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首页> 外文期刊>Journal of Materials Engineering and Performance >The effect of Zr on the low-cycle fatigue behavior of NiAl at 1000K
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The effect of Zr on the low-cycle fatigue behavior of NiAl at 1000K

机译：Zr对NiAl在1000K时低周疲劳行为的影响。

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摘要

The effect of a 0.1 at. % alloying addition of Zr on the low-cycle fatigue behavior of polycrystalline NiAl was determined at 1000K and compared to that of binary NiAl. Samples of binary NiAl and the Zr-doped alloy were processed by either HIPconsolidation or extrusion of prealloyed intermetallic powders. The cyclic stress response, cyclic stress-strain behavior, and strain-life relationships were all significantly influenced by the microalloying addition of Zr, regardless of the processingtechnique. A detailed examination of the post4ested low-cycle fatigue (LCF) samples was conducted by optical and electron microscopy to determine variations in fracture and deformation modes and to characterize any microstructural changes that occurredduring LCF testing. Differences in LCF behavior due to the Zr addition are attributed to the strong effect that Zr has on modi~ing the deformation behavior of the intermetallic.
机译：0.1 at。的效果在1000K下确定Zr合金添加量对多晶NiAl的低周疲劳行为的百分比，并与二元NiAl进行比较。通过HIP固结或挤压预合金化金属间粉末对二元NiAl和Zr掺杂合金样品进行处理。 Zr的微合金化添加对循环应力响应，循环应力-应变行为以及应变寿命关系都产生了显着影响，而与加工技术无关。通过光学和电子显微镜对后期低周疲劳（LCF）样品进行了详细检查，以确定断裂和变形模式的变化并表征LCF测试期间发生的任何微观结构变化。由于Zr的添加，LCF行为的差异归因于Zr对改变金属间化合物的变形行为的强烈影响。

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