STRESS CORROSION CRACKING AND HYDROGEN INDUCED CRACKING OF ORDERED B_2－TYPE Fe_3Al

Acta Metall Sin

1994, Vol. 30

Issue (2): 85-90 DOI:

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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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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)

Key words: stress corrosion cracking hygrogen induced cracking ordered alloy Fe_3Al

Received: 18 February 1994

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1994/V30/I2/85

1LiuCT,McKameyCG,LeeEH．ScrMetall,1990;24:2852LiuCT,LeeEH,MckameyCG．ScrMetall,1989;23:8753ZhangDZ,SheDL,HsiaoCM．ScrMetallMater,1992;27:3034LinJP,ChuWY,ZhangDZ,HsiaoCM．ScrMetallMater,1992;27:12955褚武扬,肖纪美．金属学报,1992;28:A676ChuWY．HsiaoCM．MetallTrans,1984;15A:20877褚武扬．氢损伤与氢致滞后断裂．北京:冶金工业出版社,19888KamedaJ．ActaMetall,1986;34:867

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