The Effect Of O2 H2o And N2 On The Fatigue Crack Growth Behavior Of An Alpha Beta Titanium Alloy At 24 C And 177 C
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The Effect Of O2 H2o And N2 On The Fatigue Crack Growth Behavior Of An Alpha Beta Titanium Alloy At 24 C And 177 C
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2018-09-17
The Effect Of O2 H2o And N2 On The Fatigue Crack Growth Behavior Of An Alpha Beta Titanium Alloy At 24 C And 177 C written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-17 with Science categories.
To study the effects of atmospheric species on the fatigue crack growth behavior of an a+B titanium alloy (Ti 6-2-2-2-2) at room temperature and 177 C, fatigue tests were performed in laboratory air, ultrahigh vacuum, and high purity water vapor, oxygen, nitrogen and helium at various partial pressures. Accelerated fatigue crack growth rates in laboratory air compared to ultrahigh vacuum are linked to the damaging effects of both water vapor and oxygen. Observations of the fatigue crack growth behavior in ultrahigh purity environments, along with surface film analysis using X-ray photoelectron spectroscopy (XPS), suggest that multiple crack-tip processes govern the damaging effects of air. Three possible mechanisms are proposed: 1) at low pressure (less than 10(exp -1) Pa), accelerated da/dN is likely due to monolayer adsorption on crack-tip surfaces presumably resulting in decreased bond strengths at the fatigue crack tip, 2) for pressures greater than 10(exp -1) Pa, accelerated da/dN in oxygen may result from oxidation at the crack tip limiting reversible slip, and 3) in water vapor, absorption of atomic hydrogen at the reactive crack tip resulting in process zone embrittlement.Smith, Stephen W. and Piascik, Robert S.Langley Research CenterFATIGUE TESTS; FATIGUE (MATERIALS); CRACK PROPAGATION; TITANIUM ALLOYS; EMBRITTLEMENT; ATMOSPHERIC COMPOSITION; X RAY SPECTROSCOPY; WATER VAPOR; ULTRAHIGH VACUUM; PHOTOELECTRON SPECTROSCOPY
The Effect Of O2 H2o And N2 On The Fatigue Crack Growth Behavior Of An Alpha Beta Titanium Alloy At 24 C And 177 C
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Author : Stephen W. Smith
language : en
Publisher:
Release Date : 2001
The Effect Of O2 H2o And N2 On The Fatigue Crack Growth Behavior Of An Alpha Beta Titanium Alloy At 24 C And 177 C written by Stephen W. Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Chemical Abstracts
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Author :
language : en
Publisher:
Release Date : 2002
Chemical Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Chemistry categories.
Threshold Fatigue Crack Growth Behavior
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Author : F. K. Haake
language : en
Publisher:
Release Date : 1989
Threshold Fatigue Crack Growth Behavior written by F. K. Haake and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Gas-turbines categories.
Titanium
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Author : Matthew J. Donachie
language : en
Publisher: ASM International
Release Date : 2000
Titanium written by Matthew J. Donachie and has been published by ASM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Technology & Engineering categories.
Designed to support the need of engineering, management, and other professionals for information on titanium by providing an overview of the major topics, this book provides a concise summary of the most useful information required to understand titanium and its alloys. The author provides a review of the significant features of the metallurgy and application of titanium and its alloys. All technical aspects of the use of titanium are covered, with sufficient metals property data for most users. Because of its unique density, corrosion resistance, and relative strength advantages over competing materials such as aluminum, steels, and superalloys, titanium has found a niche in many industries. Much of this use has occurred through military research, and subsequent applications in aircraft, of gas turbine engines, although more recent use features replacement joints, golf clubs, and bicycles.Contents include: A primer on titanium and its alloys, Introduction to selection of titanium alloys, Understanding titanium's metallurgy and mill products, Forging and forming, Castings, Powder metallurgy, Heat treating, Joining technology and practice, Machining, Cleaning and finishing, Structure/processing/property relationships, Corrosion resistance, Advanced alloys and future directions, Appendices: Summary table of titanium alloys, Titanium alloy datasheets, Cross-reference to titanium alloys, Listing of selected specification and standardization organizations, Selected manufacturers, suppliers, services, Corrosion data, Machining data.
Aerospace Materials And Applications
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Author : Biliyar N. Bhat
language : en
Publisher:
Release Date : 2018
Aerospace Materials And Applications written by Biliyar N. Bhat and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Aeronautics categories.
"The present volume is focused on documenting the novel processing, fabrication, characterization, and testing approaches that are unique to aerospace materials/structures/systems"--Preface.
Atlas Of Stress Corrosion And Corrosion Fatigue Curves
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Author : A. J. McEvily
language : en
Publisher: ASM International(OH)
Release Date : 1990
Atlas Of Stress Corrosion And Corrosion Fatigue Curves written by A. J. McEvily and has been published by ASM International(OH) this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Science categories.
A reference for materials scientists that can be used to find the effects of various corrosive media and processing variables on the stress-corrosion cracking and corrosion fatigue characteristics of ferrous and nonferrous alloys. There are more than 500 stress/cracking-time curves, S/N curves, and
Nondestructive Materials Characterization
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Author : Norbert G. H. Meyendorf
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-21
Nondestructive Materials Characterization written by Norbert G. H. Meyendorf and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-21 with Science categories.
With an emphasis on aircraft materials, this book describes techniques for the material characterization to detect and quantify degradation processes such as corrosion and fatigue. It introduces readers to these techniques based on x-ray, ultrasonic, optical and thermal principles and demonstrates the potential of the techniques for a wide variety of applications concerning aircraft materials, especially aluminum and titanium alloys. The advantages and disadvantages of various techniques are evaluated.
Materials And Processes
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Author : Barrie D. Dunn
language : en
Publisher: Springer
Release Date : 2015-12-29
Materials And Processes written by Barrie D. Dunn and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-12-29 with Technology & Engineering categories.
The objective of this book is to assist scientists and engineers select the ideal material or manufacturing process for particular applications; these could cover a wide range of fields, from light-weight structures to electronic hardware. The book will help in problem solving as it also presents more than 100 case studies and failure investigations from the space sector that can, by analogy, be applied to other industries. Difficult-to-find material data is included for reference. The sciences of metallic (primarily) and organic materials presented throughout the book demonstrate how they can be applied as an integral part of spacecraft product assurance schemes, which involve quality, material and processes evaluations, and the selection of mechanical and component parts. In this successor edition, which has been revised and updated, engineering problems associated with critical spacecraft hardware and the space environment are highlighted by over 500 illustrations including micrographs and fractographs. Space hardware captured by astronauts and returned to Earth from long durations in space are examined. Information detailed in the Handbook is applicable to general terrestrial applications including consumer electronics as well as high reliability systems associated with aeronautics, medical equipment and ground transportation. This Handbook is also directed to those involved in maximizing the relia bility of new materials and processes for space technology and space engineering. It will be invaluable to engineers concerned with the construction of advanced structures or mechanical and electronic sub-systems.
Gas Transport In Porous Media
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Author : Edward Allen Mason
language : en
Publisher:
Release Date : 1983
Gas Transport In Porous Media written by Edward Allen Mason and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Gas dynamics categories.
This monograph gives an historical account of the development of the dusty-gas model for the description of gas transport in porous media, and describes the model and its applications in sufficient detail that it can be employed in engineering practice.