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Keywords: voids
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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2004
ISBN-10: 0-8031-3477-0
ISBN: 978-0-8031-3477-5
... Void swelling in structural materials used for nuclear reactors is characterized by an incubation period whose duration largely determines the utility of the material for core components. Significant evolution of the dislocation and void microstructures that control radiation-induced swelling...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2004
ISBN-10: 0-8031-3477-0
ISBN: 978-0-8031-3477-5
... Recent studies associated with light water reactors (LWR) in both the USA and Russia have raised the question of void swelling in austenitic components of core internals. One question of particular interest is the range of temperatures over which voids can develop, especially the lowest...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2001
ISBN-10: 0-8031-2878-9
ISBN: 978-0-8031-2878-1
... by nonuniformly distributed highly elongated voids. Deformation is by motion of a ∕ 2 <111> dislocations, which interact with and decompose irradiation-induced a<100> loops. The structure formed after extensive deformation consists of highly complex cell walls and moderate densities...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2001
ISBN-10: 0-8031-2878-9
ISBN: 978-0-8031-2878-1
...) and those which may be present in future advanced reactors designs. TEM analysis was employed to elucidate the effect of radiation on the dislocation, void and precipitate structures as a function of irradiation conditions. A moderate dose-rate effect was observed for samples which were irradiated at dose...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2858-4
ISBN: 978-0-8031-2858-3
..., and 5 experiments. From statistical analysis, it was found that the doweled joints have significantly higher LTEs than the non-doweled joints. Voids at the slab joints and corners were computed by examining the deflection data of the joint and corner tests at different load levels. The loss of support...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2858-4
ISBN: 978-0-8031-2858-3
... to pavement characterization. pavements pavement management Ground Penetrating Radar GPR thickness quality control stripping delamination voids Kenneth 1L Maser1 Pavement Characterization Using Ground Penetrating Radar: State of the Art and Current Practice Reference: Maser, K. R., "Pavement...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2614-X
ISBN: 978-0-8031-2614-5
... ion accelerator. The simultaneous ion injection rate was 20 at.ppm He/ dpa at 70KeV and irradiation temperatures were 723 K and 773K. In the phosphorus containing alloy, vacancy type dislocation loops were nucleated in the early irradiation stage with electrons beam irradiation. Voids were nucleated...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1994
ISBN-10: 0-8031-1488-5
ISBN: 978-0-8031-1488-3
... particularly in terms of helium generation rate and recoil energy. copper Cu-Al 2 O 3 600 MeV protons helium multi-displacement cascades grain boundaries twin boundaries bubbles voids cavities Bachu N. Singh I and Andy Horsewell I EFFECTS OF CASCADE DAMAGE AND HELIUM PRODUCTION UNDER 600 MeV...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1994
ISBN-10: 0-8031-1865-1
ISBN: 978-0-8031-1865-2
... The partial loss of subgrade support associated with voids under portland cement concrete (PCC) pavements leads to increased deflections and increased load stresses. This can cause a significant reduction in the fatigue life of the pavement. This paper presents the findings of a comprehensive...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1994
ISBN-10: 0-8031-1488-5
ISBN: 978-0-8031-1488-3
... was significant, swelling was negligible. In specimens where Ti 2 O and Ti 5 Si 3 precipitation was significant, ductility was relatively low. vanadium-base alloys fusion reactor first wall neutron irradiation dose, precipitation titanium compounds impurities voids density change mechanical...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1482-6
ISBN: 978-0-8031-1482-1
... examined the impact of these conditions on the development of voids within the sealant, softening or tackiness on the sealant, and crazing and splitting at the sealant surface. Improper mixing created most of the large internal voids. Application of sealant on a damp substrate produced foaming...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1477-X
ISBN: 978-0-8031-1477-7
... Spatially random void distribution results in small spatial variations of void growth rate from void to void With a constant density of dislocations and continuous point-defect generation, an average net vacancy flux towards a void decreases with increasing void concentration So...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1991
ISBN-10: 0-8031-1399-4
ISBN: 978-0-8031-1399-2
... information on the various aspects of the kinetics of the cavitation process without involving any assumptions. Stereology cavities voids creep kinetics quantitative microscopy Arun M. Gokhale UTILITY OF STEREOLOGICAL MEASUREMENTS IN THE STUDY OF CREEP CAVITATION KINETICS REFERENCE: Gokhale A.M...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1266-1
ISBN: 978-0-8031-1266-7
... Martensitic/ferritic 9Cr-1MoVNb and 12Cr-1MoVW steels doped with up to 2 wt% nickel have up to 450 appm helium after High Flux Isotope Reactor (HFIR) irradiation to ̃38 dpa, but only 5 appm helium after 47 dpa in Fast Flux Test Facility (FFTF). No fine helium bubbles and few or no larger voids...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1266-1
ISBN: 978-0-8031-1266-7
... ferritic steels under ion irradiation up to 200 dpa were investigated. The specimens were irradiated with 200 keV C + or 3 MeV Ni 2+ ions between 698 and 898 K. Post irradiation microstructures were observed with transmission electron microscopes. Few voids were detected in MA957. Dislocation structure...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1266-1
ISBN: 978-0-8031-1266-7
...-martensitic steel microstructure mechanical properties aging irradiation precipitation phase voids dislocations loops V. S. A g u e e v , z V. N. B y k o v , ~A . M. Dvoryashin, 1 V. N. Golovanov, t E. A. Medvedeva, t V. V. Romaneev, l V. K. Shamardin, 1 and A. N. Vorobiev I Influence of Structure...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1266-1
ISBN: 978-0-8031-1266-7
... The Japanese prime candidate alloy (JPCA). a titanium-modified austenitic stainless steel, has shown good performance after irradiation in the high flux isotope reactor (HFIR) up to 34 dpa at 300 to 600°C, but considerable void swelling develops in solution annealed (SA) JPCA after irradiation...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1266-1
ISBN: 978-0-8031-1266-7
... of 0.2% after 40 dpa was observed in the 1.4914 alloy. The results confirmed the superiority of the ferritic steel over the austenitic steels in respect of void-induced swelling. stainless steels ion irradiation radiation-induced precipitation voids swelling electron microscopy fusion...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1266-1
ISBN: 978-0-8031-1266-7
... The motion of point defects is random. In the present paper the influence of the stochastic fluctuations of the point defect concentrations in the close vicinity of a void on the void ensemble kinetics is investigated. The investigation is based on the kinetic equation for the void distribution...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1267-X
ISBN: 978-0-8031-1267-4
... that the steel could contain the least amount of high activation elements such as nickel and nitrogen, and several alloys were selected as potential materials for fusion reactor. austenitic steels stainless steels superalloys alloy design phase stability molecular orbital calculations voids swelling...
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