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: J. J. Mecholsky
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 416
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Book Description
Author: Bernard M. Strauss
Publisher: ASTM International
ISBN: 9780803103597
Category : Technology & Engineering
Languages : en
Pages : 402
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Book Description
Author: Khlefa Alarbe Esaklul
Publisher: ASM International
ISBN: 9780871704955
Category : Technology & Engineering
Languages : en
Pages : 608
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Book Description
Presents more than 120 expert failure analysis case histories from industries including automotive, aerospace, utilities, oil and gas, petrochemical, biomedical, ground transportation, off-highway vehicles, and more. Volume 2 builds on the tremendous acceptance of Volume 1 by the failure analysis community. The two volumes can also be purchased as a set for a special discounted price. Learn how others have investigated and solved failures in various industries involving a wide range of failure modes, materials, and analysis techniques.
Author: VP. Swaminathan
Publisher:
ISBN:
Category : Ceramic materials
Languages : en
Pages : 18
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Book Description
An extension shaft is connected to the governor end of a high-pressure steam turbine. This shaft, which drives the primary oil pump impeller in a tubine-generator unit, fractured while in service. Metallurgical analysis included extensive fractographic study using optical, scanning, and transmission electron microscopes. Fatigue striations and beach marks were observed on the fracture surface. Striation spacing measurements were made on carbon replicas taken at various crack depths. The approximate magnitude of the cyclic stresses causing these striations was calculated from data available from scale-model test specimens. Peeling-type cracks initiating from the bottom of the keyway indicative of torsional oscillations were also found. The fracture initiated at the keyway fillet and propagated in high-cycle fatigue mode under combined torsional and bending loads.
Author: Jorge Luis González-Velázquez
Publisher: Springer
ISBN: 3319766511
Category : Science
Languages : en
Pages : 172
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Book Description
This book presents fractography and failure analysis at a level that is accessible for non-expert readers, without losing scientific rigor. It offers a comprehensive description of fracture surfaces in engineering materials, with an emphasis on metals, and of the methodology for the observation of fracture surfaces. It also discusses in detail the main fracture mechanisms and their corresponding fracture surfaces, including brittle, ductile, fatigue, and environmental fractures. The last chapter is dedicated to the use of fractography in determining of the causes component failure. In modern engineering, the analysis of fractured components is a common practice in many fields, such as integrity management systems, materials science research, and failure investigations. As such this book is useful for engineers, scientists, engineering students, loss adjuster surveyors and any professional dealing with fractured components.
Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 924
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Book Description
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 400
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Book Description
Author: B. M. Strauss
Publisher:
ISBN:
Category : Fractography
Languages : en
Pages : 390
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Book Description
Author: N. G. Allen
Publisher: Wiley-Blackwell
ISBN:
Category : House & Home
Languages : en
Pages : 752
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Book Description
Jet cutting techniques have been successfully applied for many years, and are no longer a new technology. However, with the range of applications expanding, there are a number of important issues emerging, which are addressed in this volume. The contents of Jet Cutting Technology cover the traditional aspects of both water and fluid jets, including fluid mechanics, cutting and drilling, abrasive jets, pulse jets, jet maniuplation, jet/target interaction, nozzle systems, pumps and intensifiers, surface treatment, and cleaning. These techniques have a wide application in a number of different areas, including aerospace, civil engineering, manufacturing, mining, and medicine, amongst others. However, of equal importance are thenew issues which are now coming to the fore, including application opportunities, user requirements, Codes of Practice, legislation, safety, and many others. Jet Cutting Technology can be wholeheartedly recommended to engineers with any interest in, or requirement for, this important and established technology.
