열처리공학회지 (Journal of the Korean Society for Heat Treatment)
- 제10권2호
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- Pages.81-92
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- 1997
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- 1225-1070(pISSN)
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- 2508-4046(eISSN)
Al-Mg합금의 압연변수에 다른 미세구조의 변화와 고온인장특성
The effects of rolling process on microstructures and high temperature tensile properties of Al-Mg alloy
- Kim, Tae-Kue (Department of Metallurgical Engineering, Korea University) ;
- Jeon, C.H. (Department of Metallurgical Engineering, Korea University) ;
- Kwun, S.I. (Department of Metallurgical Engineering, Korea University) ;
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Park, Jong-Woo
(Korea Institute of Science and Technology)
- 발행 : 1997.06.30
초록
The effect of alloying elements, precipitate size, its distribution, and dislocation substructure resulted from warm rolling or cold rolling in the superplastic Al-Mg alloy system was investigated. One of the major requirements for fine structure superplasticity is that the grain size should be very small. Fine grain structure is controlled by the dislocation substructure and the dynamic recrystallization during hot or warm working. The recovery of Al-Mg base alloys was constrained resulting in relatively high dislocation density when the alloys were warm rolled. In particular, Al-Mg-Zr alloy exhibited the smallest sub-grain size among Al-Mg alloys containing Mn, Cu, Zr as a third element. The Al-Mg-Mn alloy cold rolled 80% after hot rolling showed the maximun strain rate sensitivity exponent, m, of 0.75 under strain rate of
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