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A statistical study of the jumpwise plastic deformation of aluminum at low temperatures

作者:科技文献资料网 时间:2018-10-19 21:39:56  浏览:8550   来源:科技文献资料网
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[唯一标识符]:CDSITC.AEROSPACE.A80-48596
[文献来源]:美国航空航天数据库(aerospace);国际航宇文摘(IAA)
[资源原始索取号]:A80-48596
[标题]:A statistical study of the jumpwise plastic deformation of aluminum at low temperatures
[出版时间]:198008
[出版年份]:1980
[馆藏索取号]:A80-48596


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[唯一标识符]:CDSITC.AEROSPACE.N87-22838
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:N1987-22838; Reference AN: N87-22838
[标题]:Experimental and theoretical studies of the structure of grain boundaries (Progress Report)
[作者]:ASHCROFT N W; SASS S L
[文摘]:The long range goal of this research project has been to obtain information on the atomic structure of grain boundaries in bcc metals and ceramics, to understand how segregation influences grain boundary structure and causes boundaries to become embrittled in Fe-base alloys, to understand how segregation and ionization state of the solute influences the boundary structure in ceramic materials, and to understand the role of boron and nonstoichiometry in making brittle boundaries in Ni3Al become ductile. A theoretical program was initiated during the period of this grant with the goal of understanding and improving the interatomic potentials that are used to calculate the structure of grain boundaries in metallic systems. (DOE)
[关键词]:BRITTLENESS ; CERAMICS ; DUCTILITY ; GRAIN BOUNDARIES; STRUCTURAL ANALYSIS; ALUMINUM ALLOYS; BORON ; IRON ALLOYS; MAGNESIUM OXIDES; NICKEL ALLOYS
[出版年份]:1987
[专业领域]:METALLIC MATERIALS
[唯一标识符]:CDSITC.AEROSPACE.A91-50637
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:A1991-50637; Reference AN: A91-50637
[标题]:Factors associated with leukocyturia in asymptomatic pilots
[作者]:FROOM PAUL; SHOCHAT IGAL; BENBASSAT JOCHANAN
[来源]:Aviation Space and Environmental Medicine. vol. 62, Sept. 1991, p. 890 892.
[文摘]:The prevalence of leukocyturia during annual examinations is related to recent activities and history data in 923 pilots. Urinary analysis was done and the results were cross-tabulated with answers from a questionnaire and with a past history of leukocyturia obtained from the pilot's chart. The prevalence of four to six or more white blood cells (WBCs) in the urinary sediment was 5.3 percent. Leukocyturia was 35.7 times more common (odds ratio) in those with a previous history of leukacyturia and a concomitant history of urethritis (p less than 0.0001). Yet, a history of leukocyturia accounted for only 18.1 percent of the cases of leukocyturia. There was a trend for an association between jogging and leukocyturia. The prevalence of leukocyturia was not affected by smoking, other physical exercise, a history of nephrolithiasis, air duty in the preceding 24 h, or a history of transient illness during the last 2 weeks. It is concluded that there is an association between a history of both leukocyturia and urethritis and leukocyturia. (Author)
[关键词]:AIRCRAFT PILOTS; LEUKOCYTES ; URINALYSIS ; UROLOGY ; AEROSPACE MEDICINE; SICKNESSES
[出版年份]:1991
[专业领域]:AEROSPACE MEDICINE

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