Experimental and Simulated Analysis of Failure Mechanism of 0Cr17Ni4Cu4Nb Stainless Steel Blade

Jie Xu; Lei Zhang; Yanlong Wang; Weiwei Gu

doi:10.1007/s11668-019-00758-z

Experimental and Simulated Analysis of Failure Mechanism of 0Cr17Ni4Cu4Nb Stainless Steel Blade

Jie Xu, Lei Zhang, Yanlong Wang, Weiwei Gu

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Severe localized serious cracks of 0Cr17Ni4Cu4Nb alloy turbine blades after years of service are analyzed by means of the macro-morphology, micro-morphology (SEM) and energy dispersion spectrum (EDS). The centrifugal stress and vibration characteristics of the blades are calculated and analyzed under the prestressed condition by finite element simulation. The results show that the failure of the blades is due to the stress corrosion mainly. The impeller blade system cannot avoid the region of “triple points” resonance during the actual operation, and torsional deformation occurs under this vibration stress. Stress concentration leads to the crack initiation and propagation, and fatigue cracks appear and then propagate. Corrosive elements of O, Na and S found on the surface of fracture will accelerate the corrosion.

Original language	English
Pages (from-to)	1509-1515
Number of pages	7
Journal	Journal of Failure Analysis and Prevention
Volume	19
Issue number	5
DOIs	https://doi.org/10.1007/s11668-019-00758-z
State	Published - 1 Oct 2019
Externally published	Yes

Keywords

0Cr17Ni4Cu4Nb alloy steel
Stress corrosion
Turbine blades
Vibration characteristics

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10.1007/s11668-019-00758-z

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@article{3f6845ff95d14e899a911eee66f5630b,

title = "Experimental and Simulated Analysis of Failure Mechanism of 0Cr17Ni4Cu4Nb Stainless Steel Blade",

abstract = "Severe localized serious cracks of 0Cr17Ni4Cu4Nb alloy turbine blades after years of service are analyzed by means of the macro-morphology, micro-morphology (SEM) and energy dispersion spectrum (EDS). The centrifugal stress and vibration characteristics of the blades are calculated and analyzed under the prestressed condition by finite element simulation. The results show that the failure of the blades is due to the stress corrosion mainly. The impeller blade system cannot avoid the region of “triple points” resonance during the actual operation, and torsional deformation occurs under this vibration stress. Stress concentration leads to the crack initiation and propagation, and fatigue cracks appear and then propagate. Corrosive elements of O, Na and S found on the surface of fracture will accelerate the corrosion.",

keywords = "0Cr17Ni4Cu4Nb alloy steel, Stress corrosion, Turbine blades, Vibration characteristics",

author = "Jie Xu and Lei Zhang and Yanlong Wang and Weiwei Gu",

note = "Publisher Copyright: {\textcopyright} 2019, ASM International.",

year = "2019",

month = oct,

day = "1",

doi = "10.1007/s11668-019-00758-z",

language = "英语",

volume = "19",

pages = "1509--1515",

journal = "Journal of Failure Analysis and Prevention",

issn = "1547-7029",

publisher = "Springer New York",

number = "5",

}

TY - JOUR

T1 - Experimental and Simulated Analysis of Failure Mechanism of 0Cr17Ni4Cu4Nb Stainless Steel Blade

AU - Xu, Jie

AU - Zhang, Lei

AU - Wang, Yanlong

AU - Gu, Weiwei

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Severe localized serious cracks of 0Cr17Ni4Cu4Nb alloy turbine blades after years of service are analyzed by means of the macro-morphology, micro-morphology (SEM) and energy dispersion spectrum (EDS). The centrifugal stress and vibration characteristics of the blades are calculated and analyzed under the prestressed condition by finite element simulation. The results show that the failure of the blades is due to the stress corrosion mainly. The impeller blade system cannot avoid the region of “triple points” resonance during the actual operation, and torsional deformation occurs under this vibration stress. Stress concentration leads to the crack initiation and propagation, and fatigue cracks appear and then propagate. Corrosive elements of O, Na and S found on the surface of fracture will accelerate the corrosion.

AB - Severe localized serious cracks of 0Cr17Ni4Cu4Nb alloy turbine blades after years of service are analyzed by means of the macro-morphology, micro-morphology (SEM) and energy dispersion spectrum (EDS). The centrifugal stress and vibration characteristics of the blades are calculated and analyzed under the prestressed condition by finite element simulation. The results show that the failure of the blades is due to the stress corrosion mainly. The impeller blade system cannot avoid the region of “triple points” resonance during the actual operation, and torsional deformation occurs under this vibration stress. Stress concentration leads to the crack initiation and propagation, and fatigue cracks appear and then propagate. Corrosive elements of O, Na and S found on the surface of fracture will accelerate the corrosion.

KW - 0Cr17Ni4Cu4Nb alloy steel

KW - Stress corrosion

KW - Turbine blades

KW - Vibration characteristics

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U2 - 10.1007/s11668-019-00758-z

DO - 10.1007/s11668-019-00758-z

M3 - 文章

AN - SCOPUS:85074155722

SN - 1547-7029

VL - 19

SP - 1509

EP - 1515

JO - Journal of Failure Analysis and Prevention

JF - Journal of Failure Analysis and Prevention

IS - 5

ER -

Experimental and Simulated Analysis of Failure Mechanism of 0Cr17Ni4Cu4Nb Stainless Steel Blade

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