Saturated solid-solution hardening behavior of Ir-Hf-Nb refractory superalloys for ultra-high temperature applications

J. B. Sha; Y. Yamabe-Mitarai

doi:10.1016/j.scriptamat.2005.08.038

Saturated solid-solution hardening behavior of Ir-Hf-Nb refractory superalloys for ultra-high temperature applications

J. B. Sha, Y. Yamabe-Mitarai

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

15 Citations (Scopus)

Abstract

The principles of multi-component alloying and saturated solid-solution hardening were combined for the design and development of Ir-based alloys for ultra-high temperature applications. It is found that as a solute, the transition metal Hf combined with Nb exerts its full potential for solid-solution hardening on the solvent Ir at room temperature and higher. With a monolithic saturated face-centered cubic structure, the Ir-3Hf-5Nb alloy has a 0.2% yield strength of as high as 140 MPa even at 1950°C.

Original language	English
Pages (from-to)	115-119
Number of pages	5
Journal	Scripta Materialia
Volume	54
Issue number	1
DOIs	https://doi.org/10.1016/j.scriptamat.2005.08.038
Publication status	Published - 2006 Jan 1
Externally published	Yes

Keywords

Compression test
High-temperature strength
Iridium alloys
Solid-solution hardening

ASJC Scopus subject areas

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

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abstract = "The principles of multi-component alloying and saturated solid-solution hardening were combined for the design and development of Ir-based alloys for ultra-high temperature applications. It is found that as a solute, the transition metal Hf combined with Nb exerts its full potential for solid-solution hardening on the solvent Ir at room temperature and higher. With a monolithic saturated face-centered cubic structure, the Ir-3Hf-5Nb alloy has a 0.2% yield strength of as high as 140 MPa even at 1950°C.",

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N2 - The principles of multi-component alloying and saturated solid-solution hardening were combined for the design and development of Ir-based alloys for ultra-high temperature applications. It is found that as a solute, the transition metal Hf combined with Nb exerts its full potential for solid-solution hardening on the solvent Ir at room temperature and higher. With a monolithic saturated face-centered cubic structure, the Ir-3Hf-5Nb alloy has a 0.2% yield strength of as high as 140 MPa even at 1950°C.

AB - The principles of multi-component alloying and saturated solid-solution hardening were combined for the design and development of Ir-based alloys for ultra-high temperature applications. It is found that as a solute, the transition metal Hf combined with Nb exerts its full potential for solid-solution hardening on the solvent Ir at room temperature and higher. With a monolithic saturated face-centered cubic structure, the Ir-3Hf-5Nb alloy has a 0.2% yield strength of as high as 140 MPa even at 1950°C.

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KW - Solid-solution hardening

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