Author: Kim W.J. Lee Y.S. Moon S.J. Hong S.H.
Publisher: Maney Publishing
ISSN: 1743-2847
Source: Materials Science and Technology, Vol.16, Iss.6, 2000-06, pp. : 675-680
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Abstract
The possibility of high strain rate superplasticity (HSRS) was examined over a wide range of temperatures in a powder metallurgy aluminium alloy 6061/SiCp composite with a relatively large SiC particle size of ~8 μm. A maximum tensile elongation of 350% was obtained at 600°C and 10-2 s-1. Tensile elongations over 200% were obtained in a narrow temperature range between 590 and 610°C at high strain rates of 10-2 and 10-1 s-1. The current testing temperature range could be divided into two regions depending on the rate-controlling deformation mechanism. Region I is in the lower temperature range from 430 to 490°C, where lattice diffusion controlled dislocation climb creep (