28th Congress of the International Council of the Aeronautical Sciences, 23 - 28 September 2012, Brisbane, Australia
Paper ICAS 2012-7.3.3

LCF BEHAVIOR AND LIFE EVALUATION OF A SINGLE CRYSTAL NICKEL BASE SUPERALLOY UNDER DIFFERENT DWELL CONDITION

H. C. Yu, Y. Li, S. C. Zhang, X. R. Wu
Beijing Inst. of Aeronautical Materials, China

Keywords: crystallographic orientation, low cycle fatigue, life prediction, single crystal superalloy, strain dwell

LCF tests were conducted at elevated temperatures under different dwell conditions on a single crystal nickel base superalloy with [001], [011] and [111] orientations. The cyclic deformation features were analysed and a lifing model was proposed to evaluate the fatigue life. The prediction agrees well with experimental results.

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