Effect of different drilling techniques on high-cycle fatigue behavior of nickel-based single-crystal superalloy with film cooling hole
نویسندگان
چکیده
Abstract The flat plate specimens of nickel-based single-crystal superalloy with 14 film cooling holes, which made by different drilling techniques, were used to study the high-cycle fatigue (HCF) properties at 980°C in an ambient atmosphere. At same time, electrical discharge machining (EDM) a single hole also HCF under temperatures. and fracture micrographs analyzed scanning electron microscope. results indicated that techniques have great influence on life. limit millisecond laser is 353 MPa, while EDM 359 MPa electro-stream (ESM) 378 MPa. life decreases gradually temperature increasing. 900°C, 980°C, 1,050°C are 472, 430, 293 respectively. destruction typical multisource rupture, morphology includes three parts: cracks sources around hole, propagation zone along {001} planes, instant rupture {111} planes.
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ژورنال
عنوان ژورنال: High Temperature Materials and Processes
سال: 2021
ISSN: ['0334-6455', '2191-0324']
DOI: https://doi.org/10.1515/htmp-2020-0072