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http://dx.doi.org/10.5139/JKSAS.2018.46.10.806

The Study for Fracture in the First Stage Blade of Aircraft Engine  

Yoon, Youngwoung (Department of Aerospace Engineering, Pusan National University)
Park, Hyoungkyu (Department of Aerospace Engineering, Pusan National University)
Kim, Jeong (Department of Aerospace Engineering, Pusan National University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.46, no.10, 2018 , pp. 806-813 More about this Journal
Abstract
The fracture of a turbine blade of aerospace engine is presented. Although there are a lot of causes and failure modes in blades, the main failure modes are two ways that fracture and fatigue. Degradation of blade material affects most failure modes. Total propagation of failure in this study specifies failure of fracture type. Some section appears fatigue mode. Especially since this study describes analysis of failure for blade in high temperature, it can be a case in point. Analysed blade is Ni super alloy. Investigations of blade are visual inspection, material, microstructure, high temperature stress rupture creep test, analysis and fracture surface, etc. The root cause for fracture was stress rupture due to abnormal thermal environment. Thermal property of Ni super alloy is excellent but if each chemical composition of alloys are different due to change mechanical properties, selection of material is very important.
Keywords
Degradation of material; Stress Rupture; Inter Granular Fracture; Inter Dendritic Fracture; Alloy Depletion;
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