Failure analysis of the 1st stage blades in gas turbine engine

IMR OpenIR

	Failure analysis of the 1st stage blades in gas turbine engine
	S. Qu; C. M. Fu; C. Dong; J. F. Tian; Z. F. Zhang
	2013
发表期刊	Engineering Failure Analysis
ISSN	1350-6307
卷号	32 页码:292-303
摘要	The failure analysis of the first stage blades in a gas turbine made of nickel-base Inconel 738 is presented. The failure of the gas turbine occurred at approximately 1069 operating hours with 58 starts after the last overhaul. Several examinations were carried out to identify the blade failure's root cause: macroscopic inspection, microscopic examination, and metallographic analysis. It is found that one of four fractured blades (the No. 62 blade) had initially cracked by a fatigue mechanism over a period of time, and then fractured by the overload at last moment and the other three fractured blades (the No. 63, No. 1 and No. 2 blades) are all instant fracture with the dendrite morphology, which resulted in the initiation of fatigue crack at the porosity metallurgical defects in the trailing edge of No. 62 blade due to the stress concentration aroused by these porosity defects and cavitations. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
部门归属	[qu, s. ; fu, c. m. ; dong, c. ; tian, j. f. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; qu, s (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; squ@imr.ac.cn
关键词	Turbine Blades Failure Fatigue Crack Stress Concentration Fracture Fatigue
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71440
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Qu,C. M. Fu,C. Dong,et al. Failure analysis of the 1st stage blades in gas turbine engine[J]. Engineering Failure Analysis,2013,32:292-303.
APA	S. Qu,C. M. Fu,C. Dong,J. F. Tian,&Z. F. Zhang.(2013).Failure analysis of the 1st stage blades in gas turbine engine.Engineering Failure Analysis,32,292-303.
MLA	S. Qu,et al."Failure analysis of the 1st stage blades in gas turbine engine".Engineering Failure Analysis 32(2013):292-303.