Influence of Temperature and Strain Rate on the Mechanical Behaviour of Aluminium Alloy AA6060

Vincent Vilamosa; Arild H. Clausen; Odd Sture Hopperstad; Tore Børvik; Svein Skjervold

doi:10.4028/www.scientific.net/MSF.794-796.520

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HomeMaterials Science ForumMaterials Science Forum Vols. 794-796Influence of Temperature and Strain Rate on the...

Influence of Temperature and Strain Rate on the Mechanical Behaviour of Aluminium Alloy AA6060

Abstract:

In an attempt to improve the constitutive models for 6xxx aluminium alloys at high temperatures and high strain rates, a comprehensive test series has been carried out for AA6060. Uniaxial tension tests were performed at various strain rates from 0.01 s^-1 to 1000 s^-1 and temperatures from 20 °C to 350 °C. The tests were carried out using a standard tensile machine for low to moderate strain rates and a split-Hopkinson tension bar (SHTB) system for high strain rates. In both cases, an induction apparatus was used to heat the sample while local deformation measurements were obtained with a high-speed camera and used to estimate the true strain beyond necking. Strong coupling between the influence of strain rate and temperature on the stress-strain behaviour was found. At room temperature, the strain rate has a minor effect on the behaviour of AA6060. On the other hand, a significant increase of the yield stress and work-hardening with strain-rate is observed for temperatures above (K), being the melting temperature; i.e., above 673 K.

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Periodical:

Materials Science Forum (Volumes 794-796)

Pages:

520-525

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.794-796.520

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Online since:

June 2014

Authors:

Vincent Vilamosa*, Arild H. Clausen, Odd Sture Hopperstad, Tore Børvik, Svein Skjervold

Keywords:

Elevated Temperatures, High Strain Rate, Local Strain Measurements, Tensile Test, Thermo-Viscoplastic Behaviour

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References

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