Ductile fracture and extremely low cycle fatigue (ELCF) [1] are two common failure modes in aircraft engines and turbomachinery designs [2]; however, the linkage between these two failure modes under multi-axial loading conditions has never been systematically studied. Inconel 718 (IN718) is one type of high temperature alloys widely used in turbomachines. Specially designed specimens and tests...

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Yuri Biba is a Staff Aero Performance Engineer with Dresser-Rand Company, in Olean, New York. He has been with the company since 1992, involved in turbocompressor selections, revamps and testing, focusing on aerodynamic design, analysis, performance prediction, and optimization of centrifugal compressor components. Dr. Biba received his M.Sc. degree in Aeronautical Engineering (with Honors, 198...

The paper presents a probabilistic uncertainty evaluation method described in the Guide to Expression of Uncertainty Measurement (GUM) [1] and its application field Turbomachinery probe measurement techniques. All sources uncertainties contributing result are expressed terms probability distributions. Consequently, overall standard can be calculated using Gaussian error propagation formula. yie...