Strain Rate Sensitivity of Ultrafine Grained FCC- and BCC-Type Metals

Johannes May; Heinz Werner Höppel; Matthias Göken

doi:10.4028/www.scientific.net/MSF.503-504.781

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HomeMaterials Science ForumMaterials Science Forum Vols. 503-504Strain Rate Sensitivity of Ultrafine Grained FCC-...

Strain Rate Sensitivity of Ultrafine Grained FCC- and BCC-Type Metals

Abstract:

The dependence of the strain rate sensitivity (SRS) of α-Fe and Al 99.5, as typical representatives of fcc- and bcc-type metals, on the testing temperature and with respect to the microstructure is investigated. In particular, the differences between conventional grain size (CG) and ultrafine grain size (UFG) are pointed out. UFG Al 99.5 generally shows an elevated SRS compared to CG Al 99.5. In case of α-Fe the SRS of the UFG state is decreased at room temperature, but increased at 200 °C, compared to the CG state. It is shown that the SRS also influences the ductility of UFG-metals in tensile tests.

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Materials Science Forum (Volumes 503-504)

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781-786

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.503-504.781

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Online since:

January 2006

Authors:

Johannes May, Heinz Werner Höppel, Matthias Göken

Keywords:

Ductility, Equal-Channel Angular Pressing (ECAP), Severe Plastic Deformation (SPD), Strain Rate Sensitivity (SRS), Ultra Fine Grained Metal

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