TY - JOUR
T1 - Effect of carbon content on hydrogen occlusivity and embrittlement of ferrite–pearlite steels
AU - Chan, S. L.I.
AU - Charles, J. A.
N1 - Funding Information:
The financial support of one of the authors (SLIC) by Shell Research Ltd is gratefully acknowledged. Thanks are also due to Professor R. W. K. Honeycombe and Professor D. Hull of the University of Cambridge for providing research facilities. Helpful discussions with Dr M. Martinez-Madrid, Professor A. W. Thompson, and Dr J. J. Lewandowski. are very much appreciated.
PY - 1986/9/1
Y1 - 1986/9/1
N2 - Experiments on a series of pure Fe–C alloys consisting of ferrite and pearlite only have shown that the ferrite/pearlite and pearlite/pearlite interfaces are effective hydrogen trapping sites. The ferrite/cementite interfaces within the pearlite colonies, however, have little effect on the hydrogen occlusivity. With an increase in carbon content, more ferrite/pearlite interfaces are created and these increase the hydrogen occlusivity. Although the ferrite/cementite lamella interface has little effect on the hydrogen occlusivity, it does appear that the lamellae interfere with the hydrogen diffusion path across the pearlite colonies. Thus, the higher-carbon alloys in the pearlitic condition have a lower apparent hydrogen diffusivity. Hydrogen has little effect on the tensile strength, but significantly reduces the ductility. After hydrogen charging, high-carbon alloys suffer a lower ductility loss. However, in terms of absolute values, the low-carbon specimens are always more ductile than the high-carbon alloys when saturated with hydrogen.
AB - Experiments on a series of pure Fe–C alloys consisting of ferrite and pearlite only have shown that the ferrite/pearlite and pearlite/pearlite interfaces are effective hydrogen trapping sites. The ferrite/cementite interfaces within the pearlite colonies, however, have little effect on the hydrogen occlusivity. With an increase in carbon content, more ferrite/pearlite interfaces are created and these increase the hydrogen occlusivity. Although the ferrite/cementite lamella interface has little effect on the hydrogen occlusivity, it does appear that the lamellae interfere with the hydrogen diffusion path across the pearlite colonies. Thus, the higher-carbon alloys in the pearlitic condition have a lower apparent hydrogen diffusivity. Hydrogen has little effect on the tensile strength, but significantly reduces the ductility. After hydrogen charging, high-carbon alloys suffer a lower ductility loss. However, in terms of absolute values, the low-carbon specimens are always more ductile than the high-carbon alloys when saturated with hydrogen.
UR - http://www.scopus.com/inward/record.url?scp=84975015261&partnerID=8YFLogxK
U2 - 10.1179/mst.1986.2.9.956
DO - 10.1179/mst.1986.2.9.956
M3 - 期刊論文
AN - SCOPUS:84975015261
SN - 0267-0836
VL - 2
SP - 956
EP - 962
JO - Materials Science and Technology
JF - Materials Science and Technology
IS - 9
ER -