Failure analysis of a second stage blade in a gas turbine engine

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• 作者：E. Poursaeidi ; M. Aieneravaie ; M.R. Mohammadi
• 关键词：Blade failure ; Hot corrosion ; Fatigue failure ; Inconel 738LC ; Finite element
• 刊名：Engineering Failure Analysis
• 出版年：2008
• 出版时间：December 2008
• 年：2008
• 卷：15
• 期：8
• 页码：1111-1129
• 全文大小：4593 K

文摘

The failure of a second stage blade in a gas turbine was investigated by metallurgical and mechanical examinations of the failed blade. The blade was made of a nickel-base alloy Inconel 738LC. The turbine engine has been in service for about 73,500 h before the blade failure at 5:50 PM on 14 August 2004. Due to the blade failure, the turbine engine was damaged severely. The investigation was started with a thorough visual inspection of the turbine and the blades surfaces, followed by the fractography of the fracture surfaces, microstructural investigations, chemical analysis and hardness measurement.