Abstract

The creep deformation behavior of a novel precipitate-hardened Ni-Fe-base superalloy in solutionized and aged states is investigated at 750 °C/80 to 120 MPa. We found that as creep deformation proceeds, creep curves of specimens in the two states either overlap or are parallel to each other. This study provides a new strategy to design the heat treatment scheme to achieve a good compromise between the strength and fabricability of superalloys for 700 °C-class advanced ultra-supercritical power plants.

中文翻译：

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新型沉淀硬化的镍铁基高温合金在750°C时的蠕变变形行为

摘要

在750°C / 80至120 MPa下研究了新型的固溶和时效状态的沉淀硬化Ni-Fe基高温合金的蠕变变形行为。我们发现随着蠕变变形的进行，两种状态下的试样蠕变曲线要么重叠要么彼此平行。这项研究为设计热处理方案提供了一种新策略，以在700°C级高级超超临界发电厂的高温合金的强度和可加工性之间取得良好的平衡。