Ductility enhancement by boron addition in Co-Al-W high-temperature alloys

Kazuya Shinagawa; Toshihiro Omori; Katsunari Oikawa; Ryosuke Kainuma; Kiyohito Ishida

doi:10.1016/j.scriptamat.2009.05.037

Ductility enhancement by boron addition in Co-Al-W high-temperature alloys

Kazuya Shinagawa, Toshihiro Omori, Katsunari Oikawa, Ryosuke Kainuma, Kiyohito Ishida

ENG - Metallurgy

Tohoku University

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

152 Citations (Scopus)

Abstract

The mechanical properties of several B-free and B-doped Co-Al-W superalloys with different volume fractions of the Co₃(Al,W)-γ′ phase were examined by mechanical tests at various temperatures up to 980 °C. Although grain boundary fracture occurred in the B-free alloys, the addition of a small amount of B drastically improved the ductility. It was also confirmed that the positive temperature dependence of strength was strongly affected not only by the volume fraction of the γ′ phase, but also by the addition of B.

Original language	English
Pages (from-to)	612-615
Number of pages	4
Journal	Scripta Materialia
Volume	61
Issue number	6
DOIs	https://doi.org/10.1016/j.scriptamat.2009.05.037
Publication status	Published - 2009 Sept

Keywords

Co-based superalloys
Compression test
Grain boundary cohesion
Intermetallic compounds
Tension test

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10.1016/j.scriptamat.2009.05.037

Cite this

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title = "Ductility enhancement by boron addition in Co-Al-W high-temperature alloys",

abstract = "The mechanical properties of several B-free and B-doped Co-Al-W superalloys with different volume fractions of the Co3(Al,W)-γ′ phase were examined by mechanical tests at various temperatures up to 980 °C. Although grain boundary fracture occurred in the B-free alloys, the addition of a small amount of B drastically improved the ductility. It was also confirmed that the positive temperature dependence of strength was strongly affected not only by the volume fraction of the γ′ phase, but also by the addition of B.",

keywords = "Co-based superalloys, Compression test, Grain boundary cohesion, Intermetallic compounds, Tension test",

author = "Kazuya Shinagawa and Toshihiro Omori and Katsunari Oikawa and Ryosuke Kainuma and Kiyohito Ishida",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of the Science, CREST, the Japan Science and Technology Agency and Global COE Project.",

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T1 - Ductility enhancement by boron addition in Co-Al-W high-temperature alloys

AU - Shinagawa, Kazuya

AU - Omori, Toshihiro

AU - Oikawa, Katsunari

AU - Kainuma, Ryosuke

AU - Ishida, Kiyohito

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of the Science, CREST, the Japan Science and Technology Agency and Global COE Project.

PY - 2009/9

Y1 - 2009/9

N2 - The mechanical properties of several B-free and B-doped Co-Al-W superalloys with different volume fractions of the Co3(Al,W)-γ′ phase were examined by mechanical tests at various temperatures up to 980 °C. Although grain boundary fracture occurred in the B-free alloys, the addition of a small amount of B drastically improved the ductility. It was also confirmed that the positive temperature dependence of strength was strongly affected not only by the volume fraction of the γ′ phase, but also by the addition of B.

AB - The mechanical properties of several B-free and B-doped Co-Al-W superalloys with different volume fractions of the Co3(Al,W)-γ′ phase were examined by mechanical tests at various temperatures up to 980 °C. Although grain boundary fracture occurred in the B-free alloys, the addition of a small amount of B drastically improved the ductility. It was also confirmed that the positive temperature dependence of strength was strongly affected not only by the volume fraction of the γ′ phase, but also by the addition of B.

KW - Co-based superalloys

KW - Compression test

KW - Grain boundary cohesion

KW - Intermetallic compounds

KW - Tension test

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DO - 10.1016/j.scriptamat.2009.05.037

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SP - 612

EP - 615

JO - Scripta Materialia

JF - Scripta Materialia

IS - 6

ER -

Ductility enhancement by boron addition in Co-Al-W high-temperature alloys

Abstract

Keywords

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