The need of thermomechanical fatigue testing is strongly indicated by the actual working conditions of various machine components used at high temperatures. In many cases, temperature is not uniformly distributed on a component and it also changes over the course of time. In these conditions, isothermal testing has been shown to be unsuitable and life prediction must be based on more complex testing procedures. Results of bithermal testing (BT) of the mechanical behavior of FSX 414 at high temperature are presented. Experimental problems are addressed, with emphasis placed on cyclic behavior. Cyclic behavior is found to be basically a function of temperature. The application of some life prediction methods is investigated. Manson-Coffin and Ostergren laws are fitted to the experimental results obtained.
Bithermal Fatigue Testing: Experimental and Prediction Problems / A.Del Puglia; F.Pratesi; G.Zonfrillo. - STAMPA. - (1996), pp. 47-53. (Intervento presentato al convegno Int. Symposium on “Fatigue under thermal and mechanical loading: mechanism, mechanics, and modeling” tenutosi a Petten (The Netherlands) nel 22-24 May 1995) [10.1007/978-94-015-8636-8_5].
Bithermal Fatigue Testing: Experimental and Prediction Problems
DEL PUGLIA, ALDO;PRATESI, FRANCO;ZONFRILLO, GIOVANNI
1996
Abstract
The need of thermomechanical fatigue testing is strongly indicated by the actual working conditions of various machine components used at high temperatures. In many cases, temperature is not uniformly distributed on a component and it also changes over the course of time. In these conditions, isothermal testing has been shown to be unsuitable and life prediction must be based on more complex testing procedures. Results of bithermal testing (BT) of the mechanical behavior of FSX 414 at high temperature are presented. Experimental problems are addressed, with emphasis placed on cyclic behavior. Cyclic behavior is found to be basically a function of temperature. The application of some life prediction methods is investigated. Manson-Coffin and Ostergren laws are fitted to the experimental results obtained.
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