Superplasticity and Deformation Mechanism of LD10 Aluminium Alloy


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The commercial hot-rolled bars of LD10 alloy (grain size 25~75µm) are pretreated via proper recrystallization annealing (temperature 380°C, 420°C and 460°C) and solution annealing (temperature 500°C). The average elongation is increased from 158% to 270%, 223%, 219% and 233% respectively and the maximum elongation is 321% (500°C, 3.3×10-4s-1). The test results show that the alloy can present certain superplasticity owing to structural effect of dynamic recrystallization refining during superplastic deformation of coarse-grained LD10 alloy. Large and deep cavities form in grain boundaries and result in intergranular fracture after larger superplastic tensile deformation. And a large amount of metal filaments appear on grain surfaces. The formation of filaments is attributed to viscous flow of solid-liquid mixture in grain boundaries caused by grain-boundary sliding. The appearance of solid-liquid mixture makes grain-boundary sliding easier.



Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie




H. Z. Guo et al., "Superplasticity and Deformation Mechanism of LD10 Aluminium Alloy", Materials Science Forum, Vols. 475-479, pp. 2941-2944, 2005

Online since:

January 2005




[1] M. Otsuka, S. Shibasaki and M. Kikuchi: Mater. Sci. Forum Vol. 233~234 (1997), p.193.

[2] E.M. Tale G.A. Henshall T.G. Nich and D.R. Lesuer: Metall. Trans. Vol. 29A (1998), p.1084.

[3] H. Watanabe A,H. Tsutsui B,T. Mukai: International Journal of Plasticity Vol. 17 (2001), p.387.

[4] Bai Bingzhe: Scripta Metallurgica et Materialia Vol. 26 (1992), p.743.

[5] Jin Quanlin, Bai Bingzhe et al: Superplastic Forming (Edited by C.H. Hamilton), (1988), p.97.

[6] Y. Takayama,T. Tozawa and H. Kato: Acta mater Vol. 47 (1999), p.1263.

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