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Meeting Materials Science & Technology 2019
Symposium Failure Prevention and Unconventional Failures
Presentation Title The Failure Analysis & Prevention of a Large and Critical Extrusion Gearbox : Part 3 - Material, Microstructure & Heat Treatment : Curiosities of Some Gear Teeth
Author(s) Pierre Dupont, Donato Firrao, Paolo Matteis, Maria Rosa Pinasco, Giuseppina Ienco, Fabienne Delaunois, Véronique Vitry
On-Site Speaker (Planned) Donato Firrao
Abstract Scope In the continuation of 2 talks given last year and analyzing an industrial case carburized gear failure in a polymer extrusion machinery. Focus was done on the case study's complexity, the conditional answers that were given by the FAS Network to safely continue working with a partial broken teeth avoiding any production stops. This year the scope will be put over the metallurgical analysis of this gear teeth and peculiar C profile, as of the test results that were obtained and some detected abnormalities within the microstructure and the (micro-)hardness profile at the gear root of one of the gearbox pinion. A deep qualitative discussion based on test results obtained will be pursued and emphasis is made on the necessity to perform many different contradictory analysis to be able to statute clearly on the case. A true complex analysis where the expertise&methodology of the Failure Analyst plays a determinant role
Proceedings Inclusion? Definite: At-meeting proceedings

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Radiant Tube Heater Failure Analysis and Resulting Changes to NFPA 54
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The Unusual Case of a Not-so-Obvious Brake Line Failure
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