2333 一方向凝固Ni基超合金の高温クリープ・疲労相互作用条件下でのき裂成長寿命則(S07-4 疲労き裂進展,S07 構造材料の疲労強度とき裂進展問題)

概要

論文の詳細を見る
The Ni base directionally solidified super-alloy has been developed as a gas turbine blade material for high electrical efficiency power plant. Since turbine blades are faced with the centrifugal stress from the high-speed rotation, it is used under the high temperature creep condition. On the other hand, it is used under periodical condition caused by combustion gas. Therefore, the Ni base directionally solidified super-alloys are operated under the condition of high temperature creep-fatigue interaction. In this paper, high temperature crack growth tests were conducted under the condition of creep-fatigue interaction for the Ni base directionally solidified super-alloy, CM247LC. Based on the non-equilibrium science, crack growth mechanisms were investigated by analyzing the effects of cycle dependent and time dependent mechanisms on the crack growth behaviors under the condition of creep-fatigue interaction. Furthermore, the law-of crack growth life under the conditions of creep-fatigue interaction was derived.
社団法人日本機械学会の論文
2007-09-07