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The Fracture Morphology Of Nickel Base Superalloys Tested In Fatigue And Creep Fatigue At 650 C
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723396540 Total Pages :26 pages Book Rating :4.3/5 (965 download)
Book Synopsis The Fracture Morphology of Nickel-Base Superalloys Tested in Fatigue and Creep-Fatigue at 650 C by : National Aeronautics and Space Administration (NASA)
Download or read book The Fracture Morphology of Nickel-Base Superalloys Tested in Fatigue and Creep-Fatigue at 650 C written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-20 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fracture surfaces of compact tension specimens from seven nickel-base superalloys fatigue tested at 650 C were studied by scanning electron microscopy and optical metallography to determine the nature and morphology of the crack surface in the region of stable growth. Crack propagation testing was performed as part of an earlier study at 650 C in air using a 0.33 Hz fatigue cycle and a creep-fatigue cycle incorporating a 900 second dwell at maximum load. In fatigue, alloys with a grain size greater than 20 micrometers, HIP Astroloy, Waspaloy, and MERL 76, exhibited transgranular fracture. MERL 76 also displayed numerous fracture sites which were associated with boundaries of prior powder particles. The two high strength, fine grain alloys, IN 100 and NASA IIB-7, exhibited intergranular fracture. Rene 95 and HIP plus forged Astroloy displayed a mixed failure mode that was transgranular in the coarse grains and intergranular in the fine grains. Under creep-fatigue conditions, fracture was found to be predominantly intergranular in all seven alloys. Gayda, J. and Miner, R. V. Glenn Research Center NASA-TM-81740, E-793
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Download or read book Superalloys 2012 written by Eric S. Huron and published by John Wiley & Sons. This book was released on 2012-10-02 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt: A superalloy, or high-performance alloy, is an alloy that exhibits excellent mechanical strength at high temperatures. Superalloy development has been driven primarily by the aerospace and power industries. This compilation of papers from the Twelfth International Symposium on Superalloys, held from September 9-13, 2012, offers the most recent technical information on this class of materials.
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Book Synopsis High Temperature Alloys for Gas Turbines 1982 by : R. Brunetaud
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Book Synopsis Embrittlement of Engineering Alloys by : C. L. Briant
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Book Synopsis 8th Congress on Material Testing, Budapest, 28 September - 1 October, 1982 by :
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Book Synopsis Residual Stress Effects on Fatigue and Fracture Testing and Incorporation of Results Into Design by : Michael R. Mitchell
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Book Synopsis Deformation and Evolution of Life in Crystalline Materials by : Xijia Wu
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