Grass Mower Failure

Metallurgical failure analysis was requested after a large grass mower blade failure. Macro and microscopic examination along with metallurgical analysis of the failed blade revealed that cracks introduced during the heat treating process were to blame for the failure. The cracks during heat treatment were due to poor quality control on the part of the mower blade manufacturer.

Photograph A: Mower blade cracks introduced during heat treating process.

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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