The Effects of Thermal Exposure on Graphite/aluminum Composites PDF Download
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Author: Martha E. Meaney
Publisher:
ISBN:
Category : Metallic composites
Languages : en
Pages : 108
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Book Description
Author: Martha E. Meaney
Publisher:
ISBN:
Category : Metallic composites
Languages : en
Pages : 108
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 70
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Author: William C Harrigan (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
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Room temperature tensile tests were conducted on specimens of 6061 aluminum-Thornel 50 graphite composite after thermal exposure for up to 3000 hours at 465C and thermal cycling between room temperature and 485C or 400C for up to 5000 cycles. These tests demonstrate that the ultimate strength of the composite is not affected by thermal exposure at 465C for 3000 hours or by thermal cycling between room temperature and 400C for 5000 cycles. The tensile modulus is also unaffected by exposure at 465C or cycling to 400C. Cycling between room temperature and 485C for 5000 cycles causes a 9% decrease in the strength with no decrease in modulus. (Author).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 40
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Author: George C. Olsen
Publisher:
ISBN:
Category : Aluminum
Languages : en
Pages : 40
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Author: Gregory A. Dries
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 36
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Author: Jean Anne Hodson
Publisher:
ISBN:
Category :
Languages : en
Pages : 146
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 602
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781725080829
Category :
Languages : en
Pages : 36
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An experimental investigation of the mechanical properties and microstructure of an aluminum matrix/polycrystalline alumina fiber composite material is discussed. The effects of fabrication, isothermal exposure (up to 10,000 hours at 590 K), thermal cycling (6000 cycles between 200 K and 590 K), fatigue (1,000,000 tension-tension cycles) were determined by mechanical testing and metallurgical analysis. The fabrication process severely degraded the fiber strength by reducing the alumina to a nonstoichiometric form and quenching in the resultant vacancies and stress fields. However, isothermal exposure, thermal cycling, and fatigue cycling all restored the fiber strength by enhancing vacancy annihilation. Comparison of the as-fabricated material with other aerospace materials shows that it is an attractive candidate for select applications. Long duration isothermal exposure weakened the matrix by overaging and through the diffusional loss of lithium to a surface reaction forming lithium carbonate. Thermal cycling initiated cracks in the matrix and fibers. Tension-tension fatigue cycling caused no apparent damage to the as-fabricated material but in fact, strengthened it to the rule-of-mixtures value. Fatigue cycling after thermal exposure did have a cumulative damage effect. Olsen, G. C. Langley Research Center NASA-TP-1795, L-14074 RTOP 506-53-23-01...
Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 854
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