Stress Corrosion Cracking of LP Turbine Rotor Discs PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
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Book Description
Until 1987 is was considered that stress corrosion cracking in low pressure disc keyways and bores would only affect non-reheat machines where discs are continuously wet on load, however it has been found that stress corrosion cracking and corrosion fatigue have caused problems in low pressure turbine disc keyways of fossil fired turbine generator units of the reheat type. Historical experience, assessment of safe operating life, crack growth, critical crack size, safe operating disc life, survival calculations, and refurbishment operations to improve rotor security are discussed.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
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Book Description
Until 1987 is was considered that stress corrosion cracking in low pressure disc keyways and bores would only affect non-reheat machines where discs are continuously wet on load, however it has been found that stress corrosion cracking and corrosion fatigue have caused problems in low pressure turbine disc keyways of fossil fired turbine generator units of the reheat type. Historical experience, assessment of safe operating life, crack growth, critical crack size, safe operating disc life, survival calculations, and refurbishment operations to improve rotor security are discussed.
Author: R. D. Caligiuri
Publisher:
ISBN:
Category : Steam-turbine disks
Languages : en
Pages : 80
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Book Description
Author: Samuel Kwabena Somuah
Publisher:
ISBN:
Category : Steam-turbines
Languages : en
Pages : 388
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Book Description
Author: Claire L. Verona
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: HC. Burghard
Publisher:
ISBN:
Category : Ceramic materials
Languages : en
Pages : 22
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Book Description
A metallurgical evaluation of a failed steam turbine disk was performed. The disk in question had failed in service and was one of eleven shrunk-on disks comprising the LP turbine rotor of an electric generating unit. The investigation included detailed fractographic examinations of the initiation area of the primary fracture and metallographic and fractographic examination of subcritical defects. A critical magnetic particle inspection of all blade grooves was performed, and mechanical properties tests and chemical analyses were conducted to characterize the disk material. Slow-strain-rate tests were also performed to investigate the cracking susceptibility of the disk material in selected environments. The observations made and the data obtained indicate that subcritical crack growth occurred in certain blade attachment grooves by some form of stress corrosion cracking. On the basis of the results of this investigation, the failure of the disk is attributed to the combined effects of high operating stresses at the blade grooves, low fracture toughness of the disk material, and environment.
Author: F. P. Ford
Publisher:
ISBN:
Category :
Languages : en
Pages : 37
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Book Description
Author: Shengqi Zhou
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 32
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Book Description
Author: E. Bachelet
Publisher: Springer Science & Business Media
ISBN: 9780792309253
Category : Technology & Engineering
Languages : en
Pages : 912
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Book Description
Themes reflect the work carried out within the framework of COST-501 and of COST-505 the latter being concerned with materials for steam turbines and the first results of the concerted action COST-501/II 'High temperature materials for power engineering' initiated in 1988.
Author: Markus O. Speidel
Publisher: Springer
ISBN:
Category : Juvenile Nonfiction
Languages : en
Pages : 584
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Book Description
Author: J. T. Adrian Roberts
Publisher: Springer Science & Business Media
ISBN: 1468471945
Category : Technology & Engineering
Languages : en
Pages : 493
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Book Description
In recent years the effort devoted to assuring both the safety and reliability of commercial nuclear fission power reactors has markedly increased. The incentives for performing this work are large since the resulting im provement in plant productivity translates into lower fuel costs and, more importantly, reduced reliance on imported oil. Reliability and availability of nuclear power plants, whether fission or fusion, demand that more attention be focused on the behavior of materials. Recent experiences with fission power indicate that the basic properties of materials, which categorize their reliable behavior under specified conditions, need reinforcement to assure trouble-free operation for the expected service life. The pursuit of additional information con tinues to demand a better understanding of some of the observed anom alous behavior, and of the margin of resistance of materials to unpre dictable service conditions. It is also apparent that, next to plasma heating and confinement, materials selection represents the most serious chal lenge to the introduction of fusion power. The recognition of the importance of materials performance to nu clear plant performance has sustained a multimillion dollar worldwide research and development effort that has yielded significant results, both in quantification of the performance limits of materials in current use and the development and qualification of new materials. Most of this infor mation appears in the open literature in the form of research reports, journal articles, and conference proceedings.
