The Effect of Solid Solution Heat-Treatment Temperature on the Tensile Property in Intermediate Thermo-Mechanical Treated Al-Li Alloys

중간가공열처리한 AI-Li계 합금의 인장성질에 미치는 용체화처리온도의 영향

  • Yoo, C.Y. (Department of Metallurgical Engineering, Chonbuk National University) ;
  • Lee, K.B. (Department of Metallurgical Engineering, Chonbuk National University)
  • 유창영 (전북대학교 공과대학 금속공학과) ;
  • 이규복 (전북대학교 공과대학 금속공학과)
  • Published : 1991.03.30

Abstract

In this study, the effect of solution treatment temperature on the tensile property in intermediate thermo-mechanical treated Al-Li alloys are investigated. After the intermediate thermo-mechanical treated Al-Li, Al-Li-Mg and Al-Li-Mg-Zr alloys were solution treated at various temperatures (500, 520 and $540^{\circ}C$), these were aged at $190^{\circ}C$, $240^{\circ}C$ and tested tensile properties. The results obtained from the experiment are as follows ; 1) The optimum solution heat-treatment temperature is $540^{\circ}C$ for a Al-Li alloy, and the recrystallized grain size is about $70{\mu}m$. 2) The optimum solution heat-treatment temperature is $500^{\circ}C$ for a Al-Li-Mg alloy, and the recrystallized grain size is the most coarse in all alloys. 3) The tensile property is independent of the solution treatment temperature in a Al-Li-Mg-Zr alloy, and the recrystallized grain size is the finest owing to addition of Zr.

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