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  • Improving the casting properties of high-strength aluminium alloys
    Vojtěch, Dalibor ; Šerák, Jan ; Ekrt, Ondřej
    Al-Zn-Mg-Cu alloys are examples of high-strength alloys. After age-hardening they often possess tensile strengths of more than 500 MPa. However, their casting properties are relatively poor as a ... result of solidification intervals that are too wide. Therefore, they often require an extrusion, rolling, or forging treatment, and the production of small series of special parts can, as a consequence, be very expensive. In this study, an improvement in the castability and a reduction of the hot-tearing tendency was achieved byadding small amounts of appropriate elements (Ni, Mg and Si), which form a quasi-eutectic microstructure to reduce the solidification interval of the Al-Zn-Mg-Cu alloys. This improvement is demonstrated by a comparison of the casting properties of the quasi-eutectic Al-Zn-Mg-Cu-Ni-Si alloy with the AlZn[sub]7Mg[sub]2Cu[sub]1 and AlSi[sub]10 alloys. In addition, an appropriate heat-treatment procedure, which ensures the optimum mechanical properties, is described.
    Vir: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 38, št. 1/2, jan.-apr. 2004, str. 99-102)
    Vrsta gradiva - članek, sestavni del
    Leto - 2004
    Jezik - angleški
    COBISS.SI-ID - 343466

    Povezava(-e):

    Digitalna knjižnica Slovenije - dLib.si

vir: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 38, št. 1/2, jan.-apr. 2004, str. 99-102)

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