Proceedings of the Korean Nuclear Society Conference (한국원자력학회:학술대회논문집)
- 1997.05b
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- Pages.123-128
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- 1997
Effect of Heat Treatment on Fatigue Crack Growth Rate of Inconel 690
- Kim, Young-Ho (Korea Electric Power Research Institute) ;
- Lee, Byong-Whi (Korea Advanced Institute of Science and Technology Department of Nuclear Engineering)
- Published : 1997.05.01
Abstract
The effects of heat treatment on fatigue crack growth rates (FCGRs) of Inconel 690 have been investigated in terms of carbide morphology and grain size. Cycling tests in air at room temperature have shown that FCGR in low stress intensity factor range (ΔK) region can be effectively reduced by increasing the grain boundary carbide precipitate size and grain size. Decrease in FCGR is attributed to the crack tip blunting at the precipitates of grain boundary chromium carbides.
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