| 氢及缺口状态对40CrNiMo钢断裂强度的影响 |
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| 引用本文： | 崔教林 Hardi.,D. 氢及缺口状态对40CrNiMo钢断裂强度的影响[J]. 腐蚀与防护, 1997, 18(5): 13-15 |
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| 作者姓名： | 崔教林 Hardi. D |
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| 作者单位： | 宁波高等专科学校，英国纽卡索大学 315000 |
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| 摘 要： | 通过对４０ＣｒＮｉＭｏ光滑与三种不同缺口状态的试样进行试验发现，氢对材料强度的影响与外加应变速率的大小有关。在空气中试验，缺口状态对材料断裂强度几乎无影响；而在氢气中试验，则发现缺口根部半径Ｒ的变化对材料断裂强度影响极大；当缺口根部半径一定，仅改变外径Ｄ或缺口处最小直径ｄ所得两种缺口状态对缺口强度的影响不大。
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| 关 键 词： | 氢 断裂强度 缺口状态 CrNiMo合金钢 腐蚀 |
EFFECT OF HYDROGEN AND DIFFERENT NOTCH CONTOURS ON THE FRACTURE STRENGTH OF 40CrNiMo STEEL |
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| Cui Jiaolin D. Hardie. EFFECT OF HYDROGEN AND DIFFERENT NOTCH CONTOURS ON THE FRACTURE STRENGTH OF 40CrNiMo STEEL[J]. Corrosion & Protection, 1997, 18(5): 13-15 |
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| Authors: | Cui Jiaolin D. Hardie |
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| Abstract: | The study on smooth and three different notch contour specimens of 40CrNiMo found that the effect of hydrogen related closely to the strain rate applied. Different notch contours have very little effect on the fracture strength of the material when tested in air. Great difference, however, occurs with root radius R at notch varying when tested in 1 bar hydrogen. Moreover, when outsider diameter D or minimum diameter at the root of notch d vary with root radius R at notch keeping constant, two different notch contours obtained have very little influence on the fracture strength of the material. |
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| Keywords: | Notch contour Hydrogen Stress concentration factor Fracture strength |
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