軸力および曲げ応力下での酸化物分散強化白金-10%ロジウム合金の高温疲労特性

抄録

In general, the platinum alloy is used in glass production lines, due to an excellent corrosion resistance to melted glass at high temperature. On the other hand, the development of high quality glass is needed, because of wide use of glass application in recent years. So, Oxide-Dispersion-Strengthened Platinum alloy is developed which had better fatigue properties than the conventional one. However, there are few researches about the fatigue properties in a practical environment with axial force and bending stress. Therefore, in order to clarify fatigue properties and fracture mechanism of Oxide-Dispersion-Strengthened Platinum-10% rhodium with dispersed zirconium oxide particles, bending fatigue test at 1400℃, fracture surface observation and internal cross-section observation were performed. As a result of the fatigue test, it was clarified that the tendency of fatigue life with axial force depends on the times to failure rather than number of cycles to failure. Also, it was clarified by fracture surface observation, fatigue fracture was mainly under the condition of axial force 0MPa, and the intergranular fracture due to creep was mainly under the condition of axial force 23.4MPa. Furthermore, it was clarified that both wedge type and round type fracture were generated by bending fatigue test under the condition of axial force 23.4MPa.