Dislocation structure in precipitation-hardened Ir-based binary alloys

Citation
Y. Yamabe-mitarai et al., Dislocation structure in precipitation-hardened Ir-based binary alloys, DEFECT DIFF, 188-1, 2001, pp. 171-183
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Current Book Contents","Current Book Contents
ISSN journal
1012-0386
Volume
188-1
Year of publication
2001
Pages
171 - 183
Database
ISI
SICI code
1012-0386(2001)188-1:<171:DSIPIB>2.0.ZU;2-C
Abstract
This paper examines the microstructure and the strength behavior up to 1800 degreesC of Ir-V, -Ti, -Nb, -Ta, -Hf, and -Zr alloys which formed fee and Lit L1(2) two-phase coherent structures. It is indicated that the precipita tion-hardening effect depends on microstructure, resulting from differences in the lattice misfit. A maze structure such as in the Ir-Zr alloy was mor e effective for precipitation hardening than an orderly arrayed structure s uch as in the Ir-Nb alloy. The dislocation structure of deformed samples wa s investigated by TEM. The deformation mechanism of the alloys with differe nt microstructures was discussed.