High Temperature Corrosion-Fatigue Test Method for Exhaust Valve Alloys 810033
A rotating beam fatigue test method was developed to determine the high-temperature corrosion-fatigue properties of valve alloys under cyclic stress in a simulated engine operating environment. The test results showed that microstructural modification of an alloy through heat treatment can significantly improve corrosion-fatigue properties. For test development purposes, Nimonic 80A was selected for testing and a mixture of lead compounds was used as the corrosive environment. This is a typical combination of alloy and environment found in heavy-duty spark-ignited engines. This test method may also be applicable to other corrosion-fatigue problems such as sulfidation in diesel exhaust valves.
Citation: Caird, S. and Trela, D., "High Temperature Corrosion-Fatigue Test Method for Exhaust Valve Alloys," SAE Technical Paper 810033, 1981, https://doi.org/10.4271/810033. Download Citation
Author(s):
Stephen B. Caird, David M. Trela
Pages: 13
Event:
SAE International Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1981Transactions-V90-A
Related Topics:
Exhaust valves
Diesel exhaust emissions
Test procedures
Heat treatment
Alloys
Spark ignition engines
Fatigue
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