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采用正电子湮没技术结合透射电镜，考察了Ｔｉ含量对一种Ｆｅ－Ｎｉ－Ｃｏ基合金的微观结构及氢脆敏感性的影响结果表明：改变合金的Ｔｉ含量，会使合金中第二相的尺寸、数量、分布及种类发生变化，合金的强度、塑性及氢脆敏感性均随之发生改变；大尺寸的γ′颗粒及η相与基体间的界面是一种较强的缺陷，可以促进氢的局部聚并，从而导致合金氢脆敏感性的升高研究表明，合金的氢脆敏感性与合金强度之间并不存在必然的联系，而是取决于合金的微观结构，即随着合金中利于氢原子局部聚并的缺陷浓度的升高而增大
The positron annihilation technique and transmission electron microscopy were used to investigate the effect of Ti content on the microstructure and hydrogen embrittlement susceptibility of a Fe-Ni-Co based alloy. The results show that changing the Ti content of the alloy will cause the second phase The size, number, distribution and type of the alloy change, the strength, ductility and hydrogen embrittlement sensitivity of the alloy change with it. The large size γ ’particles and the interface between the η phase and the matrix is a strong defect that can promote Hydrogen local aggregation, resulting in increased susceptibility to hydrogen embrittlement alloy research shows that the alloy hydrogen embrittlement sensitivity and alloy strength is not necessarily related, but depends on the microstructure of the alloy, that is, with the alloy In favor of the local concentration of hydrogen atoms defects increased concentration increases