Studying thermomechanical fatigue of Hastelloy X using digital image correlation

Mallory Casperson, Jay Carroll, Wael Abuzaid, John Lambros, Huseyin Sehitoglu, Mike Spottswood, Ravinder Chona

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Hastelloy X, a nickel based superalloy, has been extensively used in the past for high temperature applications. However, less is known about its thermomechanical fatigue response compared to other structural metals. Generally, the relation between microscale and macroscale is vital in order to identify specific phenomena that contribute to the cracked component fatigue lifetime. In this work, Hastelloy X notched samples were used to investigate fatigue crack nucleation near the notch and subsequent fatigue crack growth. Isothermal experiments at varying temperatures (up to 1,000 °C) were performed while the specimen was fatigue loaded to advance the crack. Macroscale Digital Image Correlation (DIC) was performed on images taken at various stages of crack growth. In addition, using images obtained directly behind the crack tip, microscale DIC was used to quantify the effects of crack closure. The interaction of crack closure and far-field loading was investigated as a function of temperature. The combination of full-field macroscale and near-tip microscale measurements will aid in the development and understanding of a multiscale fatigue crack growth model.

Original languageEnglish (US)
Title of host publicationExperimental and Applied Mechanics - Proceedings of the 2010 Annual Conference on Experimental and Applied Mechanics
Pages575-578
Number of pages4
Volume6
StatePublished - Dec 1 2011
Event2010 Annual Conference on Experimental and Applied Mechanics - Indianapolis, IN, United States
Duration: Jun 7 2010Jun 10 2010

Other

Other2010 Annual Conference on Experimental and Applied Mechanics
CountryUnited States
CityIndianapolis, IN
Period6/7/106/10/10

ASJC Scopus subject areas

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

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