Download or read book Iodine stress corrosion cracking of Zircaloy a summary of acoustic emission test work in the period March September 1981 written by A. Garlick and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iodine stress corrosion cracking of as received Zircaloy 4 at 700 degrees C and 800 degrees C written by D. Lim and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iodine stress corrosion cracking of as received zircaloy 4 at 700 degrees centigrade and 800 degrees centigrade written by D. Lim and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of iodine stress corrosion cracking (iscc) on the rupture behaviour of candu fuel sheathings at temperatures of 700 degrees c and 800 degrees c in isothermal hold tests were investigated under inert gas conditions. the sheaths were tested in the as-received condition with no braze zones or appendages . a test apparatus and specimen design were developed to provide an environment suitable for iscc during high temperature transient conditions. the burst tests showed that the deformation behaviour of the zircaloy tubes was not influenced by the presence of iodine at 800 degrees c at hoop stresses between 15 mpa-35 mpa, when subjected to temperature ramps of approximately 30 degrees c/s. iscc were observed at 700 degrees c at hoop stresses of 40-60-mpa. a three-fold reduction in sheath strain was observed in specimens which failed by iscc when compared with reference specimens containing no iodine. no significant difference in time-to-failure was observed between the reference specimens and the iodine specimens at both temperatures.
Download or read book Iodine stress corrosion cracking of as received zircaloy 4 at 700 degrees celsius and 800 degrees celsius written by D. Lim and published by . This book was released on 1980 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Out of Pile Testing of Iodine Stress Corrosion Cracking in Zircaloy Tubing in Relation to the Pellet Cladding Interaction Phenomenon written by M. Peehs and published by . This book was released on 1979 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: To investigate iodine stress corrosion cracking on the behavior of Zircaloy tubing, a standard test procedure with internally pressurized creep specimens (I-SCC standard test) and a split-ring test (I-SCC laboratory test) were developed. The threshold value for brittle cracking in iodine is 10-6 g iodine per square centimetre. The uniform elongation shows a clear minimum in its dependence on strain rate. Basal pole orientations in the range of ±50 to ±70 deg relative to the radial direction are the most I-SCC sensitive textures. The I-SCC process occurs in several stages; incubation, crack nucleation, and propagation. A thermodynamic evaluation indicates that I-SCC only occurs when zirconium iodides condense on the Zircaloy surface. Results show that comparisons of the I-SCC susceptibility of tubing manufactured in different manners should be made at the same point on the strain rate versus uniform elongation curves; for example, at the strain rate with the minimum of uniform elongation.
Download or read book Grain by Grain Study of the Mechanisms of Crack Propagation During Iodine Stress Corrosion Cracking of Zircaloy 4 written by AO. Dorado and published by . This book was released on 1994 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the tests conducted to determine the conditions leading to cracking of a specified grain of metal, during the iodine stress corrosion cracking (SCC) of zirconium alloys, focusing on the crystallographic orientation of crack paths, the critical stress conditions, and the significance of the fractographic features encountered. In order to perform crystalline orientation of fracture surfaces, a specially heat-treated Zircaloy-4 having very large grains, grown up to the wall thickness, was used. Careful orientation work has proved that intracrystalline pseudo-cleavage occurs only along basal planes. The effects of anisotropy, plasticity, triaxiality, and residual stresses originated in thermal contraction have to be considered to account for the influence of the stress state. A grain-by-grain calculation led to the conclusion that transgranular cracking always takes place on those bearing the maximum resolved tensile stress perpendicular to basal planes. Propagation along twin boundaries has been identified among the different fracture modes encountered.
Download or read book Stress Corrosion Cracking of Zircaloy in the Prescence of Iodine written by David Bruce Knorr and published by . This book was released on 1981 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iodine induced stress corrosion cracking of Zircaloy fuel cladding materials written by and published by . This book was released on 2000 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Correlation of Failure Times for Iodine SCC of Zircaloy written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A crack-growth model of stress corrosion cracking has been successfully applied to predict times-to-failure of zircaloy specimens exposed to iodine vapor. Data for two types of tests were analyzed using the model. The first was a variable loading experiment in which failure occurred after the specimen had been subjected to two distinct stresses in succession. The second was a series of tests in which surface roughness, and probably residual stress as well, was reduced by chemical polishing of the specimens. The success of the crack growth model in dealing with these situations suggests that crack propagation rather than crack initiation is the rate-controlling step in iodine stress corrosion cracking of zircaloy. Furthermore, the metal in the vicinity of the growing crack is apparently so embrittled by iodine that a model originally intended for ceramics applies.
Download or read book On the stress corrosion cracking of zircaloy fuel sheathing in iodine at 573 k written by C. P. Ashdown and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors affecting stress corrosion cracking of zircaloy in iodine vapour written by J. C. Wood and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress corrosion cracking of zircaloy in iodine a probable failure mechanism in water reactor fuel pins written by A. Garlick and published by . This book was released on 1969 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory study of stress corrosion cracking of zircaloy 2 in iodine at 300 degrees c written by J. C. Wood and published by . This book was released on 1970 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The effects of three different coatings on iodine induced stress corrosion cracking of zircaloy 4 written by B. A. Surette and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iodine stress Corrosion Cracking of Zircaloy 2 Cladding Under Near Plane Strain and Localized Stress strain Conditions written by Bernardo do Nascimento Nobrega and published by . This book was released on 1984 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Aspects of Iodine Induced Stress Corrosion Cracking of Zircaloys written by D. Cubicciotti and published by . This book was released on 1982 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thermodynamics of the zirconium-iodine system are summarized. In the gas phase are four stable species: ZrI4, ZrI3, ZrI2, and ZrI. Their enthalpies of formation and free-energy functions are presented. The only one of those species relevant to stress corrosion cracking (SCC) of zirconium alloys by iodine is the tetraiodide. There are also four solid compounds corresponding approximately in composition to the tetra, tri, di, and monoiodides. Ranges of solid solution composition, enthalpies of formation, and free-energy functions for those phases are given. Thermodynamic information for iodine chemisorbed on zirconium surfaces is also presented. These thermochemical results are used to analyze chemical behavior in situations related to SCC. In particular, reaction of cesium iodide with uranium dioxide in a fuel rod may produce an iodine pressure large enough to result in chemisorbtion of iodine on clean zirconium.
Download or read book SCCIG written by and published by . This book was released on 1980 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
