The purpose of this project was to evaluate Process Compensated Resonance Testing (PCRT) as a nondestructive evaluation method for ceramic balls. PCRT uses measured resonant frequencies of parts to detect surface and internal flaws. For ceramic balls, internal defects and bulk material property variations are detected by measuring shifts of resonant peaks to lower or higher frequencies. Surface defects are detected by measuring degeneracy in surface acoustic waves. A PCRT inspection detects both internal and external defects in a single sweep, and returns an automated pass/fail result.

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