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STRESS CORROSION CRACKING AND HYDROGEN INDUCED CRACKING OF ORDERED B_2-TYPE Fe_3Al |
LIN Junpin;CHU Wuyang;XIAO Jimei(University of Science and Technology Beijing) |
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Cite this article:
LIN Junpin;CHU Wuyang;XIAO Jimei(University of Science and Technology Beijing). STRESS CORROSION CRACKING AND HYDROGEN INDUCED CRACKING OF ORDERED B_2-TYPE Fe_3Al. Acta Metall Sin, 1994, 30(2): 85-90.
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Abstract The behaviour of stress corrosion cracking (SCC) and hydrogen induced cracking (HIC) of ordered alloys Fe3Al and Fe3Al+Cr were investigated with WOL specimens. The threshold value KISCC and da/ dt value of SCC in water were higher than that of HIC. The addition of Cr in Fe3Al may increase the KIC, KISCC and KIH. The transition from hydrogen induced cleavage cracking to hydrogen induced intergranular cracking occurred with the decrease of KI and the fracture surfaces of SCC were cleavage, this is due to the higher KISCC. The theoretical explanation of above mentioned experimental results was discussed.LIN Junpin, associate professor,(Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083)
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Received: 18 February 1994
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