[P] 第8分野　構造材料　P114～P135

[P126] The change of mechanical properties at different aging temperatures when adding Cu and Ag in Al-Zn-Mg alloy

○Nguyen Van Ha¹, Tsuchiya Taiki¹, Seungwon Lee¹, Abrar Ahamed³, Ikeno Susumu², Matsuda Kenji¹ (1. Univ. of Toyama, 2. Univ. of Toyama Professor Emeritus, 3. Advanced Aluminum International Research Center)

Keywords:

Al-Zn-Mg,electron microscope,precipitate,mechanical properties

Al–Zn–Mg alloys are age-hardenable materials. This study compared an Al–4Zn–2Mg (at%) alloy with 0.5 wt% Cu or Ag additions to a base alloy. The 0.5 wt% Ag alloy showed the highest tensile strength, consistent with hardness results, while elongation depended on aging temperature and fracture behavior observed by SEM.