论文部分内容阅读
本文通过测量ＣＯ３Ｔｉ、Ｎｉ３Ａｌ、Ｆｅ３Ａｌ、ＴｉＡｌ四种金属间化合物在氧气、氢气中在２×１０－４／ｓ形变速率下的拉伸性能，研究了其在氢气中的室温环境脆性．研究结果表明，上述四种金属间化合物在Ｈ２中的脆化程度（用氢脆因子ＩＨ２＝［（δＯ２－δＨ２）／δＯ２］×１００％表示）是不同的，其大小依次为Ｃｏ３Ｔｉ＞Ｆｅ３Ａｌ>ＴｉＡｌ.其脆化程度的差异用金属间化合物中基体金属对氢气的催化裂解作用的强弱进行了很好的解释．
In this paper, the tensile properties of four intermetallic compounds of CO3Ti, Ni3Al, Fe3Al and TiAl in oxygen and hydrogen at 2 × 10-4 / s deformation rate were measured and the room temperature environment brittleness in hydrogen was studied. The results show that the degree of embrittlement of the above four intermetallic compounds in H2 (expressed by the hydrogen embrittlement factor IH2 = [(δO2-δH2) / δO2] × 100%) is different and its order of magnitude is Co3Ti> Fe3Al> The difference of embrittlement degree of TiAl is well explained by the strength of catalytic cracking of hydrogen by matrix metal in intermetallic compound.