| Effects of cyclic loading on temperature evolution of ULTIMET superalloy: experiment and theoretical modeling |
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| 作者单位： | L.Jiang,P.K.Liaw,C.R.Brooks(Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA);H.Wang(Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA);D.L.Klarstrom(Haynes International Inc., Kokomo, IN 46904, USA) |
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| 摘 要： |
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Effects of cyclic loading on temperature evolution of ULTIMET superalloy: experiment and theoretical modeling |
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| Authors: | LJiang HWang PKLiaw CRBrooks DLKlarstrom |
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| Abstract: | High-speed, high-resolution infrared t hermography, as a non-contact, full-field, and nondestructive technique, was used to study the temperature variations of a cobalt-based ULTIMET alloy subjected to cyclic fatigue. During each fatigue cycle, the temperature oscillations, which were due to the thermal-elastic-plastic effects, were observed and related to stress-strain analyses. The change of temperature during fatigue was utilized to reveal the accumulation of fatigue damage . A constitutive model was developed for predicting the thermal and mechanical responses of ULTIMET alloy subjected to cyclic deformation. The model was constru cted in light of internal-state variables, which were developed to characterize the inelastic strain of the material during cyclic loading. The predicted stress -strain and temperature responses were found to be in good agreement with the e xperimental results. |
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| Keywords: | fatigue thermography temperature constitutive model NDE superalloy |
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