Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Elevated Temperature Fatigue Crack Growth in a Nickel Base Superalloy under Dwell Conditions
Corner crack growth was studied in Waspaloy at 550 to 650 C under cyclic (0.25 Hz) and 5 minute dwell at peak load conditions, both at R = 0.1. No significant effect of dwell in fatigue crack growth rate was found at 550 C, where predominantly transgranular cracking occurred. At 600 and 650 C, under dwell cycling a transition to entirely intergranular cracking was accompanied by a severe increase in crack growth rate. Using the change in temperature as a correlating parameter, dwell cycling behavior at 650 C is successfully predicted using a linear summation model based on static load and fatigue data.
Elevated Temperature Fatigue Crack Growth in a Nickel Base Superalloy under Dwell Conditions
Corner crack growth was studied in Waspaloy at 550 to 650 C under cyclic (0.25 Hz) and 5 minute dwell at peak load conditions, both at R = 0.1. No significant effect of dwell in fatigue crack growth rate was found at 550 C, where predominantly transgranular cracking occurred. At 600 and 650 C, under dwell cycling a transition to entirely intergranular cracking was accompanied by a severe increase in crack growth rate. Using the change in temperature as a correlating parameter, dwell cycling behavior at 650 C is successfully predicted using a linear summation model based on static load and fatigue data.
Elevated Temperature Fatigue Crack Growth in a Nickel Base Superalloy under Dwell Conditions
J. Byrne (Autor:in) / R. Hall (Autor:in) / M. Alabraba (Autor:in) / L. Grabowski (Autor:in) / I. W. Hussey (Autor:in)
1992
8 pages
Report
Keine Angabe
Englisch
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