열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제12권2호
  • /
  • Pages.129-135
  • /
  • 1999
  • /
  • 1225-1070(pISSN)
  • /
  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
권호 표지

Ag 첨가가 7050 Al합금의 기계적 성질에 미치는 영향

Effect of Ag Addition on the Mechanical Properties of 7050 Al Alloy

  • 곽서희 (고려대학교 공과대학 금속공학과) ;
  • 정영훈 (한국과학기술연구원 재료연구부) ;
  • 권숙인 (고려대학교 공과대학 금속공학과) ;
  • 조권구 (고려대학교 공과대학 금속공학과) ;
  • 신명철 (한국과학기술연구원 재료연구부)
  • Kwak, S.H. (Dept. of Metallurgical Engineering, Korea University) ;
  • Chung, Y.H. (Mater. Sci. & Tec. Div, Korea Institute of Science and Technology) ;
  • Kwun, S.I. (Dept. of Metallurgical Engineering, Korea University) ;
  • Cho, K.K. (Dept. of Metallurgical Engineering, Korea University) ;
  • Shin, M.C. (Mater. Sci. & Tec. Div, Korea Institute of Science and Technology)
  • 발행 : 1999.06.30
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초록

The effects of Ag addition on the microstructures and mechanical properties of 7050 Al alloy were investigated. Various homogenizing and aging treatments were carried out to analyze the controversial effects of Ag in 7050 Al alloy. Transmission electron microscopy(TEM) was used for microstructural analysis. The hardening precipitates(${\eta}^{\prime}$) become finer with Ag addition. It suggests that Ag promotes easier nucleation of ${\eta}{\prime}$. The strength of overaged Ag bearing alloys are higher than that of Ag free alloy. Hardening precipitates(${\eta}^{\prime}$) in Ag bearing alloys are smaller than that of Ag free alloys, because the growth rate of ${\eta}^{\prime}$ during overaging stage is lower in Ag bearing alloys.

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