Category Title
Gas turbines blade failures can have a major economic impact due to downtime and corrective maintenance costs. Failure analysis is required to reduce the cost of operation by preventing future failures. The goal of root cause failure analysis (RCFA) is to identify the cause and to avoid recurrence. High cycle fatigue plays a major role in a good number of failures and in some cases accounts for more mechanical failures than any other mechanism. This paper presents typical methodologies carried out to conduct failure analysis of gas turbine blade failures due to high cycle fatigue. Specific analyses are referenced to steps in the RCFA process. Tools available for assisting failure analysis are also provided in this paper. Forensic investigation, metallurgical examination, and dynamic analysis are important parts of failure investigations when studying blade HCF failures. An important objective of RCFA is to break the cause chain and correct current problem (corrective action). Preventive action shall be taken to prevent other similar occurrences. Advantage of the opportunity provided by the identification of contributing causes can be taken. Evaluate each solution is necessary to determine how effective the solution will be at preventing a future occurrence. Also, practicality needs to be taken into account. How realistic the solution with respect to additional cost, time, influence, technical requirements, etc. is of great importance.
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List Price $195.00