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Accelerated Testing to Investigate Corrosion Mechanisms of Carburized and Carbo-Nitrided Martensitic Stainless Steel for Aerospace Bearings in Harsh Environments
Tribology Transactions ( IF 2.1 ) Pub Date : 2019-12-20 , DOI: 10.1080/10402004.2019.1685726
Armen Kvryan 1 , Nicholas A. Carter 1 , Hitesh K. Trivedi 2 , Michael F. Hurley 1
Affiliation  

Abstract Carburizable martensitic stainless steels (MSSs) are attractive candidates for bearings due to their high corrosion resistance, high hardness, and high temperature performance. Wear performance in tribocorrosion applications is strongly influenced by the surrounding environment. Electrochemical testing was used to evaluate three different surface treatments on AMS 5930 steel developed for advanced gas turbine engine bearing applications: low temperature (LTT), high temperature (HTT), and carbonitrided (CN). HTT had a higher corrosion rate that increased with time, whereas LTT and CN had lower corrosion rates that were stable over time. Accelerated testing revealed that surface treatment significantly influenced how corrosion propagated: HTT was more uniform; conversely, LTT and CN showed localized attack. Degradation mechanisms developed from electrochemical methods provide rapid insight into long-term wear behavior.

中文翻译:

用于研究在恶劣环境中用于航空轴承的渗碳和碳氮共渗马氏体不锈钢腐蚀机理的加速试验

摘要 可渗碳马氏体不锈钢(MSSs)由于其高耐腐蚀性、高硬度和高温性能而成为有吸引力的轴承候选材料。摩擦腐蚀应用中的磨损性能受周围环境的影响很大。电化学测试用于评估为高级燃气涡轮发动机轴承应用开发的 AMS 5930 钢的三种不同表面处理:低温 (LTT)、高温 (HTT) 和碳氮共渗 (CN)。HTT 具有随时间增加的较高腐蚀速率,而 LTT 和 CN 具有随时间稳定的较低腐蚀速率。加速测试表明,表面处理显着影响腐蚀的传播方式:HTT 更均匀;相反,LTT和CN表现出局部攻击。
更新日期:2019-12-20
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