Creep-Fatigue Life and Cyclic Constitutive Relation of MAR-M247 Directionally Solidified Superalloy at High Temperature
This paper describes the effect of solidification direction on creepfatigue life of Mar-M247 directionally solidified (DS) superalloy. The specimen of which axis agrees to the solidification direction exhibited the maximum life, while the specimen which has 45° against the solidification direction exhibits the minimum life. Transversely directed specimen had the intermediate life. The difference in creep-fatigue life due to the loading direction was resulted from the anisotropy of Young’s modulus. A life prediction method for DS superalloy, considering the anisotropy of the Young’s modulus, was proposed and successfully applied to the creep-fatigue data.
KeywordsCreep Strain Solidification Direction Creep Damage Directionally Solidify Total Strain Range
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- 1.Nye, J.F.: Physical properties of crystals, Oxford University Press, 1957, pp.143-145.Google Scholar
- 2.Hasebe, T.; Sakane, M.; Ohnami, M: High temperature low cycle fatigue and cyclic constitutive relation of Mar-M247 directionally solidified superalloy, Jour. Engng. Mater. Techno., Trans. ASME (to appear).Google Scholar
- 3.Hasebe, T; Sakane, M.; Ohnami, M.: Elastic Anisotropy of Directionally Solidified Superalloy. Jour. Engng. Mater. Techno. Trans. ASME (to appear).Google Scholar