Role of an intergranular phase in RuAl with substitutional additions
Journal Article
·
· Acta Materialia
- Max-Planck-Inst. fuer Eisenforschung, Duesseldorf (Germany)
The unusual room-temperature ductility of the binary RuAl (B2) phase is extended by the occurrence of an intergranular eutectic film in a manner seemingly akin to a compliant layer effect. The premise that the controlled deployment of such a film might extend the favorable mechanical properties of RuAl to ternary formulations was examined for substitutional additions of Ni, Co and Ti in RuAl. Whereas single-phase ternary formulations invariably resulted in a sharp loss of ductility, dual-phase alloys in the pseudo-binary series Ru{sub 50}Al{sub 50}-Co{sub 70}Al{sub 30} and Ru{sub 52}Al{sub 48}-Ru{sub 52}Ti{sub 48} were found to support significant plasticity, as determined by room-temperature compression tests, up to alloying additions of the order of 40 at.%. Alloys based on the series Ru{sub 50}Al{sub 50}-Ni{sub 65}Al{sub 35} however, exhibited limited ductility, commensurate with strong solution strengthening effects and only a partially developed intergranular film.
- OSTI ID:
- 524547
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 7 Vol. 45; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
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