Journal of the Korean Society for Heat Treatment (열처리공학회지)
- Volume 4 Issue 4
- /
- Pages.24-33
- /
- 1991
- /
- 1225-1070(pISSN)
- /
- 2508-4046(eISSN)
The Effect of Thermomechanical Treatment on the Microstructural Changes and Fatigue Properties in 7050 Al Alloy
7050 AI 합금의 가공열처리가 미세조직변화와 피로성질에 미치는 영향
- Kim, M.H. (Department of Metallurgical Engineering, Korea University) ;
- Kwun, S.I. (Department of Metallurgical Engineering, Korea University)
- Published : 1991.12.31
Abstract
The effects of thermomechanical treatments on microstructure and fatigue properties of 7050 Al alloy were investigated. The precipitation kinetics changed to a faster rate due to cold deformation employed in this special TAHA thermomechanical treatments including pre-aging, plastic deformation and two step final-aging. The G.P. zones in the under-aged condition were cut by dislocations and dissolved during the plastic deformation. During the low cycle fatigue, the T6' condition showed cyclic hardening behavior whereas the TMT5, TMT27 and T76 conditions showed cyclic softening at above 0.7% total strain amplitudes. The
Keywords