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Deformation rate response of an Al-Si alloy prepared from rapidly solidified powder

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Journal of Materials Shaping Technology

Abstract

A study on the deformation rate response of an important Al-Si-Cu-Mg alloy prepared from rapidly solidified powder is undertaken, through hot extrusion and tensile tests which cover a wide variation of strain rate. The individual effects of ram speed in extrusion and crosshead speed in tensile tests on the flow behavior of the material are analyzed. It is derived that the pressure requirement for extrusion is a combined function of ram speed (or strain rate) and temperature rise. The balance of the two factors gives an increase in extrusion pressure with rising ram speed—a result being different from that found in the extrusion of some other aluminum alloys. The tensile results obtained from the extruded material, using constant and incremental strain rate methods, prove that the flow stress of the alloy under study is more sensitive to strain rate than that of other aluminum alloys. Finally, a direct comparison between the two deformation processes is made in terms of the flow stress dependence of strain rate.

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Authors and Affiliations

  1. Laboratory of Materials Science, Delft University of Technology, Rotterdamseweg 137, 2628, AL Delft, The Netherlands

    J. Zhou, J. Duszczyk & B. M. Korevaar

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  1. J. Zhou
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  2. J. Duszczyk
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  3. B. M. Korevaar
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Zhou, J., Duszczyk, J. & Korevaar, B.M. Deformation rate response of an Al-Si alloy prepared from rapidly solidified powder. J. Materials Shaping Technology 8, 91–100 (1990). https://doi.org/10.1007/BF02833620

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