Consumer Product Failures




		Shaft Failure Metallurgical failure analysis was requested after a company experienced several identical shaft failures. Macro and microscopic examination revealed that metal bending fatigue was to blame for the failures. The metal fatigue was due to an inadequate filet radius at a diameter change in the subject shaft. The inadequate radius was due to a manufacturing error. Photograph A: Overall view of failed shaft. Photograph B: Close-up view of the two halves of the failed shaft. Back to top
	Dr. R. Craig Jerner, Ph.D., PE specializes in accident investigation and metallurgical failure analysis, with over 30 years experience as a metallurgical consultant and accident investigator. He has testified as a metallurgical expert in over 250 depositions and more than 70 court appearances. If you or someone you know should need the services of Dr. Jerner and J.E.I. Metallurgical, please visit our web site at the buttons below, or e-mail Dr. Jerner --- r.c.jerner@metallurgist.com

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