| Effect of hydrogen attack on acoustic emission behavior of low carbon steel |
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| 作者姓名： | XiaogangLi ChaofangDong |
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| 作者单位： | [1]MaterialsscienceandEngineeringSchool,universityofScienceandTechnologyBeijing,Beijing,100083,China [2]MaterialsscienceandEngineeringSchool,universityofScienceandTechnologyBeijing,Beijin |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划) |
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| 摘 要： | In order to investigate the effect of hydrogen attack degree on acoustic emission(AE) behavior of low carbon steel during tensiling,specimens made of low carbon steel was exposed to hydrogen gas of 18 MPa at 450 and 500℃ for 240,480 and 720h respectively,Experimental results show that with increase of the hydrogen attack degree,the totally AE activity decreases during tensiling.In addition,the count of AE signals with high amplitude for the specimens with hydrogen attack keeps a constant which is less than that without hydrogen attack.It is concluded that AE signals orginate in the specimens with hydrogen attack from intergranular fracture induced by methane blisterings or/and microcracks on grain boundaries.
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| 关 键 词： | 低碳钢 氢脆 声发射 |
Effect of hydrogen attack on acoustic emission behavior of low carbon steel |
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| Xiaogang LI,Chaofang Dong,Ming Li,Hua Chen.Effect of hydrogen attack on acoustic emission behavior of low carbon steel[J].Journal of University of Science and Technology Beijing,2002,9(2):130-134. |
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| Authors: | Xiaogang LI Chaofang Dong Ming Li Hua Chen |
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| Abstract: | In order to investigate the effect of hydrogen attack degree on acoustic emission (AE) behavior of low carbon steel during tensiling, specimens made of low carbon steel was exposed to hydrogen gas of 18 MPa at 450 and 500℃ for 240, 480 and 720 h respectively. Experimental results show that with increase of the hydrogen attack degree, the totally AE activity decreases during tensiling. In addition, the count of AE signals with high amplitude for the specimens with hydrogen attack keeps a constant which is less than that without hydrogen attack. It is concluded that AE signals originate in the specimens with hydrogen attack from intergranular fracture induced by methane blisterings or/and microcracks on grain boundaries. |
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| Keywords: | low carbon steel hydrogen attack acoustic emission |
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