【摘 要】
：
Al-Zn-Mg alloys are widely used in aircraft and automotive industries for structure components because of exceptionally high specific strength in the fully aged condition.Precipitation sequence for Al
【机 构】
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Graduate School of Science and Engineering for Education, University of Toyama, Japan
【出 处】
：
15th International Conference on Aluminium Alloys(ICAA15)(第十
论文部分内容阅读
Al-Zn-Mg alloys are widely used in aircraft and automotive industries for structure components because of exceptionally high specific strength in the fully aged condition.Precipitation sequence for Al-Zn-Mg alloy is generally described as follows: S.S.S.S.→G.P.zone → metastable η→ stable η (MgZn2).When Zn/Mg ration is lower, metastable Tand stable T (Al2Mg3Zn3) precipitate from G.P.zone.It is well known that Cu is the major alloying element for high strength Al-Zn-Mg alloy because Cu forms S (Al2CuMg) phase and θ (CuAl2) phase.In this work, six kinds of Al-Zn-Mg(-Cu) alloys have different Zn/Mg ratio (1/2, 1, and 2) were prepared to investigate the role of Zn/Mg ratio and Cu in aging behavior of Al-Zn-Mg-Cu alloy.
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