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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 81 (1977), S. 898-905 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 2279-2285 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: KDP, KD*P, and LiNbO3, three nonlinear optical materials that have been difficult to coat, are treated with polymeric surface layers. These layers hermetically seal the hygroscopic crystal surfaces. Their optical properties, thermal compatibility, high-power laser damage behavior, abrasive resistance, and suitability for overcoating with traditional, dielectric antireflection multilayers are reported.
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 10787-10793 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 4003-4007 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 4008-4011 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 4 (1990), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Ozone is increasingly being considered as a means of improving the organoleptic quality of lowland surface waters, often in conjunction with granular activated carbon. This paper relates the experiences of Bristol Water, who have recently introduced this process at Littleton water-treatment works to resolve long-standing taste and odour problems. It describes the background to the project, and briefly discusses alternative processes considered before choosing ozone.The results of the pilot-plant studies used to assess the effectiveness of the biological process promoted by ozone are reviewed. Performance requirements specified in the contract for the full-scale plant are then outlined, together with a description of the civil works and equipment. Finally, consideration is given to the methods which will be used to evaluate the success of the project.
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 18 (1995), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract—High temperature low cycle fatigue tests, with and without strain dwells, were conducted at 750°C, 950°C and 1050°C, on single crystal SRR99 nickel base superalloy, with different crystal orientations. At 750°C, SSR99 exhibited cyclic stability regardless of cycle type. The presence of strain dwells caused cyclic softening at 950°C compared with continuous cycling tests. At 1050°C, cyclic softening was observed for all the tests. The introduction of strain dwells produced significant stress relaxation at 950°C and 1050°C, but not at 750°C for the strain ranges in this study. Significant mean stress was observed at the three temperatures for tests with tensile or compressive strain dwells. The crystal orientation was found to have a dominating influence on the cyclic stress strain relationship and stress relaxation response. A simple approach is developed to correlate the effect of orientation on the cyclic mechanical response.
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 14 (1991), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Procedures developed by Ainsworth and Smith and Webster to assess the remaining life of high temperature engineering components containing cracks are presented and applied to a practical example of a °CrMoV steel pressure vessel operating at 565°C. The general principles of the procedures are similar. Net section creep rupture is described in terms of the reference stress method and creep crack initiation and growth is predicted using the non-linear (creep) fracture mechanics parameter C*. However, the details of each procedure are shown to differ. The main differences lie in the predicted times for net section creep rupture and creep crack initiation. Ainsworth's method predicts shorter creep rupture times than Smith and Webster's procedure. The initiation time using the Smith and Webster procedure is predicted to occur shortly after loading while Ainsworth's estimate is about 40% of the life of the vessel. Both procedures predict similar times for failure by creep crack initiation and crack growth.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    PO Box 1354, 9600 Garsington Road, Oxford OX4 2XG, UK. : Blackwell Science Ltd
    Fatigue & fracture of engineering materials & structures 28 (2005), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Experimental creep crack growth (CCG) test data are obtained by following standards that characterize CCG rates using the C* parameter. Such data are then used in high-temperature failure assessment procedures. An alternative approach to defect assessment at high-temperature failure is an extension of the R6 failure assessment diagram (FAD). At high temperature, creep toughness, Kcmat, can be estimated from CCG tests and replaces low-temperature toughness in R6. This approach has the advantage that it is not necessary to establish a creep fracture regime, such as small-scale, primary or widespread creep. Also, a new strain-based FAD has been developed, potentially allowing variations of stress and temperature to be accommodated. In this paper, the results of a series of crack growth tests performed on ex-service 316H stainless steel at 550 °C are examined in the light of the limitations imposed by ASTM for CCG testing. The results are then explored in terms of toughness and presented in FADs.
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 18 (1995), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract—Experimental and theoretical investigations on the influence of temperature, strain dwells and crystal orientation on the high temperature fatigue-creep life behaviour of single crystal SRR99 nickel base superalloy were performed. For a given temperature and loading condition, the longest fatigue life was observed for tests with [001] orientations, while the [111] orientation yielded the shortest fatigue life. A simple approach, using an orientation function f(AhkI), was applied successfully to correlate the influence of orientation. Using this function, the shortest fatigue life was observed for tests with a compressive dwell at 750°C, but at 1050°C tests with a tensile dwell exhibited the shortest life. Compared with continuous cycling tests, tests with tensile dwells showed remarkably longer lives at 750°C, significantly shorter lives at 1050°C, and almost identical lives at 950°C; tests with compressive dwells always exhibited shorter lives than continuous cycling tests at all temperatures. The influence of strain dwells on the life of SRR99 was via the simultaneous effects of mean stress, additional inelastic strain, and time dependent damage. A mean stress modified strain range partitioning method was proposed and used to predict the fatigue-creep life.
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