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研究了室温完全反向应力控制条件下块状非晶合金Zr_(41.25)Ti_(13.75)Ni_(10)Cu_(12.5)Be_(22.5)的低周疲劳行为,结果表明,完全非晶和含晶态相非晶合金均表现为循环稳定直至断裂,完全非晶合金的寿命远高于含晶态相非晶合金。通过试样断裂表面及外表面SEM观察,解释了应变稳定循环产生的机制,两种非晶合金的疲劳断口均可观察到裂纹的萌生、扩展及过载断裂区,含晶态相非晶中的晶态相没有起到阻碍裂纹扩展的作用,而是作为裂纹萌生点或疏松。
The low cycle fatigue behavior of Zr_ (41.25) Ti_ (13.75) Ni_ (10) Cu_ (12.5) Be_ (22.5) bulk amorphous alloys under full reverse stress control was studied. State amorphous alloy showed a cyclic stability until fracture, completely amorphous alloy life is much higher than the crystalline phase amorphous alloy. Through the SEM observation of the fracture surface and the outer surface of the specimen, the mechanism of the stable strain generation was explained, and the crack initiation, propagation and over-fracture regions were observed in the fatigue fracture of both amorphous alloys Crystalline phase does not play a role in hindering the crack growth, but as a crack initiation point or loose.