[P] P132~P141

[P137] Effect of cooling rates after solution heat treatment on aging properties of Al-Zn-Mg alloys

*Shunsuke ARAKI¹, Tatsuya AONO², Tetsuya ANDO³, Mami MIHARA-NARITA⁴, Hideo YOSHIDA⁵, Ken-ichi IKEDA⁶, Yoshinori TAYU³ (1. Muroran Institute of Technology, 2. Muroran Institute of Technology, 3. Muroran Institute of Technology, 4. Nagoya Institute of Technology, 5. ESD laboratory, 6. Hokkaido University)

Keywords:Aluminum alloy、Precipitation hardening、Cooling rate、Aging property

焼入れ速度が低い場合の時効析出挙動や析出強化メカニズムを明らかにすることを目的とし，溶体化処理後の冷却速度が Al-Zn-Mg合金の時効特性に及ぼす影響を調査し，冷却速度が低い試料で高強度が得られた．