抄録
This paper describes examination of the high temperature fatigue lives on gas turbine materials for combustors using a plane bending fatigue testing method It is important to examine how in-service operation affects the high temperature fatigue lives on combustor materials to maintain the integrity of gas turbines. Gas turbine combustors for power generation are consisted of thin plates by Ni-base superalloys. Therefore, It could be difficult to evaluate fatigue life using a uniaxial tension-compression testing method by round bar specimens Thin plate specimens were prepared from inner side plates of the combustors. The plane bending fatigue tests using thin plate specimens were conducted at high temperature. Low-cycle fatigue lives in various regions of the combustors at 850℃ were obtained. The plane bending fatigue testing method could be a useful tool to evaluate the degradation of combustor materials in-service.
