A dissociation transition in Zr3Al deformed at room temperature
- 1 March 1991
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Letters
- Vol. 63 (3) , 109-116
- https://doi.org/10.1080/09500839108205978
Abstract
In the L12 structure, a superdislocation with a 〈110〉 Burgers vector may undergo either one of the following basic dissociation schemes: This is exemplified by observations carried out under weak-beam conditions in Zr3Al deformed at room temperature. Different from the conclusions drawn by Howe, Rainville and Schulson (1974), it is found that superdislocations dissociated under scheme (II) coexist with others dissociated under scheme (I). The latter are commonly observed in Zr3Al provided the character of the parent dislocation is nearly screw. It is when the character is larger than about 40° that scheme (II) is activated. Extended, low energy SISFs then appear as the dominant feature within the microstructure.Keywords
This publication has 13 references indexed in Scilit:
- A TEM weak-beam study of dislocations in γ' in a deformed Ni-based superalloyPhilosophical Magazine A, 1988
- Weak-beam observation on Shockley partials in a Ni3(Al, Ti) single crystalPhilosophical Magazine Letters, 1988
- Dislocation line stability in Ni3AIPhilosophical Magazine A, 1986
- Fault energies in ordered and disordered Ni3FePhilosophical Magazine A, 1985
- The Effect of Temperature on Dislocation Structures in Ni3AlPhysica Status Solidi (a), 1985
- Dissociated structure of superlattice dislocations in Ni3Ga with the L12 structureActa Metallurgica, 1979
- Fault energies in ordered and disordered Cu3AuPhilosophical Magazine, 1976
- Transmission electron microscopy investigations of ordered Zr3AlJournal of Nuclear Materials, 1974
- Slip and climb processes in γ′ precipitation hardened nickel-base alloysScripta Metallurgica, 1968
- Dislocation configurations in AuCu3 and AuCu type superlatticesActa Metallurgica, 1961