Abstract

A novel nickel-based single crystal superalloy with low density had been designed and the creep deformation mechanisms of the experiment alloy under two conditions (1050 °C/200 MPa and 1100 °C/137 MPa) had been systematically discussed. The topological inversion had been observed after fracture under the above two conditions. The effects of temperature and stress on creep life of the experiment alloy had been found no significant difference under the two conditions. It was indicated that the small decrease in temperature exerted limited influence on the creep behaviors of single crystal superalloys in the range of high temperature.

Graphic Abstract

中文翻译：

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低密度镍基单晶高温合金的蠕变特性

摘要

设计了一种新型的低密度镍基单晶高温合金，并对实验合金在两种条件（1050°C / 200 MPa和1100°C / 137 MPa）下的蠕变变形机理进行了系统的探讨。在上述两个条件下，断裂后都观察到了拓扑反转。在两种条件下，温度和应力对实验合金蠕变寿命的影响均无明显差异。结果表明，在高温范围内，温度的小幅下降对单晶高温合金的蠕变行为产生了有限的影响。

图形摘要