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Mechanical properties of Al-Zn-Mg alloys investigated by microhardness measurements

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Abstract

One of the most simple and economic methods of testing the mechanical properties of alloys is the microhardness measurement. In the present paper we report on the results and the interpretation of experiments carried out on a series of AI-Zn-Mg alloys prepared from high purity base materials. The following results were obtained: (a) the incremental microhardness,ΔHV, was related to the microhardness,HV, of high purity Al and can be given asΔHV=264(Cmg−0.25Czn) wherec mg andC zn are the concentrations of Mg and Zn respectively, in the as-quenched state after solution heattreatment, (b) the ultimate tensile strength and the microhardness were correlated by the approximation:HV≅3σu.ΔHV was investigated in the light of the average radius and the volume fraction of zones forming at room temperature. On the basis of the micromechanism of plastic deformation further evidence was found to show that the shearing mechanism is responsible for strengthening by GP zones in AI-Zn-Mg alloys.

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Authors and Affiliations

  1. Institute for General Physics, Eötvös University, Budapest, Hungary

    A. Juhász, P. Tasnádi, I. Kovács & T. Ungár

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  1. A. Juhász
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  2. P. Tasnádi
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  3. I. Kovács
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  4. T. Ungár
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Juhász, A., Tasnádi, P., Kovács, I. et al. Mechanical properties of Al-Zn-Mg alloys investigated by microhardness measurements. J Mater Sci 16, 367–372 (1981). https://doi.org/10.1007/BF00738625

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  • DOI: https://doi.org/10.1007/BF00738625

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