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High Temperature Fatigue Behavior Of Tungsten Copper Composites
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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 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 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.
Book Synopsis Thermomechanical Fatigue Behavior of Materials by : Huseyin Sehitoglu
Download or read book Thermomechanical Fatigue Behavior of Materials written by Huseyin Sehitoglu and published by ASTM International. This book was released on 1993 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Composite Materials by : Eugene T. Camponeschi
Download or read book Composite Materials written by Eugene T. Camponeschi and published by ASTM International. This book was released on 1993 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bibliography of Lewis Research Center Technical Publications Announced in 1991 by :
Download or read book Bibliography of Lewis Research Center Technical Publications Announced in 1991 written by and published by . This book was released on 1992 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Fatigue Behavior of Copper and Selected Copper Alloys for High Heat Flux Applications by :
Download or read book Fatigue Behavior of Copper and Selected Copper Alloys for High Heat Flux Applications written by and published by . This book was released on 1996 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: The room temperature fatigue behavior of standard and subsize specimens was examined for five copper alloys: OFHC Cu, two CuNiBe alloys, a CuCrZr alloy, and a Cu-Al2O3 alloy. Fatigue tests were run in strain control to failure. In addition to establishing failure lives, the stress amplitudes were monitored as a function of numbers of accrued cycles. The results indicate that the alloys with high initial yield strengths provide the best fatigue response over the range of failure lives examined in the present study: N{sub f} = 103 to 106. In fact, the fatigue performance of the best alloys is dominated by the elastic portion of the strain range, as would be expected from the correlation of performance with yield properties. The alumina strengthened alloy and the two CuNiBe alloys show the best overall performance of the group examined here.
Book Synopsis Improved Techniques for Thermomechanical Testing in Support of Deformation Modeling by : Michael G. Castelli
Download or read book Improved Techniques for Thermomechanical Testing in Support of Deformation Modeling written by Michael G. Castelli and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1994 with total page 1584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1993 with total page 1194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by : United States. Superintendent of Documents
Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1993 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
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:
