Effect of Maximum Temperature on the Thermal Fatigue Behavior of Superalloy GH536


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Thermal fatigue tests of superalloy GH536 were carried out at different maximum temperature. Three-dimensional numerical finite element computations were performed to simulate thermal fatigue test process. The crack initiation, propagation and thermal fatigue failure mechanism of GH536 plate at different maximum temperatures were obtained by experiments and numerical methods. Result shows that the crack initiation life is shortened and the crack growth rate is accelerated with the increase of the maximum temperature of thermal fatigue test. The numbers of appearing 1 mm length cracks are 180, 74 and 37, respectively, when the maximum temperature is 800°C, 850°C and 900°C respectively. So the thermal fatigue performance decreases with the increase of the maximum temperature. But in the thermal fatigue tests of different maximum temperature, the thermal fatigue crack initiation is all caused by a single crack initiation source, and the thermal fatigue cracks initiate transgranularly, develop and propagate intergranularly.



Edited by:

Prof. Xu Chen and Prof. Shan-Tung Tu




J. Chen et al., "Effect of Maximum Temperature on the Thermal Fatigue Behavior of Superalloy GH536", Applied Mechanics and Materials, Vol. 853, pp. 28-32, 2017

Online since:

September 2016




* - Corresponding Author

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