Download or read book Swelling in Electron Irradiated Type 316 Stainless Steel written by FA. Garner and published by . This book was released on 1975 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: To study void swelling behavior for clues regarding the anticipated performance of Type 316 stainless steel in fast reactor environments, two series of electron irradiation experiments were conducted. The first series of experiments were conducted on material which was prototypic of fast test reactor (FTR) steels in composition, but not microstructure. The results indicated that swelling values exceeding 100 percent could easily be obtained in annealed Type 316 and that cold rolling of this material could lead to an increase in the incubation fluence and a reduction in the subsequent swelling rate. The void volume fraction in both the annealed and cold-rolled specimens developed at a constant rate after the incubation period.

Download or read book The Effect Of A Temperature Change On Void Swelling In Electron Irradiated Stainless Steel Type 316 written by D. I. R. Norris and published by . This book was released on 1975 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Swelling and Tensile Property Changes in Neutron Irradiated Type 316 Stainless Steel written by KR. Garr and published by . This book was released on 1976 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specimens of Type 316 stainless steel, given different thermomechanical treatments resulting in either a cold-worked or solution-annealed and aged structure, were irradiated in the Experimental Breeder Reactor-II (EBR-II) at 500 to 600 °C (932 to 1112°F) to a fluence of 7.4 x 1026 neutrons (n)/m2 (E > 0.1 MeV). Three specimen configurations were used: small sheet tension specimens, small right-circular cylinders for immersion density, and thin foils for transmission electron microscopy (TEM). TEM revealed voids in all specimens. Immersion density indicated swelling in cold-rolled specimens only after irradiation at temperatures near 600°C (1112°F). Considerable recovery and precipitation were observed in the cold-rolled specimens. Results of tension tests revealed an increase in strength and decrease in ductility for specimens originally in a solution-annealed and aged condition. Cold-rolled specimens exhibited a decrease in strength and a slight increase in total elongation. True stress-true plastic strain was best described by the Ludwigson equation, ? = K3?n3 ± exp (K4 + n4?), in all cases. Irradiation causes a decrease in the work-hardening exponent, n3, and strength factor, K3. After irradiation, the values of n3 and K3 tended toward common values for both preirradiation treatments.

Download or read book The Microstructural Evolution and Swelling Behavior of Type 316 Stainless Steel Irradiated in HFIR written by S. Hamada and published by . This book was released on 1990 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solution annealed (SA) and 20% cold worked (CW) Type 316 (UNS S 31600) stainless steels were irradiated in the high flux isotope reactor (HFIR) to 55 dpa and to 3445 appm helium at 300 to 500°C. The irradiated specimens were examined by transmission electron microscopy (TEM) to evaluate microstructural evolution. At irradiation temperatures of 400°C and below, there was very little difference in the microstructural and swelling behavior between SA and CW material. A high concentration of fine bubbles was uniformly dispersed in the matrix. Swelling was very low (

Download or read book Properties of Reactor Structural Alloys After Neutron Or Particle Irradiation written by C. J. Baroch and published by ASTM International. This book was released on 1975 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Void Swelling Behaviour of Electron Irradiated Type 316 Austenitic Steel written by M.J. Makin and published by . This book was released on 1980 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Swelling and Mechanical Property Changes in Neutron irradiated Cold rolled Type 316 Stainless Steel written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Samples of cold-rolled Type 316 stainless steel were irradiated in EBR- II to a fluence of about 8 x 10$sup 26$ n/m$sup 2$ (E greater than 0.1 MeV) at 500 and 600$sup 0$C. Three sample configurations were used--small sheet tensile samples, small right-circular cylinders for immersion density, and thin foils for transmission-electron microscopy (TEM). TEM revealed voids in the foils irradiated at both temperatures. Immersion density results, however, indicated swelling only in the sample irradiated at 600$sup 0$C. Considerable recovery and precipitation were observed in foils irradiated at both temperatures. Results of tensile tests on irradiated samples showed a decrease in yield strength and an increase in ductility compared to unirradiated controls. (auth).

Download or read book Some Observations on the Effect of Stress on Irradiation Induced Swelling in AISI Type 316 Stainless Steel written by WL. Bell and published by . This book was released on 1985 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: An evaluation of the effect of stress on the swelling behavior of 20% cold-worked AISI Type 316 stainless steel was conducted. Beam specimens strained in a four-point bending mode during fast neutron irradiation in Experimental Breeder Reactor-II (EBR-II) were selected for this study. Peak elastic fiber stresses in the beams ranged from 140 to 320 MPa during irradiation to 8 x 1022 neutrons (n)/cm2 (E > 0.1 MeV) at temperatures of 685 and 697 K. Regions of the beams corresponding to tensile, compressive, and neutral loading were examined by transmission electron microscopy (TEM) to evaluate the type, morphology, and distribution of irradiation-induced voids.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Radiation on Materials written by Margaret L. Hamilton and published by ASTM International. This book was released on 2000 with total page 1266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1474 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Void Formation in Cold Worked Type 316 Stainless Steel Irradiated with 1 MeV Protons written by DW. Keefer and published by . This book was released on 1975 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold-worked Type 316 stainless steel was irradiated at 500and 600°C with 1-MeV protons. The dependence of void formation on displacement damage, irradiation temperature, and microstructure was studied by transmission electron microscopy. Cold working delays the onset of swelling and reduces it, via a reduction in void size, at both irradiation temperatures. Inhomogeneity in the cold-worked microstructure leads to inhomogeneity in the disposition of voids. Swelling at 600°C is greater than at 500°C; the voids are less numerous but larger at the higher temperature. No change in the cold-worked microstructure can be detected by transmission electron microscopy after 500°C irradiation to 23 displacements per atom. Irradiation to a comparable damage level at 600°C results in almost complete elimination of the cold-worked microstructure. Comparison of the results is made with data from reactor irradiation experiments.

Download or read book The Temperature Dependence of Void Swelling in Electron Irradiated Stainless Steel Type 304 written by J. T. Buswell and published by . This book was released on 1974 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Void Swelling and Microstructural Change in Neutron Irradiated Type 316 Stainless Steel written by M. Itoh and published by . This book was released on 1987 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microstructural observations were made on cold-worked Type 316 stainless steel following fast neutron irradiation to a peak neutron fluence of 1.3 x 1027 n/m2 (E > 0.1 MeV) at temperatures from 400 to 620°C. The results show that nickel depletion in the matrix after neutron irradiation is related to the formation of phosphides and void swelling. Phosphorus in solution retards not only the recovery of dislocations but also the development of nickel- and silicon-rich phases, and this results in suppressing nickel depletion in the matrix and an extension of the transient regime in void swelling. Phosphides are formed during the transient regime at temperatures from 490 to 570°C. After phosphides are formed, retardation effects on both dislocation recovery and the formation of nickel- and silicon-rich phases are lost, and this leads to the onset of void swelling.

Download or read book Void Swelling Behavior of Types 304 and 316 Stainless Steel Irradiated with 4 MeV Ni Ions written by SG. McDonald and published by . This book was released on 1973 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed study has been made of the void and dislocation microstructure of Types 304 and 316 stainless steel irradiated with 4-MeV 58N+ at a displacement rate of 5 x 10-3 dpa/s-1. The range of dosages investigated were 20 to 350 dpa at 525 C (977 F) and 20 to 250 dpa at 600 C (1112 F) for Type 304 stainless steel and 20 to 250 dpa at 525 C for Type 316. The maximum swelling data for Type 304 stainless steel may be represented by a power-law dependence on-dosage with exponents of 1.4 and 1.8 at 525 and 600 C, respectively. The swelling at 600 C, which is much greater than that at 525 C, is due to the more rapid growth of voids at the higher temperature. No evidence of a reduction in swelling rate at high dosages was found at either temperature. The swelling of Type 316 stainless steel shows a tendency to be lower than that of Type 304 and, at higher dosages, is a factor of two less. In 20 percent cold-worked Type 316 stainless steel, swelling was suppressed until the dislocation structure was recovered.

Download or read book Radiation induced Changes in Microstructure written by F. A. Garner and published by ASTM International. This book was released on 1987 with total page 919 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of Applied Stress on Swelling Behavior in Type 304 Stainless Steel written by T. Fujihira and published by . This book was released on 1985 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The swelling behavior of Type 304 stainless steel during stress application was investigated by means of electron irradiation using a high-voltage electron microscope (HVEM). The dose dependence of swelling under stress is similar to the linear-after-incubation swelling scheme of other electron irradiation studies. The effect of applied stress on the swelling characteristics appeared through the control of incubation regime of swelling rather than of the swelling rate. The incubation dose first increases, then decreases, and increases again with increasing applied stress. The prominent finding in this study, based on the advantage of HVEM in situ observation, is that the saturated void density is equal to the number density of interstitial dislocation loops observed in the early stage of irradiation. Essentially, applied stress affects the loop nucleation process. The dislocation loop density then affects the incubation dose of swelling through its control of dislocation behavior and the saturation dose of dislocation density.