Atomic Transport and Defects in Metals by Neutron Scattering: Proceedings of an Iff-Ill Workshop Jülich, Fed. Rep. of Germany, October 2-4, 1985

ISBN-13: 9783642710094 / Angielski / Miękka / 2011 / 241 str.

Christian Janot; Winfried Petry; Dieter Richter

Opis

The Institut Max-von-Laue-Paul Langevin (ILL) in Grenoble regularly organ ises workshops that deal with the various applications of neutrons in physics, chemistry, biology and also in nuclear physics. The workshop" Atomic Trans port and Defects in Metals by Neutron Scattering," jointly organised by the Institut Laue-Langevin and the Institut fiir Festkorperforschung of the KFA Jiilich, was held in October 1985 in Jiilich. The study of problems in metal physics and in physical metallurgy is a traditional field of neutron scattering. The most commonly used methods are diffuse elastic, small-angle and inelastic scattering of neutrons. A number of problems can be identified where neutrons yield information that is supple mentary to that from other methods such as x-ray diffraction, synchrotron radiation or electron microscopy. In certain fields, for example spectroscopy for the investigation of atomic motions or for the investigation of magnetic properties, neutron scattering is a unique method. The facilities at the High Flux Reactor of the ILL, and also at the Jiilich and at other medium flux research reactors, have contributed numerous re sults in these fields. It was the aim of this workshop to give a survey of the present state of neutron scattering in metal physics."

Spis treści

Introductory Lecture. A Comparison of Neutrons and Synchrotron Radiation for Defect Studies.- I Short Range Order.- Monte Carlo Simulation of Alloy Phase Diagrams and Short-Range Order.- The Determination of Atomic Interaction Energies in Solid Solutions from Short Range Order Coefficients — An Inverse Monte Carlo Method.- Short-Range Order and Atomic Interaction in NiCrx.- High T-Dependence of Local Order in Magnetic FeM Alloys from Neutron Diffuse Scattering.- Short-Range Order in a Ni63.7 Zr36.3 Amorphous Alloy. Effects of Structural Relaxation.- A SANS Approach to Possible Hierarchical Structures of Defects in Amorphous Alloys.- SANS Measurements on Metallic Glasses and the Contributions of Nuclear and Magnetic Structure Defects and of the External Surfaces.- Short-Range Order in Metallic Glasses.- II Precipitation and Growth; Time-Dependent Experiments.- Phase Separation in Alloys Using Low Q Neutron Scattering.- SANS-Investigation of Early Stage Precipitation Kinetics in Cu-2.9 at.% Ti.- Phase Transformations in Fe-Cu-Alloys — SANS-Experiments and Theory.- Kinetics of Order-Disorder Phenomena in Some Intermetallic Platinum-Based Alloys.- Studies of Heterogeneities of Micrometer-Range with Double Crystal Diffractometer.- Decomposition Kinetics in the Superalloy Nimonic PE16 and the System NiAlTi Investigated by TEM, FIM and SANS.- Comparative TEM, FIM and SANS Study of the Cu-2 at.% Co Decomposition.- Quantitative Measurement of Anomalous Small-Angle X-Ray Scattering (ASAXS) in Some Al-Zn-Ag Alloys.- III Hydrogen in Metals.- Interstitial Point Defects (D,N,O) in Transition Metals.- Coherent Quasi-Elastic Scattering of Neutrons from Lattice Gas Systems.- Mechanism of Hydrogen Diffusion in Intermetallic Hydrides.- Hydrogen Diffusion in Amorphous Liquid-Quenched PdxSi1-x Hy Measured by QNS.- IV Diffusion in Alloys and Hydrogen in Metals.- Quasielastic Neutron Scattering Study of Fast Diffusion of Co in ?-Zr.- Systematic Investigation of Self-Correlation Functions in Cubic Lattices; Mono- and Divacancy Mechanisms.- Quasielastic Coherent Scattering for Atomic Diffusion via Vacancies.- Lattice Dynamics and Interstitial Motion.- Interatomic Forces Near a Hydrogen Impurity in Metals.- H Tunneling and Local Diffusion in NbOxHy.- Jahn-Teller Relaxation Effects in the Inelastic Neutron Scattering Spectra of Hydrogen Metal Systems.- Localized Vibrations of Hydrogen in Metals.- One-, Two- and Three-Dimensional Disorder of D-Atoms in Non-Stoichiometric TaDx.- Neutron Radiography Studies of Spinodal Decomposition in NbHx.- V Point Defects, Radiation Damage, Voids, and Bubbles.- Irradiation Damage in Metals: A Story of But Also’s.- Determination of Helium Densities in Bubbles Using a Contrast Variation Method.- Studies of Stress- and Fatigue-Induced Defects Using Small-Angle Neutron Scattering.- Neutrons in Practical Metallurgy.- Point Defects in Metals in Thermal Equilibrium.- Saturation of Irradiation-Induced Precipitation.- Analysis of Defect Microstructures in Irradiated Ferritic Alloys.- Influence of Electron Irradiation on Decomposition Kinetics and Morphology in CuNiFe Alloys.- Index of Contributors.

O autorze

Dieter Richter, geboren 1938 in Hof, war bis 2004 Professor für Kritische Literaturgeschichte an der Universität Bremen und ist Autor zahlreicher, in Deutschland und Italien erschienener Bücher zur europäischen Kulturgeschichte. Er lebt in Bremen und ist Ehrenbürger von Amalfi. Für sein Buch »Der Süden. Geschichte einer Himmelsrichtung« erhielt er den NDR Kultur Sachbuchpreis 2009.