Study on the dynamic and static softening phenomena in Al–6Mg alloy during two-stage deformation through interrupted hot compression test |
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Affiliation: | 1. Department of Mechanical Engineering, Bilkent University, Ankara 06800, Turkey;2. Institute of Applied Mechanics, University of Erlangen-Nuremberg, Egerland Str. 5, Erlangen 91058, Germany;3. Glasgow Computational Engineering Centre, School of Engineering, University of Glasgow, Glasgow G12 8QQ, United Kingdom |
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Abstract: | The dynamic and static softening phenomena in Al–6Mg alloy were studied through interrupted two-stage hot compression test performed isothermally at 480 °C and strain rate range of 0.001–0.1 s?1. The interruptions of 29 and 90 s were considered when the true strain reached 0.5. It was concluded that the effect of static softening on the flow stress was not highlighted by extending the interruption at a constant strain rate. Also, it was exhibited that softening rate highly enhanced with the strain rate decrement at a constant time. Moreover, the static and dynamic recrystallization was revealed as the dominant softening mechanisms at low and high strain rates, respectively. |
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Keywords: | Al–6Mg alloy Dynamic softening Hot deformation Interrupted deformation Compression test Flow stress |
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