| Healing of hydrogen-attacked cracks in split specimens with recovering heat treatment in vacuum |
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| 引用本文： | JingXu ChaofangDong XiaogangLi. Healing of hydrogen-attacked cracks in split specimens with recovering heat treatment in vacuum[J]. 北京科技大学学报(英文版), 2004, 11(3): 245-250 |
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| 作者姓名： | JingXu ChaofangDong XiaogangLi |
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| 作者单位： | [1]DepartmentofMaterialPhysics,UniversityofScienceandTechnologyBeijing,Beijing100083,China [2]StateKeyLaboratoryofCorrosionandProtection,Shenyang110016,China |
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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： | The healing mechanism of hydrogen-attacked cracks in low carbon steel and Cr-Mo steel and its influencing factors during the healing process were studied by recovering heat treatment of split specimens in vacuum. The result showed that crack pacing turns much smaller under the condition of pure heating, especially for crack tips. The healing effect is well related to the length of cracks with the shorter in priority. By the primary mechanism of thermal diffusion, iron and carbon atoms must diffuse at the high speed in steel to realize that plasticity deformation energy exceeds and overcomes surface tensile force energy. In addition, phase transformation and stress-stain relationship also have positive effects on the process.
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| 关 键 词： | 氢腐蚀 裂缝 修复 热处理 真空 |
Healing of hydrogen-attacked cracks in split specimens with recovering heat treatment in vacuum |
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| Jing Xu,Chaofang Dong,Xiaogang LI. Healing of hydrogen-attacked cracks in split specimens with recovering heat treatment in vacuum[J]. Journal of University of Science and Technology Beijing, 2004, 11(3): 245-250 |
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| Authors: | Jing Xu Chaofang Dong Xiaogang LI |
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| Abstract: | The healing mechanism of hydrogen-attacked cracks in low carbon steel and Cr-Mo steel and its influencing factors during the healing process were studied by recovering heat treatment of split specimens in vacuum. The result showed that crack pacing tums much smaller under the condition of pure heating, especially for crack tips. The healing effect is well related to the length of cracks with the shorter in priority. By the primary mechanism of thermal diffusion, iron and carbon atoms must diffuse at the high speed in steel to realize that plasticity deformation energy exceeds and overcomes surface tensile force energy. In addition, phase transformation and stress-stain relationship also have positive effects on the process. |
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| Keywords: | hydrogen-attack crack healing heat treatment |
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