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Acta Metall Sin  1996, Vol. 32 Issue (8): 845-851    DOI:
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INITIATION OF HYDROGEN PRESSURE BUBBLES IN STEEL PD_3
HUANG Yizhong; HUANG Changhe;WANG Yanbin; CHU Wuyang (University of Science and Technology Beijing; Beijing 100083); MEI Dongsheng;CHENG Xingde;SU Shihuai; YU Mengwen(Company of Iron and Steel of Panzhihua; Panzhihua617067)(Manuscript received 1995-07-25; in revised form 1996-04-16)
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HUANG Yizhong; HUANG Changhe;WANG Yanbin; CHU Wuyang (University of Science and Technology Beijing; Beijing 100083); MEI Dongsheng;CHENG Xingde;SU Shihuai; YU Mengwen(Company of Iron and Steel of Panzhihua; Panzhihua617067)(Manuscript received 1995-07-25; in revised form 1996-04-16). INITIATION OF HYDROGEN PRESSURE BUBBLES IN STEEL PD_3. Acta Metall Sin, 1996, 32(8): 845-851.

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Abstract  The initiating process of the hydrogen bubbles and microcracks caused by the hydrogen pressure was observed by TEM. The results showed that hydrogen charging can generate bubbles and then cause a great reduce of the cohesive strength. As soon as the hydrogen pressure within the bubble reaches to the cohesive strength decreased by hydrogen,microcrack will initiate at the wall of the bubbles. Correspondent: HUANG Yizhong,( Department of Materials Physics, University of Scicnce and Technology Beijing, Beijing 100083)
Key words:  steel PD_3      hydrogen bubble      hydrogen pressure microcrack     
Received:  18 August 1996     
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