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HYDROGEN ACCUMULATION ON INCLUSIONS,GRAIN BOUNDARY AND NEAR NOTCH TIP |
YU Guanghua;CHENG Yihuan; CHEN Lian; QIAO Lijie; CHU Wuyang 1)( University of Science and Technology;Beijing; Beijing 110083)2)( Institute of Iorn and Steel; Corporation of Iorn and Steel Baoshan; Shanghai 201900)3) (Institute of Metal Research;Chinese Academy of Sciences; Liaoning Key Laberatory Materials and Hydrogen; Shenyang 110015)(Manuscript received 1994-07-28;in revised form 1995-01-16) |
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Cite this article:
YU Guanghua;CHENG Yihuan; CHEN Lian; QIAO Lijie; CHU Wuyang 1)( University of Science and Technology;Beijing; Beijing 110083)2)( Institute of Iorn and Steel; Corporation of Iorn and Steel Baoshan; Shanghai 201900)3) (Institute of Metal Research;Chinese Academy of Sciences; Liaoning Key Laberatory Materials and Hydrogen; Shenyang 110015)(Manuscript received 1994-07-28;in revised form 1995-01-16). HYDROGEN ACCUMULATION ON INCLUSIONS,GRAIN BOUNDARY AND NEAR NOTCH TIP. Acta Metall Sin, 1995, 31(10): 455-460.
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Abstract Hydrogen accumulation on inclusions, grain boundary and near a loaded notch tip in 28CrMoTiB steel was measured using ion microprobe mass analyzer. The results showed that accumulation of hydrogen on inclusions of TiN, Al2O3, TiO, MnS and compound oxide was 10─20, 8─14, 10, 10─17 and 13─14, respectively. The accumulation of hydrogen on surface of the specimen and the grain boundary was 1.2 and 7.3, respectively.There were two peaks of hydrogen accumulation ahead of a loaded notch tip and correspounding accumulation were 2.5 to 4.5. On grain boundary,there was no segregation for B,P and C,however,positive segregation for Ti,Cr,Mo and O,and negative segregation for Mn and S.Correspondent: YU Guanghua,Department of Materials Physics,University of Science and Technology Beijing, Beijing 100083
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Received: 18 October 1995
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