Fatigue Properties of Ni-Base Superalloy in Long Life Region at Elevated Temperature.

Bibliographic Information

Other Title
  • Ni基超合金の長寿命域における中高温疲労特性
  • Niキ チョウゴウキン ノ チョウジュミョウイキ ニ オケル チュウコウオン ヒロウ トクセイ

Search this article

Abstract

The fatigue properties of a nickel-base superalloy, Inconel 718, in long-life region up to 108 cycles were investigated under rotating bending at room temperature and elevated temperature of 300°C, 500°C and 600°C. S-N curves at 500°C and 600°C showed the stepwise shapes, though those in cases of room temperature and 300°C were the conventional one-step ones. All the fractures originated from the specimen surface at room temperature and 300°C, while the internal fractures occurred in long-life region beyond 107 cycles and the surface fractures at the stress levels over the horizontal line of S-N curves corresponding to the fatigue limit for the surface fracture at 500°C and 600°C. Intergranular crackings were observed at the origin of internal fracture.

Journal

Citations (3)*help

See more

References(17)*help

See more

Details 詳細情報について

Report a problem

Back to top