Analysis of fatigue tested IC engine exhaust valves

Suresh Kumar, M and Madan, M and Venkataswamy, MA and Parameswara, MA and Sujata, M and Bhaumik, SK (2005) Analysis of fatigue tested IC engine exhaust valves. Project Report. National Aerospace Laboratories, Bangalore.

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Three rotating bending fatigue tested valves identified as A-2, A-3 and A-4 (part No. 84C640016) were sent to the laboratory for examination. The failure in valves A-2 and A-4 was found to be at the neck region as expected according to the test design. The failure in valve A-3 was at the weld, which was unusual since the maximum bending moment on the valve during the test was at the neck region. Examination revealed that the failure in this valve (A-3) was due to presence of a nonmetallic inclusion at the weld interface. Analysis shows that the inclusion had resulted due to contamination of the surface (s) during the fabrication of the valve. No metallurgical abnormalities in the raw material were responsible for the failure.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: IC engine;exhaust valve;fatigue;inclusion
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Mrs Manoranjitha M D
Date Deposited: 22 Aug 2011 05:01
Last Modified: 22 Aug 2011 05:01

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