Acta Metall Sin  1998, Vol. 34 Issue (2): 134-140    DOI:

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HYDROGEN-FACILITAED DISLOCATION EMISSION,MOTION AND INITIATION OF HYDROGEN-INDUCED MICROCRACK IN RAIL STEEL

HUANG Yizhong;WANG Yanbin;CHU Wugang (Department of Materials Physics; University of Science and Technology Beijing; Beijing 100083)MEI DongSheng;SU Shihuai;YU Mengwen;JI Kebing (Company of Iron and Steel of Panzhihua; Panzhihua 617067)

HUANG Yizhong;WANG Yanbin;CHU Wugang (Department of Materials Physics; University of Science and Technology Beijing; Beijing 100083)MEI DongSheng;SU Shihuai;YU Mengwen;JI Kebing (Company of Iron and Steel of Panzhihua; Panzhihua 617067). HYDROGEN-FACILITAED DISLOCATION EMISSION,MOTION AND INITIATION OF HYDROGEN-INDUCED MICROCRACK IN RAIL STEEL. Acta Metall Sin, 1998, 34(2): 134-140.

Abstract References Related Articles Recommended Metrics Download:  PDF(1844KB)  Export:  BibTeX | EndNote (RIS)       Abstract  A special deflection device for TEM has designed and used to study the dislocation configuration change before and after recharging hydrogen. The relations among hydrogenfated microcrack initiation, dislocation motion and dislocation free zone (DFZ) were also studied. The results showed that hydrogen can promote dislocation emission and motion. When the dislocation emission and motion develop to a critical condition, hydrogen-facilitated microcrack will initiate in DFZ or at the top of the ored. This process is similar to that during tensile testing in the air. Key words:  TEM      hydrogen induced crack      dislocation emission and motion      rail steel      Received:  18 February 1998      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1998/V34/I2/134 1褚武扬,肖纪美,李世琼,田中卓.金属学报,1981;17:10(Cho W Y, Hisao C M, Li S Q, Tian Z Z. Acta Metall Sin 1981; 17: 10) 2Chu W Y,Hisao C M, Li Z J.Scr Metall,1979;;13:1063 3Chu W Y,Wang H L,Hisao C M.Corrosion,1982;38:561 4 Chu W Y, Wng H L, Hisao C M. Corrosion, 1984; 40: 487 5Rrobertson I M, Birnbaum H K. Acta Metall 1986; 34: 353 6 Bond G,Robertson I M, Birnbaum H K. Acta Metall 1988; 36: 2191-2289 7Pozenakp ,Robertson I M, Birnbaum H K. 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