstrated by gas forming superplastic AA5083 and non-superplastic AA5052 into a V-shaped deep trough containing uneven concavities. The results show the superiority of superplastic material when harsh product standard is required.

• Periodical: Materials Science Forum (Volumes 838-839)
• Pages: 592-596
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.838-839.592
• Online since: January 2016
• Authors: Chia Hung Chen, Jian Yih Wang*, Yiin Kuen Fuh, Shyong Lee, Chi Liu, Chun Lin Chu
• Keywords: Aluminium Alloy, Concavity, Gas Forming, Superplastic

References

[1] Hefti L.D., Commercial Airplane Applications of Superplastically Formed AA5083 Aluminum Sheet, J. of Materi Eng and Perform, 16(2) 2007, pp.136-141.

DOI: 10.1007/s11665-007-9023-5

[2] Barnes A.J., Superplastic Forming 40 Years and Still Growing, J. of Materi Eng and Perform, 16(4) 2007, pp.440-454.

DOI: 10.1007/s11665-007-9076-5

[3] J.G. Schroth, Hans M. Brueggeman, and Narinder P. Grewal, Quick plastically formed aluminum doors: Design and performance, J. of Materi Eng and Perform, (2007) 16: 3, pp.339-348.

DOI: 10.1007/s11665-007-9059-6

[4] P.E. Krajewski and J.G. Schroth, Overview of quick plastic forming technology. Materials Science Forum, 551-552: 3-12 (2007).

DOI: 10.4028/www.scientific.net/msf.551-552.3

[5] The deformation and processing of structual materials, edited by Z. Xiao Guo, p.301.

[6] Lee S., Lan H.C., Lee J., Wang J.Y., Huang J.C., Chu C., Gas Forming a V-Shape Aluminum Sheet into a Trough of Saddle-Contour, J. of Materi Eng and Perform, 21(11) 2012, pp.2290-2294.

DOI: 10.1007/s11665-012-0179-2

[7] Lan H.C., Fuh Y.K., Lee S., Chu C.L., Chang T.C., Two-Stage Superplastic Forming of a V-Shaped Aluminum Sheet into a Trough with Deep and Irregular Contour, J. of Materi Eng and Perform, 22(8) 2013, pp.2241-2246.

DOI: 10.1007/s11665-013-0511-5

[8] Luckey S.G., Friedman P.A., Weinmann K.J., Design and experimental validation of a two-stage superplastic forming die, Journal of Materials Processing Technology, 209(4) 2009, pp.2152-2160.

DOI: 10.1016/j.jmatprotec.2008.05.019