Effects of carbon addition on the microstructure and mechanical properties of Ir85Nb15 two-phase refractory superalloy

Y. F. Gu; Y. Yamabe-Mitarai; H. Harada

doi:10.1016/S0921-5093(02)00128-4

Effects of carbon addition on the microstructure and mechanical properties of Ir₈₅Nb₁₅ two-phase refractory superalloy

Y. F. Gu, Y. Yamabe-Mitarai, H. Harada

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

1 Citation (Scopus)

Abstract

To provide information relevant to Ir-base two-phase alloys for future ultra-high-temperature applications, effects of carbon addition on the structure development and mechanical properties of a two-phase Ir₈₅Nb₁₅ alloy were investigated. The results show that carbide formation is not necessary for stabilising the grains in the two-phase Ir₈₅Nb₁₅ alloy at temperatures up to 1800 °C. At temperatures up to 1200 °C, the yield strength of the carbon-doped Ir₈₅Nb₁₅ alloys was higher than that of the carbon-free alloy. The carbon addition to the Ir₈₅Nb₁₅ alloy changed the fracture mode from intergranular to transgranular cleavage.

Original language	English
Pages (from-to)	216-219
Number of pages	4
Journal	Materials Science and Engineering A
Volume	339
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-5093(02)00128-4
Publication status	Published - 2003 Jan 2
Externally published	Yes

Keywords

Carbon addition
IrNb
Refractory superalloy

ASJC Scopus subject areas

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

Access to Document

10.1016/S0921-5093(02)00128-4

Cite this

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abstract = "To provide information relevant to Ir-base two-phase alloys for future ultra-high-temperature applications, effects of carbon addition on the structure development and mechanical properties of a two-phase Ir85Nb15 alloy were investigated. The results show that carbide formation is not necessary for stabilising the grains in the two-phase Ir85Nb15 alloy at temperatures up to 1800 °C. At temperatures up to 1200 °C, the yield strength of the carbon-doped Ir85Nb15 alloys was higher than that of the carbon-free alloy. The carbon addition to the Ir85Nb15 alloy changed the fracture mode from intergranular to transgranular cleavage.",

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AB - To provide information relevant to Ir-base two-phase alloys for future ultra-high-temperature applications, effects of carbon addition on the structure development and mechanical properties of a two-phase Ir85Nb15 alloy were investigated. The results show that carbide formation is not necessary for stabilising the grains in the two-phase Ir85Nb15 alloy at temperatures up to 1800 °C. At temperatures up to 1200 °C, the yield strength of the carbon-doped Ir85Nb15 alloys was higher than that of the carbon-free alloy. The carbon addition to the Ir85Nb15 alloy changed the fracture mode from intergranular to transgranular cleavage.

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