Although blades with a deviation angle of less than 15° between the blade stacking axis and the [001] orientation are qualified in the industry, the creep life of samples near [001] orientation exhibits significant anisotropy at intermediate temperatures. Those crystals having orientations within 15° from precise [001] exhibited significantly longer lives when their orientations were closer to the [001]-[101] boundary of the stereographic triangle than to the [001]-[111] boundary. Here, we first investigated the orientation rotation path of specimens near [001] orientation during creep at 750 °C/750 MPa, then revealed the dominant slip systems at different creep stages. Subsequently, we evaluated the effect of orientation deviation from precise [001] on creep properties. Finally, our research revealed the orientation sensitive mechanism of creep life in near [001] oriented Ni-based single crystal superalloys at intermediates.

中文翻译：

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揭示中间温度下近[001]取向镍基单晶高温合金蠕变寿命的取向敏感性


尽管叶片堆叠轴与[001]取向之间的偏差角小于15°的叶片在工业上是合格的，但接近[001]取向的样品的蠕变寿命在中间温度下表现出显着的各向异性。当那些取向与精确[001]相差15°以内的晶体，当它们的取向更接近立体三角形的[001]-[101]边界而不是[001]-[111]边界时，它们表现出明显更长的寿命。在这里，我们首先研究了在 750 °C/750 MPa 蠕变过程中接近 [001] 取向的试样的取向旋转路径，然后揭示了不同蠕变阶段的主要滑移系统。随后，我们评估了精确 [001] 的取向偏差对蠕变性能的影响。最后，我们的研究揭示了中间体近[001]取向镍基单晶高温合金蠕变寿命的取向敏感机制。