Effect of precipitate morphology on strength of Ir-Nb alloys with two-phase coherent structures

Y. Yamabe-Mitarai; Yuefeng Gu; Y. Ro; S. Nakazawa; T. Maruko; H. Harada

doi:10.1016/S1359-6462(99)00166-9

Effect of precipitate morphology on strength of Ir-Nb alloys with two-phase coherent structures

Y. Yamabe-Mitarai, Yuefeng Gu, Y. Ro, S. Nakazawa, T. Maruko, H. Harada

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

The precipitate morphology of Ir-Nb alloys is altered by heat treatment. When Cuboidal precipitates were localized in rows along the 〈001〉 cube directions, the strength was lower than that of samples with cuboidal precipitates distributed uniformly, because of large, wide fcc channels. When plate-like or needle-like fcc phases were formed in cuboidal L1₂ precipitates, there was no large difference in the strength from that of samples with uniformly distributed cuboidal precipitates. This shows that Ir-Nb alloys deform by the bypass mechanism.

Original language	English
Pages (from-to)	305-311
Number of pages	7
Journal	Scripta Materialia
Volume	41
Issue number	3
DOIs	https://doi.org/10.1016/S1359-6462(99)00166-9
Publication status	Published - 1999 Jul 9
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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AU - Yamabe-Mitarai, Y.

AU - Gu, Yuefeng

AU - Ro, Y.

AU - Nakazawa, S.

AU - Maruko, T.

AU - Harada, H.

PY - 1999/7/9

Y1 - 1999/7/9

N2 - The precipitate morphology of Ir-Nb alloys is altered by heat treatment. When Cuboidal precipitates were localized in rows along the 〈001〉 cube directions, the strength was lower than that of samples with cuboidal precipitates distributed uniformly, because of large, wide fcc channels. When plate-like or needle-like fcc phases were formed in cuboidal L12 precipitates, there was no large difference in the strength from that of samples with uniformly distributed cuboidal precipitates. This shows that Ir-Nb alloys deform by the bypass mechanism.

AB - The precipitate morphology of Ir-Nb alloys is altered by heat treatment. When Cuboidal precipitates were localized in rows along the 〈001〉 cube directions, the strength was lower than that of samples with cuboidal precipitates distributed uniformly, because of large, wide fcc channels. When plate-like or needle-like fcc phases were formed in cuboidal L12 precipitates, there was no large difference in the strength from that of samples with uniformly distributed cuboidal precipitates. This shows that Ir-Nb alloys deform by the bypass mechanism.

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