Partitioning behavior of Platinum Group Metals into γ and γ′ Phases of Ni-base Superalloys

DOI Web Site Web Site 17 Citations 21 References
  • Yokokawa Tadaharu
    High Temperature Materials Group, Materials Engineering Laboratory, National Institute for Materials Science
  • Osawa Makoto
    High Temperature Materials Group, Materials Engineering Laboratory, National Institute for Materials Science
  • Nishida Kenji
    Surface Analysis Group, Analysis Station, National Institute for Materials Science
  • Koizumi Yutaka
    High Temperature Materials Group, Materials Engineering Laboratory, National Institute for Materials Science
  • Kobayashi Toshiharu
    High Temperature Materials Group, Materials Engineering Laboratory, National Institute for Materials Science
  • Harada Hiroshi
    High Temperature Materials Group, Materials Engineering Laboratory, National Institute for Materials Science

Bibliographic Information

Other Title
  • Ni基超合金中の白金族元素のγ⁄γ′相分配
  • Ni基超合金中の白金族元素のγ/γ'相分配
  • Niキ チョウゴウキン チュウ ノ ハッキンゾク ゲンソ ノ ガンマ ガンマ ソウ ブンパイ
  • Partitioning behavior of Platinum Group Metals into γ and γ′ Phases of Ni-base Superalloys

Search this article

Abstract

The partitioning behavior of platinum group metals (PGM) into γ matrix and γ′ precipitates for γ′ precipitation hardening Ni-base superalloys has been investigated using electron probe X-ray micro-analyzer (EPMA). The TMS-75 (Ni-12 mass%Co-3 mass%Cr-2 mass%Mo-6 mass%W-6 mass%Al-6 mass%Ta-5 mass%Re-0.1 mass%Hf) and five alloys with 1 at%PGM additions to TMS-75 were investigated. It became clear that in equilibrium state at 1100°C, Ir is slightly partitioned more into γ′ precipitates, Ru has a preference to partition into γ matrix, in contrast Rh, Pd and Pt are partitioned into γ′ precipitates, and the partitioning ratio of these elements is about Kiγ⁄γ′≈1⁄2. Furthermore, it appears that the partitioning behavior of refractory elements, such as W, Re, are not so changed by PGM addition, for example, Re is partitioned into γ matrix in any alloy (KReγ⁄γ′ is in range of 6 to 7.5).

Journal

Citations (17)*help

See more

References(21)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top