摘要
用ＷＯＬ恒位移试样研究了Ｂ_２结构的Ｆｅ_３Ａｌ和Ｆｅ_３Ａｌ＋Ｃｒ的应力腐蚀和氢致开裂．结果表明，水中应力腐蚀的门槛值和裂纹扩展速率均高于动态充氢时的相应值加Ｃｒ能提高Ｆｅ_３Ａｌ的Ｋ_（ＩＣ），Ｋ_（ＩＳＣＣ）和Ｋ_（ＩＨ）．氢致开裂断口随Ｋ_Ｉ下降由解理向沿晶转变，水中应力腐蚀则全是解理断口，这与Ｋ_（ＩＳＣＣ）较高有关．
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)
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第2期A085-A090,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金
关键词
应力腐蚀
氢致开裂
金属互化物
stress corrosion cracking,hygrogen induced cracking,ordered alloy Fe_3Al
