• effect of zr addition on properties of al–mg–si aluminum alloy used for all aluminum alloy conductor

    نویسندگان :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 527
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the effects of zr addition on mechanical property in the aged al–mg–si alloy exposed to thermal-resistant treatment (180–250 °c) have been studied by using both brinell hardness tests and tensile tests. the softening process at 180 °c and 230 °c has been investigated by transmission electron microscope (tem). the arrhenius model is introduced to simulate the strength evolution in the thermal-resistant treatment. the results show that tensile strength and thermal-resistant property are improved by addition of zr, and both the brinell hardness and tensile strength could maintain no less than 90% of their initial values when the alloy is exposed to heat treatment at 180 °c for 400 h and 230 °c for 2 h. the presence of rod-shaped phases and coarsening particles results in decreasing the hardness of the sample. the relationship between thermal-resistant life and temperature is derived by the arrhenius model. when the al–mg–si–zr alloy is heated at 130 °c, the duration described in the arrhenius plot could reach to 40 years.

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