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Thermal Fracture And Fatigue Of Anodized Aluminum Coatings For Space Applications
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Book Synopsis Thermal Fracture and Fatigue of Anodized Aluminum Coatings for Space Applications by : RS. Alwitt
Download or read book Thermal Fracture and Fatigue of Anodized Aluminum Coatings for Space Applications written by RS. Alwitt and published by . This book was released on 1994 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: A concern for the use of anodized aluminum as Space Station thermal control surfaces is the potential degradation of critical optical properties due to oxide coating cracking. This cracking may be induced by differential thermal expansion during hot adhesive bonding of the radiator assembly or during 30 years of exposure to sunlight/darkness cycles in low earth orbit (LEO). This paper summarizes investigations into the effects of temperature and humidity on coating stresses and cracking. Experimentally measured coating residual stresses after anodizing and sealing are shown to be strongly dependent on humidity. Two sets of tests are used to study cracking directly: one determines the temperature (Tc at which cracks first appear during a single heating cycle, while the other involves rapid thermal cycling (RTC) between maximum and minimum temperatures. The effects of several test parameters on cracking are reviewed, with special attention to temperature, coating thickness, and humidity. Fatigue models are developed to describe the observed cracking and to serve as the basis for predictions of LEO cracking. The physical characteristics of cracks and related substrate plastic deformation in both Tc and RTC tests are discussed briefly.
Book Synopsis Cyclic Deformation, Fracture, and Nondestructive Evaluation of Advanced Materials by : Michael R. Mitchell
Download or read book Cyclic Deformation, Fracture, and Nondestructive Evaluation of Advanced Materials written by Michael R. Mitchell and published by ASTM International. This book was released on 1994 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the initiation and growth of fatigue cracks and the fracture toughness of advanced materials such as silicon nitride, special alloys and steels, thermoplastics, and graphite-epoxy composites; and explains several non-destructive techniques to evaluate such materials for manufacturing defect
Book Synopsis Anodized Aluminum Coatings for Temperature Control of Space Vehicles by : James H. Weaver
Download or read book Anodized Aluminum Coatings for Temperature Control of Space Vehicles written by James H. Weaver and published by . This book was released on 1963 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preventing Cracking of Anodized Coatings by :
Download or read book Preventing Cracking of Anodized Coatings written by and published by . This book was released on 1995 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Selected Thermal Control Coatings for Long-life Space Structures by : Louis A. Teichman
Download or read book Evaluation of Selected Thermal Control Coatings for Long-life Space Structures written by Louis A. Teichman and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1995 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Anodic Oxidation of Aluminium and Its Alloys by : V F Henley
Download or read book Anodic Oxidation of Aluminium and Its Alloys written by V F Henley and published by Elsevier. This book was released on 2013-10-22 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anodic Oxidation of Aluminium and Its Alloys focuses on the basic principles of anodic oxidation, choice of materials, pretreatment, design, properties of the anodic film, testing, and maintenance. Organized into 16 chapters, this book begins with the principles of anodizing; applications of anodized aluminum; factors influencing the choice of grade of aluminum for anodizing; and factors influencing the choice of anodizing process. Subsequent chapters explain designing for anodizing; anodizing equipment; jigging (racking) methods for anodizing; chemical treatment processes before anodizing; and the anodizing process. The coloring, sealing, and stripping of the anodic coating; testing anodized aluminum; properties of anodized aluminum; maintenance of anodized aluminum; and effluent treatment for anodizing plants are also described. This text will be useful to students, technicians, product designers, architects, and engineers in the aluminum industry.
Book Synopsis Technology for Large Space Systems by :
Download or read book Technology for Large Space Systems written by and published by . This book was released on 1989 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Anodized aluminum coatings for termpature control of space vehicles by : James H. Weaver
Download or read book Anodized aluminum coatings for termpature control of space vehicles written by James H. Weaver and published by . This book was released on 1963 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722383060 Total Pages :54 pages Book Rating :4.3/5 (83 download)
Book Synopsis Evaluation of Thermal Control Coatings and Polymeric Materials Exposed to Ground Simulated Atomic Oxygen and Vacuum Ultraviolet Radiation by : National Aeronautics and Space Administration (NASA)
Download or read book Evaluation of Thermal Control Coatings and Polymeric Materials Exposed to Ground Simulated Atomic Oxygen and Vacuum Ultraviolet Radiation written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous thermal control and polymeric samples with potential International Space Station applications were evaluated for atomic oxygen and vacuum ultraviolet radiation effects in the Princeton Plasma Physics Laboratory 5 eV Neutral Atomic Oxygen Facility and in the MSFC Atomic Oxygen Drift Tube System. Included in this study were samples of various anodized aluminum samples, ceramic paints, polymeric materials, and beta cloth, a Teflon-impregnated fiberglass cloth. Aluminum anodizations tested were black duranodic, chromic acid anodize, and sulfuric acid anodize. Paint samples consisted of an inorganic glassy black paint and Z-93 white paint made with the original PS7 binder and the new K2130 binder. Polymeric samples evaluated included bulk Halar, bulk PEEK, and silverized FEP Teflon. Aluminized and nonaluminized Chemfab 250 beta cloth were also exposed. Samples were evaluated for changes in mass, thickness, solar absorptance, and infrared emittance. In addition to material effects, an investigation was made comparing diffuse reflectance/solar absorptance measurements made using a Beckman DK2 spectroreflectometer and like measurements made using an AZ Technology-developed laboratory portable spectroreflectometer. Kamenetzky, R. R. and Vaughn, J. A. and Finckenor, M. M. and Linton, R. C. Marshall Space Flight Center...
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721006205 Total Pages :28 pages Book Rating :4.0/5 (62 download)
Book Synopsis Strength, Fracture Toughness, Fatigue, and Standardization Issues of Free-Standing Thermal Barrier Coatings by : National Aeronautics and Space Administration (NASA)
Download or read book Strength, Fracture Toughness, Fatigue, and Standardization Issues of Free-Standing Thermal Barrier Coatings written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-11 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strength, fracture toughness and fatigue behavior of free-standing thick thermal barrier coatings of plasma-sprayed ZrO2-8wt % Y2O3 were determined at ambient and elevated temperatures in an attempt to establish a database for design. Strength, in conjunction with deformation (stress-strain behavior), was evaluated in tension (uniaxial and trans-thickness), compression, and uniaxial and biaxial flexure; fracture toughness was determined in various load conditions including mode I, mode II, and mixed modes I and II; fatigue or slow crack growth behavior was estimated in cyclic tension and dynamic flexure loading. Effect of sintering was quantified through approaches using strength, fracture toughness, and modulus (constitutive relations) measurements. Standardization issues on test methodology also was presented with a special regard to material's unique constitutive relations.Choi, Sung R. and Zhu, Dong-Ming and Miller, Robert A.Glenn Research CenterTHERMAL CONTROL COATINGS; FRACTURE STRENGTH; FATIGUE (MATERIALS); DEFORMATION; SINTERING; ZIRCONIUM OXIDES; STRESS-STRAIN RELATIONSHIPS
Book Synopsis The Metallurgy of Anodizing Aluminum by : Jude Mary Runge
Download or read book The Metallurgy of Anodizing Aluminum written by Jude Mary Runge and published by Springer. This book was released on 2018-02-01 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the history of the concepts critical to the discovery and development of aluminum, its alloys and the anodizing process are reviewed to provide a foundation for the challenges, achievements, and understanding of the complex relationship between the aluminum alloy and the reactions that occur during anodic oxidation. Empirical knowledge that has long sustained industrial anodizing is clarified by viewing the process as corrosion science, addressing each element of the anodizing circuit in terms of the Tafel Equation. This innovative approach enables a new level of understanding and engineering control for the mechanisms that occur as the oxide nucleates and grows, developing its characteristic highly ordered structure, which impact the practical function of the anodic aluminum oxide.
Author :United States. National Aeronautics and Space Administration. Scientific and Technical Information Division Publisher : ISBN 13 : Total Pages :192 pages Book Rating :4.:/5 (317 download)
Book Synopsis Technology for Large Space Systems: A Bibliography with Indexes (supplement 20) by : United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Download or read book Technology for Large Space Systems: A Bibliography with Indexes (supplement 20) written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Division and published by . This book was released on 1989 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Coating Cracking and Fatigue Strength of 7050-T74 Aluminum Alloy with Different Anodize Coating Thicknesses by : John M. Goetz
Download or read book Investigation of Coating Cracking and Fatigue Strength of 7050-T74 Aluminum Alloy with Different Anodize Coating Thicknesses written by John M. Goetz and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The benefits of applying anodize coatings to aluminum alloys for corrosion protection have been widely recognized. Despite their many advantages, anodize coatings are believed to be a detriment to the fatigue properties of the substrate aluminum. Additionally, there is relatively little scientific knowledge of how to optimize such coatings, and the impact of varying coating thickness is not understood. This project involves the study of four anodize thicknesses ranges deposited on a 7050-T74 aluminum substrates. Through the use of rotary bend fatigue experiments and tensile cracking experiments, the effect of increasing anodize thickness has been examined. Scanning electron microscopy has also been used to relate the measured strengths to the cracking patterns observed at the failure surfaces. Through the fatigue experiments, it was found that the thinnest anodize coatings yielded the highest fatigue lives. The tensile cracking experiments with acoustic emission measurements indicate that when compared to the thinner coatings, the thickest coatings have a higher cohesive strength. This research project has provided much needed insight into the field of anodic coatings for structural applications. More importantly, the results of this project quantify the extent to which the mechanical and coating properties of anodized 7050 aluminum alloy are affected by varying coating thickness. The information gained through this research project is aimed at helping Goodrich make an educated decision on the optimum thickness for the anodize coating of the 7050 aluminum alloy.
Download or read book Plating and Surface Finishing written by and published by . This book was released on 1993 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
