Abstract
The tensile behavior of Nicalon fiber-reinforced silicon carbide matrix composites (Nicalon/SiC) was investigated with the aid of nondestructive evaluation (NDE) techniques. The NDE techniques include ultrasonic testing (UT), X-ray computed tomography (CT), and infrared (IR) thermography. Before mechanical testing, UT C-scans were developed to investigate defect distributions and to detect variations in the internal flaws. X-ray CT was used to characterize the type of defects and the location of flaws in composites to compare with UT C-scan results. The IR thermography was employed to monitor temperature evolution during tensile testing. This article also investigated the feasibility of using multiple NDE techniques as a means of assessing integrity for Nicalon/SiC composites. Microstructural characterization was performed using scanning electron microscopy (SEM) to investigate failure mechanisms of Nicalon/SiC composites, and the results were compared with NDE data.
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Acknowledgments
This work was supported by the National Science Foundation, the Combined Research Curriculum Development (CRCD) Program, under Contract No. EEC-9527527, the Division of Design, Manufacture, and Industrial Innovation, under Contract No. DMI-9724476, and the Integrative Graduate Education and Research Training (IGERT) Program, under Contract No. DGE-9987548, to the University of Tennessee (UT), Knoxville, with Ms. Mary F. Poats, Dr. Delcie R. Durham, Dr. Wyn Jennings, and Dr. Larry Goldberg as contract monitors, respectively. Partial financial support for the publication of this work was given by the Korea Railroad Research Institute under Contract No. PK07007A.
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This article is based on a presentation given in the symposium entitled “Deformation and Fracture from Nano to Macro: A Symposium Honoring W.W. Gerberich’s 70th Birthday,” which occurred during the TMS Annual Meeting, March 12–16, 2006 in San Antonio, Texas and was sponsored by the Mechanical Behavior of Materials and Nanomechanical Behavior Committees of TMS.
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Kim, J., Liaw, P. Tensile Fracture Behavior of Nicalon/SiC Composites. Metall Mater Trans A 38, 2203–2213 (2007). https://doi.org/10.1007/s11661-007-9306-3
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DOI: https://doi.org/10.1007/s11661-007-9306-3