Effect of Aluminide Coating on Creep Properties of Ni-Base Single Crystal Superalloys

DOI Web Site Web Site 15 Citations 20 References
  • Sato Akihiro
    High Temperature Materials Center, National Institute for Materials Science Ishikawajima-Harima Heavy Industries Co., Ltd.
  • Aoki Yasuhiro
    Ishikawajima-Harima Heavy Industries Co., Ltd.
  • Arai Mikiya
    Ishikawajima-Harima Heavy Industries Co., Ltd.
  • Harada Hiroshi
    High Temperature Materials Center, National Institute for Materials Science

Bibliographic Information

Other Title
  • Ｎｉ基単結晶超合金のクリープ寿命に及ぼすアルミ拡散コーティングの影響
  • Niキ タンケッショウ チョウゴウキン ノ クリープ ジュミョウ ニ オヨボス アルミ カクサン コーティング ノ エイキョウ

Search this article

Abstract

  This article compares the creep rupture responses of aluminide coated samples with uncoated ones to elucidate the effect of diffusion layers on resistance against creep. Three Ni-base single crystal superalloys, CMSX-4, TMS-75 and TMS-138, were chosen for present study. Creep specimens had thicknesses ranged from 1 mm to 4 mm to simulate the varying dimensions across the actual turbine blade. Creep conditions were set at 1060°C-137 MPa and 1100°C-137 MPa. Experimental results indicated that the creep-rupture lives of coated specimens were shorter than those of the bare samples. In particular, the coated TMS-138 specimen with 1 mm thickness had an 86% reduction in creep rupture life. Microstructural observations on coated samples indicated the formation of diffusion zones beneath the coating; a creep life model was then developed to taken account the reduction in load bearing cross sectional area. In conclusions, the creep-rupture lives predicted by the model have shown good agreement with the experimental values.<br>

Journal

Citations (15)*help

See more

References(20)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top