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Elevated Temperature Fatigue Behavior Of Tungsten Fiber Reinforced Superalloy Composites
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Book Synopsis Elevated Temperature Fatigue Behavior of Tungsten Fiber Reinforced Superalloy Composites by : JL. Yuen
Download or read book Elevated Temperature Fatigue Behavior of Tungsten Fiber Reinforced Superalloy Composites written by JL. Yuen and published by . This book was released on 1994 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The low-and high-cycle fatigue behavior of three different fiber-reinforced superalloy (FRS) composite materials were evaluated. Each composite material contained 40 vol% unidirectionally aligned continuous length tungsten-1.5 wt% ThO2 fibers. The metal matrices were Waspaloy, Type 316L stainless steel, and Incology 907. Fatigue tests were conducted at 871°C in a helium atmosphere under load control with a load ratio (minimum stress/maximum stress) of 0.2. The composites were found to have excellent elevated temperature fatigue strength. The fibers played a major role in controlling the fatigue strength of the composites. Fatigue crack fronts were found to be retarded by the fibers. The cracks tended to branch at the fiber/matrix interface and grew by a sliding mode along the interface. Matrix surface cracks induced by thermal shock damage had little influence on the fatigue strength of the FRS composites.
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781792754432 Total Pages :36 pages Book Rating :4.7/5 (544 download)
Book Synopsis High Temperature Fatigue Behavior of Tungsten Copper Composites by : National Aeronautics and Space Adm Nasa
Download or read book High Temperature Fatigue Behavior of Tungsten Copper Composites written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The high temperature fatigue behavior of a 9 vol percent, tungsten fiber reinforced copper matrix composite was investigated. Load-controlled isothermal fatigue experiments at 260 and 560 C and thermomechanical fatigue (TMF) experiments, both in phase and out of phase between 260 and 560 C, were performed. The stress-strain response displayed considerable inelasticity under all conditions. Also, strain ratcheting was observed during all the fatigue experiments. For the isothermal fatigue and in-phase TMF tests, the ratcheting was always in a tensile direction, continuing until failure. The ratcheting during the out-of-phase TMF test shifted from a tensile direction to a compressive direction. This behavior was thought to be associated with the observed bulging and the extensive cracking of the out-of-phase specimen. For all cases, the fatigue lives were found to be controlled by damage to the copper matrix. Grain boundary cavitation was the dominant damage mechanism of the matrix. On a stress basis, TMF loading reduced lives substantially, relative to isothermal cycling. In-phase cycling resulted in the shortest lives, and isothermal fatigue at 260 C, the longest. Verrilli, Michael J. and Kim, Yong-Suk and Gabb, Timothy P. Glenn Research Center NASA-TM-102404, E-5156, NAS 1.15:102404 RTOP 510-01-0A...
Book Synopsis High Temperature Fatigue Behavior of Tungsten Copper Composites by : Michael J. Verrilli
Download or read book High Temperature Fatigue Behavior of Tungsten Copper Composites written by Michael J. Verrilli and published by . This book was released on 1990 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-Temperature Tension-Compression Fatigue Behavior of a Unidirectional Tungsten Copper Composite by : MJ. Verrilli
Download or read book High-Temperature Tension-Compression Fatigue Behavior of a Unidirectional Tungsten Copper Composite written by MJ. Verrilli and published by . This book was released on 1993 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The high-temperature fatigue behavior of a [0]12 tungsten fiber-reinforced copper matrix composite was investigated. Specimens having fiber volume percentages of 10 and 36 were fatigued under fully reversed, strain-controlled conditions at both 260 and 560°C. The fatigue life was found to be independent of fiber volume fraction because fatigue damage preferentially occurred in the matrix. Also, the composite fatigue lives were shorter at 560°C as compared to 260°C, due to changes in mode of matrix failure. On a total strain basis, the fatigue life of the composite at 560°C was the same as the life of unreinforced copper, indicating that the presence of the fibers did not degrade the fatigue resistance of the copper matrix in this composite system. Comparison of strain-controlled fatigue data to previously generated load-controlled data revealed that the strain-controlled fatigue lives were longer because of mean strain and mean stress effects.
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1994 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Preliminary Characterization of the Tensile and Fatigue Behavior of Tungsten-fiber/Waspaloy-matrix Composite by :
Download or read book A Preliminary Characterization of the Tensile and Fatigue Behavior of Tungsten-fiber/Waspaloy-matrix Composite written by and published by . This book was released on 1992 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Temperature Tension-compression Fatigue Behavior of a Tungsten Copper Composite by : Michael J. Verrilli
Download or read book High Temperature Tension-compression Fatigue Behavior of a Tungsten Copper Composite written by Michael J. Verrilli and published by . This book was released on 1991 with total page 0 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 1991 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermomechanical Fatigue Behavior of Materials by : Michael A. McGaw
Download or read book Thermomechanical Fatigue Behavior of Materials written by Michael A. McGaw and published by ASTM International. This book was released on 2003 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: "ASTM Stock Number: STP1428. - "Fourth Symposium on Thermomechanical Fatigue Behavior of Materials, held in Dallas, Texas on November 7-8, 2001. The Symposium was sponsored by ASTM Committee E08 on Fatigue and Fracture and its Subcommittee E08.05 on Cyclic Deformation and Fat. - Includes bibliographical references and indexes. ASTM International; 2011.
Book Synopsis Elevated-temperature Tensile Properties of Alloyed Tungsten Fiber Composites by : Donald W. Petrasek
Download or read book Elevated-temperature Tensile Properties of Alloyed Tungsten Fiber Composites written by Donald W. Petrasek and published by . This book was released on 1965 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of selected alloying elements on the elevated temperature tensile properties of tungsten fiber reinforced composites were studied. Composites were made of copper, copper- 2 percent chromium and copper- 10 percent nickel reinforced with various volume percents of uniaxially oriented tungsten fibers. The composites were tested in tension at temperatures up to 1800 degrees F.A comparison of the elevated-temperature tensile properties of tungsten fiber - copper alloy composites, representing soluble systems, was made with tungsten fiber - copper composites, representing a mutually insoluble system. The effects of alloying on the elevated-temperature tensile properties of tungsten fiber reinforced composites was also studied. A linear relation existed at elevated temperatures between tensile strength and volume percent fiber content for all the systems investigated. The copper alloy composites were weaker in tension at high volume percent fiber contents than copper composites in which alloying with the fiber did not occur. The tensile strength of the alloyed tungsten fiber decreased with increasing penetration of the alloying element into the tungsten fiber.
Download or read book Engine Structures written by and published by . This book was released on 1988 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superalloys, Supercomposites and Superceramics by : John K Tien
Download or read book Superalloys, Supercomposites and Superceramics written by John K Tien and published by Elsevier. This book was released on 2012-12-02 with total page 789 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superalloys, Supercomposites and Superceramics reviews the state of superalloy technology and some of the more salient aspects of alternative high temperature systems such as superceramics and supercomposites. Superalloy topics range from resource availability to advanced processing such as VIM, VAR, and VADAR, along with investment casting and single crystal growth, new superplastic forming techniques and powder metallurgy, structure property relationships, strengthening mechanisms, oxidation, hydrogen embrittlement, and phase predictions. This book is comprised of 22 chapters that explore key issues of high temperature materials in a synergistic manner. The first chapter reflects on the growth of the superalloy industry and its technology over the past 40 years. The discussion then turns to some of the trends in superalloy development, focusing on what is understood to be meant by the term strategic materials and the current status of resources and reserves in the United States. Particular attention is given to the supply sources and availability of strategic materials. The results achieved from the research program undertaken by NASA Lewis Research Center named Conservation Of Strategic Aerospace Materials (COSAM) are also presented. The chapters that follow explore alternative high temperature systems such as intermetallics, fiber reinforced superalloys, and the processing and high temperature properties of ceramics and carbon-carbon composites. This book will be a valuable resource for professionals and graduate students interested in learning about superalloys, supercomposites, and superceramics.
Book Synopsis Stress-strain Behavior of Tungsten-fiber-reinforced Copper Composites by : David L. McDanels
Download or read book Stress-strain Behavior of Tungsten-fiber-reinforced Copper Composites written by David L. McDanels and published by . This book was released on 1963 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue at Elevated Temperatures by :
Download or read book Fatigue at Elevated Temperatures written by and published by ASTM International. This book was released on 1973 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Overview of Elevated Temperature Damage Mechanisms and Fatigue Behavior of a Unidirectional SCS-6/Ti-15-3 Composite by : Michael G. Castelli
Download or read book An Overview of Elevated Temperature Damage Mechanisms and Fatigue Behavior of a Unidirectional SCS-6/Ti-15-3 Composite written by Michael G. Castelli and published by . This book was released on 1993 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 1995 with total page 920 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 1989 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
