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| Initiating, growing and cracking of hydrogen blisters | |
| 引用本文： | REN Xuechong SHAN Guangbin CHU Wuyang SU Yanjing GAO Kewei QIAO Lijie JIANG Bo CHEN Gang CUI Yinhui. Initiating, growing and cracking of hydrogen blisters[J]. 科学通报(英文版), 2005, 50(17): 1962-1965. DOI: 10.1360/982004-581 |
| 作者姓名： | REN Xuechong SHAN Guangbin CHU Wuyang SU Yanjing GAO Kewei QIAO Lijie JIANG Bo CHEN Gang CUI Yinhui |
| 作者单位： | [1]Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China [2]Technology Center of Ma＇anshan Steel ＆ Iron Corporation, Ma＇anshan 432000, China |
| 摘 要： | The growing process of a hydrogen blister in a wheel steel was observed in situ with an optical microscope, and the fracture surfaces formed from broken blisters on a wheel steel and bulk metallic glass were investigated. The initiating, growing, cracking and breaking of hydrogen blisters are as follows. Supersaturated vacancies can increase greatly during charging and gather together into a vacancy cluster （small cavity）. Hydrogen atoms become hydrogen molecules in the vacancy cluster and hydrogen molecules can stabilize the vacancy cluster. The small cavity becomes the nucleus of hydrogen blister. The blister will grow with entering of vacancies and hydrogen atoms. With increasing hydrogen pressure, plastic deformation occurs first, the hydrogen blister near the surface extrudes, and then cracks initiate along the wall of the blister with further increasing hydrogen pressure. A cracked blister can grow further through propagating of cracks until it breaks. |
| 关 键 词： | 氢水泡 初始过程 生长过程 破裂过程 光学纤维 |
| 收稿时间： | 2005-03-03 |
| 修稿时间： | 2005-03-032005-06-17 |
Initiating, growing and cracking of hydrogen blisters |
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| Ren Xuechong,Shan Guangbin,Chu Wuyang,Su Yanjing,Gao Kewei,Qiao Lijie,Jiang Bo,Chen Gang,Cui Yinhui. Initiating, growing and cracking of hydrogen blisters[J]. Chinese science bulletin, 2005, 50(17): 1962-1965. DOI: 10.1360/982004-581 | |
| Authors: | Ren Xuechong Shan Guangbin Chu Wuyang Su Yanjing Gao Kewei Qiao Lijie Jiang Bo Chen Gang Cui Yinhui |
| Affiliation: | 1. Department of Materials Physics, University of Science and Technology Beijing, 100083, Beijing, China 2. Technology Center of Ma’anshan Steel & Iron Corporation, 432000, Ma’anshan, China |
| Abstract: | The growing process of a hydrogen blister in a wheel steel was observed in situ with an optical microscope, and the fracture surfaces formed from broken blisters on a wheel steel and bulk metallic glass were investigated. The initiating, growing, cracking and breaking of hydrogen blis-ters are as follows. Supersaturated vacancies can increase greatly during charging and gather together into a vacancy cluster (small cavity). Hydrogen atoms become hydrogen molecules in the vacancy cluster and hydrogen molecules can stabilize the vacancy cluster. The small cavity becomes the nucleus of hydrogen blister. The blister will grow with enter-ing of vacancies and hydrogen atoms. With increasing hy-drogen pressure, plastic deformation occurs first, the hydro-gen blister near the surface extrudes, and then cracks initiate along the wall of the blister with further increasing hydrogen pressure. A cracked blister can grow further through propa-gating of cracks until it breaks. |
| Keywords: | hydrogen blister initiating growing cracking breaking. |
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