Fatigue Characteristics of New Zirconium-Based Alloys Under Low Cycle Loading
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摘要: 采用薄壁管材试样,对φ9.50.57mm规格的2种新型锆合金管材进行了5个应变水平下的低周疲劳实验,且对其中的两个应变水平做了统计分析。对实验数据处理后,得到了管材的Δεt-N关系曲线和疲劳拟合曲线方程。并对管材在不同应变水平的低周疲劳断口做了金相和SEM分析,讨论了新型锆合金薄壁管材的低周疲劳断裂机理。Abstract: Fatigue crack of materials induces very large calamity because of its abruptness. According to literature researches, fatigue destroy hold 80~90% in all of mechanical invalidation. In this paper, we adopt three kinds of φ 9.50.57mm thin-wall tube samples, and finish low cycle fatigue test at 5 kinds of strain levels. We get the relationships of Δεt-N and fatigue imitation function. Furthermore, the fatigue crack microstructure is analyzed and the mechanism of fatigue is discussed.
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Key words:
- Fatigue /
- Zirconium-based alloy /
- Low cycle loading
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