Heterogeneous microstructure and failure analysis of yaw gear rings

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Abstract

The microstructure and hardness of two cracked and failed steel (42CrMo4) teeth from two different yaw rings have been investigated. It is shown that the surface quenching and tempering treatments introduce heterogeneous microstructures with a low-temperature tempered hard martensite surface layer and a high-temperature tempered matrix. This is common to both teeth, however, the gradient microstructure and hardness are different for these two yaw rings. It is suggested that this difference in gradient strongly affects cracking and failure. The failure mechanisms for the two teeth are discussed based on the microstructure and hardness analysis.
Original languageEnglish
Article number012055
JournalIOP Conference Series: Materials Science and Engineering
Volume1249
Issue number1
Number of pages6
ISSN1757-8981
DOIs
Publication statusPublished - 2022
Event42nd Risø International Symposium on Materials Science - Risø, Denmark
Duration: 5 Sep 20229 Sep 2022
https://www.conferencemanager.dk/42ndsymposium/program

Conference

Conference42nd Risø International Symposium on Materials Science
Country/TerritoryDenmark
CityRisø
Period05/09/202209/09/2022
Internet address

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