Dislocation Structure in Single Crystal L1o Type Ti-Al-V Compound
- 1 January 1990
- journal article
- Published by Springer Nature in MRS Proceedings
Abstract
Single Crystals of L1o type Ti44Al54V2 alloy were deformed at high temperatures and various orientations. The dislocations thus produced by single slip were studied by TEM. 1/2<110] dislocations produced at 1073 K consist of dislocation loops and curled dislocations with spiral segments, which is in agreement with those shown in the polycrystalline Ti-Al-V, and -Nb alloys deformed under the same conditions. The normal dislocations produced at 873 K pile up in groups, each of which contains several straight dislocations with a screw character. On the other hand, the majority of superdislocations produced at 873 K were found in a dipole form, indicating that the dipole is a favorable configuration at this temperature.Keywords
This publication has 6 references indexed in Scilit:
- Elastic constants, fault energies, and dislocation reactions in TiAl: A first-principles total-energy investigationPhilosophical Magazine Letters, 1990
- Mechanical properties and dislocation structures of TiAl single crystals deformed at 4.2–293 KActa Metallurgica et Materialia, 1990
- Positive temperature dependence of the yield stress in L1o type Ti/1bAl/1bV compoundScripta Metallurgica et Materialia, 1990
- Dissociation of superdislocations at yield stress peak in L1o type Ti-Al-Nb compoundScripta Metallurgica et Materialia, 1990
- Weak-beam observation of a dissociation transition in TiAlPhilosophical Magazine A, 1988
- Positive temperature dependence of the yield stress in TiAl L10 type superlattice intermetallic compound single crystals at 293–1273 KActa Metallurgica, 1985