Oscillatory relaxations in (111) planar defects in Ni3Al
- 1 October 1989
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 60 (4) , 433-446
- https://doi.org/10.1080/01418618908213871
Abstract
Computer simulation results are presented for various types of planar defect occurring on the (111) plane of the intermetallic compound Ni3 A1. The relaxed defect structures produce oscillations in the static displacements, both perpendicular and parallel to the boundary plane. This type of relaxation behaviour is related to the fact that the ordered lattice contains more than one atom per lattice site. Therefore, two different types of static distortion mode are found which, by analogy with lattice vibration modes, are called acoustic and optical. For the planar defects studied here, these two types of distortion mode were separated and it was found that the optical distortion mode is of similar nature in all of them. The acoustic mode is similar to that found in pure Ni and A1.Keywords
This publication has 8 references indexed in Scilit:
- The influence of local volume forces on surface relaxation of pure metals and alloys: Applications to Ni, Al and Ni3AlPhilosophical Magazine A, 1988
- Application of the embedded atom method to Ni3AlJournal of Materials Research, 1987
- Oscillatory Surface Relaxations in Ni, Al, and Their Ordered AlloysPhysical Review Letters, 1986
- Space Group Theoretical Analysis of Grain Boundaries in Ordered AlloysPhysica Status Solidi (a), 1986
- Effect of boron on grain-boundaries in Ni3Al†Acta Metallurgica, 1985
- Embedded-atom method: Derivation and application to impurities, surfaces, and other defects in metalsPhysical Review B, 1984
- Dissociation and core structure of 〈110〉 screw dislocations in L12ordered alloys I. Core structure in an unstressed crystalPhilosophical Magazine A, 1982
- Computer simulation of edge and screw dislocations in copperJournal of Physics F: Metal Physics, 1972