Enhancement of ductility in Fe-Co based alloys by substitution of Pd

M. Matsuda, R. Sago, K. Akamine, S. Tsurekawa, K. Takashima, M. Nishida

研究成果: ジャーナルへの寄稿記事

4 引用 (Scopus)

抄録

We investigated the relationship between the microstructure and mechanical properties of the ternary Co50Fe50-xPdx alloys with different Pd content. Co50Fe45Pd5, Co50Fe40Pd10 and Co50Fe35Pd15 alloys annealed at 873 K were composed of the α'-matrix having a B2 structure with a high degree of order and two kinds of Fe-Co-Pd precipitates with L10 and L12 structures, which formed at the grain boundaries and in the grain interior. The 0.2% proof stress, tensile strength, hardness and elongation were increased by substituting Pd for Fe in Co-Fe-Pd alloy. It is noteworthy that the Co50Fe40Pd10 alloy had a high tensile strength of 1293 MPa and high total elongation of 12% on average. The significant improvement in the ductility of the Co50Fe40Pd10 alloy is attributed to the ductile Fe-Co-Pd phase that precipitates at the grain boundaries and in the α′-grain interior. The ductile precipitates suppressed the intergranular and cleavage fracture. The increase in strength of Co50Fe50-xPdx alloys is likely to come from both the precipitation hardening and the grain refinement of the α′-matrix.

元の言語英語
ページ(範囲)124-131
ページ数8
ジャーナルJournal of Alloys and Compounds
682
DOI
出版物ステータス出版済み - 10 15 2016

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Ductility
Substitution reactions
Precipitates
Elongation
Grain boundaries
Tensile strength
Age hardening
Grain refinement
Hardness
Mechanical properties
Microstructure

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

これを引用

Enhancement of ductility in Fe-Co based alloys by substitution of Pd. / Matsuda, M.; Sago, R.; Akamine, K.; Tsurekawa, S.; Takashima, K.; Nishida, M.

:: Journal of Alloys and Compounds, 巻 682, 15.10.2016, p. 124-131.

研究成果: ジャーナルへの寄稿記事

Matsuda, M. ; Sago, R. ; Akamine, K. ; Tsurekawa, S. ; Takashima, K. ; Nishida, M. / Enhancement of ductility in Fe-Co based alloys by substitution of Pd. :: Journal of Alloys and Compounds. 2016 ; 巻 682. pp. 124-131.
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AU - Matsuda, M.

AU - Sago, R.

AU - Akamine, K.

AU - Tsurekawa, S.

AU - Takashima, K.

AU - Nishida, M.

PY - 2016/10/15

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AB - We investigated the relationship between the microstructure and mechanical properties of the ternary Co50Fe50-xPdx alloys with different Pd content. Co50Fe45Pd5, Co50Fe40Pd10 and Co50Fe35Pd15 alloys annealed at 873 K were composed of the α'-matrix having a B2 structure with a high degree of order and two kinds of Fe-Co-Pd precipitates with L10 and L12 structures, which formed at the grain boundaries and in the grain interior. The 0.2% proof stress, tensile strength, hardness and elongation were increased by substituting Pd for Fe in Co-Fe-Pd alloy. It is noteworthy that the Co50Fe40Pd10 alloy had a high tensile strength of 1293 MPa and high total elongation of 12% on average. The significant improvement in the ductility of the Co50Fe40Pd10 alloy is attributed to the ductile Fe-Co-Pd phase that precipitates at the grain boundaries and in the α′-grain interior. The ductile precipitates suppressed the intergranular and cleavage fracture. The increase in strength of Co50Fe50-xPdx alloys is likely to come from both the precipitation hardening and the grain refinement of the α′-matrix.

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