| 应力与氢对40Cr钢断裂特征的影响 |
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| 引用本文： | 徐坚,钟曼英. 应力与氢对40Cr钢断裂特征的影响[J]. 中国计量学院学报, 1992, 0(2) |
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| 作者姓名： | 徐坚 钟曼英 |
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| 作者单位： | 中国计量学院机械量计量系，中国计量学院机械量计量系 |
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| 摘 要： | 本文利用悬臂梁试验机,测定了40Cr 钢的断裂韧性 K_(1c)和在3.5%NaCl溶液中,充氢达饱和条件下的氢脆临界应力场强度因子 K_(IH),以及在不同的应力场强度因子 K_(Ii)下的裂纹扩展速率 da/dt,并结合 SEM 对断裂形态进行了分析。
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| 关 键 词： | 40Cr 钢 断裂韧性 K_(IC) 应力强度因子 K_ |
The Effect of the Stress and Hydrogen on the Failure Characteristics of 40Cr Steel |
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| Xu Jian Zhong Manying. The Effect of the Stress and Hydrogen on the Failure Characteristics of 40Cr Steel[J]. Journal of China Jiliang University, 1992, 0(2) |
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| Authors: | Xu Jian Zhong Manying |
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| Affiliation: | Dept.of Mechanical and Dimesional Measurement |
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| Abstract: | ——The effect of the stress and hydrogen on the fracture toughness behavior of 40Cr steel in 3.5% NaCl aqueous solution is investigated.Results show that the hydrogen decreases the critical stress intensity factor of hydrogen embrittlement and increases the propagation rate of crack (da/dt).The results of SEM fractography analysis show that with the K_1 increases from K_(IH) to K_(IHC) the fracture pattern from the intergranular turn quasi—cleavage and to dimple cooresponding step Ⅰ,step Ⅱ and step Ⅲ of(da/dt). |
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| Keywords: | 40Cr steel Fracture toughness K_(1C) Stress intengity factor K_(Ii) |
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