| 含氢NZ2锆合金疲劳裂纹扩展行为 |
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| 引用本文： | 周 军,李中奎,张建军,朱梅生,王文生,田 锋,石明华,周 廉. 含氢NZ2锆合金疲劳裂纹扩展行为[J]. 稀有金属材料与工程, 2009, 38(10): 1797-1800 |
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| 作者姓名： | 周 军 李中奎 张建军 朱梅生 王文生 田 锋 石明华 周 廉 |
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| 作者单位： | 1. 西北工业大学,陕西,西安,710072;西北有色金属研究院,陕西,西安,710016
2. 西北有色金属研究院,陕西,西安,710016 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 利用板材标准M(T)试样研究了4种不同氢含量(0,200,450,730 (g/g) NZ2锆合金的疲劳裂纹扩展行为.发现不论含氢量的高低,裂纹稳态扩展区的裂纹扩展行为均符合Paris幂律关系,即 da/dN=C((K)n,但随着氢含量的增加,n值不断减小;含氢量增加导致NZ2合金塑性变形能力降低,疲劳裂纹扩展速率增加,尤其是氢含量较高时表现更为明显.
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| 关 键 词： | NZ2锆合金 疲劳裂纹扩展 氢化物 |
| 收稿时间： | 2009-03-15 |
Fatigue Crack Propagation Behavior of NZ2 Zirconium Alloy with Different Hydrogen Contents |
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| Zhou Jun,Li Zhongkui,Zhang Jianjun,Zhu Meisheng,Wang Wensheng,Tian Feng,Shi Minghua and Zhou Lian. Fatigue Crack Propagation Behavior of NZ2 Zirconium Alloy with Different Hydrogen Contents[J]. Rare Metal Materials and Engineering, 2009, 38(10): 1797-1800 |
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| Authors: | Zhou Jun Li Zhongkui Zhang Jianjun Zhu Meisheng Wang Wensheng Tian Feng Shi Minghua Zhou Lian |
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| Abstract: | Fatigue crack propagation behavior of an advanced Zr-Sn-Nb alloy NZ2 with different hydrogen contents (0, 200, 450, and 730 mg/g) was investigated by standard M(T) specimens. The results showed that stable crack propagation behavior obeyed the Paris Law, i.e. da/dN=C(DK)n, whether the hydrogen content is high or low. But the power exponent n of the Paris Law was decreased with the hydrogen content increasing; the increment of hydrogen content can decrease the ductility of NZ2 alloy and enhance the fatigue crack growth rate, especially when the specimens have higher hydrogen content. |
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| Keywords: | NZ2 zirconium alloy fatigue crack propagation hydride |
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