Understanding Pressure Vessel Steels: An Atom Probe Perspective
نویسندگان
چکیده
Published Elsevier Science Inc. 1044-5803/00/$–see front matter 655 Avenue of the Americas, New York, NY 10010 PII S1044-5803(99)00056-X 235 Understanding Pressure Vessel Steels: An Atom Probe Perspective M. K. Miller,* P. Pareige,*† and M. G. Burke‡ *Microscopy and Microanalytical Sciences Group, Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6376; †Groupe de Metallurgie Physique, UMR CNRS 6634, Faculté des sciences de l’université de Rouen, 76128 Mont Saint Aignan, France; and ‡Bechtel Bettis, Inc., West Mifflin, PA 15122
منابع مشابه
Grain Boundary Segregation in Commercial Nuclear Reactor Pressure Vessel Steels
Grain boundary (GB) segregation of impurity/solute atoms in surveillance test specimens of a commercial western-type pressurized water reactor pressure vessel (RPV) steel has been observed by using state-of-the-art 3D atom probe (3DAP) field ion microscope (laser-assisted local electrode-type atom probe: laser-LEAP). The GB segregation is considered to be an origin of the embrittlement of the R...
متن کاملNanoscale Microstructural Analyses by Atom Probe Field Ion Microscopy
Recent progress in atom probe field ion microscopy (APFIM) and its applications to nanoscale microstructural studies of metallic materials are reviewed. By employing a three dimensional atom probe (3DAP), it is possible to map out elemental distributions in the real space with almost an atomic resolution, and chemical analysis of interfaces and nanoparticles can be made with improved accuracy i...
متن کاملObservations of decomposition of martensite during heat treatment of steels using atom probe tomography
The decomposition of martensite during tempering or ageing is an important phenomenon as it leads to changes in the mechanical properties. These changes could take place during both steel manufacturing or in-service. Thus, their understanding is required to predict the material performance. Recent advances in the development of local electrode atom probes has led to a significant increase in th...
متن کاملThe combined effect of molybdenum and nitrogen on the fatigued microstructure of 316 type austenitic stainless steel
Introduction The mechanical properties of austenitic stainless steels, including the low cyclic fatigue behavior have been a subject of numerous studies [1-8]. Nitrogen addition, in general, increases the fatigue strength by decreasing the stacking fault energy of austenitic stainless steels [6]. The stacking fault energy has a strong influence on the cross slip difficulty, thus it affects the ...
متن کاملLocalizing of a Four-Level Atom via Absorption Spectrum
We propose a scheme for localizing an atom in a four-level configuration inside a classical standing wave field, conditioned upon the measurement of frequency of a weak probe field. In the classical standing wave field, the interaction between the atom and the field is position dependent due to the Rabi-frequency of the driving field. Hence, as the absorption frequency of the probe field is mea...
متن کامل