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Book Effects of Radiation on Substructure and Mechanical Properties of Metals and Alloys

Download or read book Effects of Radiation on Substructure and Mechanical Properties of Metals and Alloys written by John Moteff and published by ASTM International. This book was released on 1973 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Symposium on Radiation Effects on Metal and Nuetron Dosimetry

Download or read book Symposium on Radiation Effects on Metal and Nuetron Dosimetry written by and published by ASTM International. This book was released on with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Effect of Neutron Irradiation on Mechanical Properties of Ferritic Steels

Download or read book Effect of Neutron Irradiation on Mechanical Properties of Ferritic Steels written by and published by . This book was released on 1995 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effect of neutron radiation exposure was investigated in various ferritic steels with the main emphasis being the effects of thermal neutrons on radiation hardening. Pure iron of varied grain sizes was also used for characterizing the grain size effects on the source hardening before and after neutron irradiation. While many steels are considered in the overall study, the results on 1020, A516 and A588 steels are emphasized. Radiation hardening due to fast neutrons was seen to be sensitive to the composition of the steels with A354 being the least resistant and A490 the least sensitive. Majority of the radiation hardening stems from friction hardening, and source hardening term decreased with exposure to neutron radiation apparently due to the interaction of interstitial impurities with radiation produced defects. Inclusion of thermal neutrons along with fast resulted in further decrease in the source hardening with a slight increase in the friction hardening which revealed a critical grain size below which exposure to total (fast and thermal) neutron spectrum resulted in a slight reduction in the yield stress compared to the exposure to only fast neutrons. This is the first time such a grain size effect is reported and this is shown to be consistent with known radiation effects on friction and source hardening terms along with the observation that low energy neutrons have a nonnegligible effect on the mechanical properties of steels. In ferritic steels, however, despite their small grain size, exposure to total neutron spectrum yielded higher strengths than exposure to only fast neutrons. This behavior is consistent with the fact that the source hardening is small in these alloys and radiation effect is due only to friction stress.

Book Damage function Analysis of Neutron energy and Spectrum Effects Upon the Radiation Embrittlement of Steels

Download or read book Damage function Analysis of Neutron energy and Spectrum Effects Upon the Radiation Embrittlement of Steels written by C. Z Serpan (Jr) and published by . This book was released on 1969 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents the results of a new, comprehensive set of experimental data conforming to the irradiation conditions of the derived damage function (material, temperature, and fluence). The results of this experiment are discussed in terms of their establishing the validity of the damage function. Averaged values of the damage function are tabulated for a typical reactor physics calculation energy group structure, and their application to two different spectra is described. Finally, the damage-function fluences required to cause a 200F Delta-TT in A302-B steel are presented for many different reactor locations. For each of the spectra involved, the upper and lower energy limits of significantly damaging neutrons are given, and some detail is also provided regarding the contribution of subgroups within the overall energy spectrum. (Author).

Book Effects of Radiation on Structural Metals

Download or read book Effects of Radiation on Structural Metals written by Books on Demand and published by ASTM International. This book was released on 1967 with total page 723 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effect of Nuclear Radiation on Structural Metals

Download or read book The Effect of Nuclear Radiation on Structural Metals written by Frederic R. Shober and published by . This book was released on 1961 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of fast-neutron (>1 Mev) irradiation on the mechanical properties of structural metals and alloys was studied. Although the yield strengths and ultimate tensile strengths are increased su stantially for most materials, the ductility suffers severe decreases. This report presents these changes in properties of several structural metals for a number of neutron exposures within the 1.0 x 10 to the 18th power to 5.0 x 10 to the 21st power n/sq cm range. Data summarizing these effects on several classes of materials such as carbon steels, low-alloy steels, stainless steels, Zr-base alloys, ni-base alloys, Al-base alloys, and Ta are given. Additional data which show the influence f irradiation temperatures and of post-irradiation annealing on the radiation-induced property changes are also given and discussed. Increases as great as 175% in yield strength, 100% in ultimate strength, and decreases of 80% in total elongation are reported for fast-neutron exposures as great as 5 10 to the 21st power n/sq cm. (Author).

Book Discussion of the Possible Dose Rate Effect in Irradiation of Pressure Vessel Steel

Download or read book Discussion of the Possible Dose Rate Effect in Irradiation of Pressure Vessel Steel written by C. Z Serpan (Jr) and published by . This book was released on 1973 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 'dose-rate effect' for low alloy steel is based on the premise that radiation damage will be greater for a given fluence of neutrons when irradiation takes place at a low flux level over a long time than for irradiation for a short time at a high flux level. These are the conditions under which accelerated irradiations are performed for short times to establish anticipated lifetime mechanical property changes in reactor vessel components that will be under irradiation for long times at low flux levels. The available theoretical and experimental evidence related to the dose-rate effect in low alloy steel has been reviewed and is discussed. The conclusion reached is that trends in steel hardening and embrittlement by neutron irradiation are not noticeably influenced by the rate of irradiation when the rates (fluxes) are between 10 to the 10th power and 10 to the fourteenth power n/sq cm per sec, and the fluence received is 1x 10 to the twentieth power n/sq cm1 MeV. (Author).

Book Effects of Neutron Dose Dose Rate and Irradiation Temperature on the Irradiation Embrittlement of a Low Copper Reactor Pressure Vessel Steel

Download or read book Effects of Neutron Dose Dose Rate and Irradiation Temperature on the Irradiation Embrittlement of a Low Copper Reactor Pressure Vessel Steel written by M. Narui and published by . This book was released on 2005 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of irradiation experiments to investigate the effects of neutron fluence and flux on reactor pressure vessel (RPV) steels has been performed using the Japan Material Testing Reactor (JMTR). The irradiation temperature has been precisely controlled at 290°C within an error of ±2°C during reactor operation. The neutron fluence and flux ranged from 9.3 × 1017 to 1.1 × 1020 n/cm2 and from 1.4 × 1011 to 6.3 × 1013 n/cm2/s, respectively. The material used in the present study was an A533B RPV steel in which the copper and phosphorous concentrations are 0.03 and 0.002 wt%, respectively. Charpy impact test results with one-third sized specimens showed no dose-rate dependence. Microstructural observation revealed that a higher irradiation temperature at around 340°C resulted in formation of rather large dislocation loops and smaller microvoids.

Book Analysis of Reactor Vessel Radiation Effects Surveillance Programs

Download or read book Analysis of Reactor Vessel Radiation Effects Surveillance Programs written by Lendell E. Steele and published by ASTM International. This book was released on 1970 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: