Ｎｉ-Ｃｒ-Ｗ超合金の異常高温クリープ曲線の離散コサイン変換による方程式化について

抄録

The creep curves of superalloys as conventional high temperature materials consist of three regions which are transient creep, steady state creep and accelerating creep. However, unlike this, it was reported that anomalous strengthening phenomena appeared in the creep of the superalloy in high temperature and low stress regions, and creep curves repeating unique unevenness were drawn. Although no single equation representing such anomalous creep curves has been found so far, we succeeded in expressing the above-mentioned anomalous creep curves with single equation using discrete cosine transform. Therefore we report the above in this paper.