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研究了碳、硼离子注入对Ti-6Al-4V合金应力控制疲劳行为的影响。研究发现:注入C~+和B~+可分别使合金的疲劳极限提高28％和12％。高能C~+和B~+离子辐射,使合金的注入表面受到极度损伤并且在注入层中形成了许多细小的第二相沉淀粒子。使用透射电镜(TEM)和二次离子质谱(SIMS)研究了疲劳前后注入表面的结构变化。根据表面层微观分析的结果,分析疲劳寿命得到改善的原因。
The effects of carbon and boron ion implantation on the stress-controlled fatigue behavior of Ti-6Al-4V alloy were investigated. The results show that the fatigue limit of the alloy can be increased by 28% and 12% respectively by injecting C ~ + and B ~ +. High energy C ~ + and B ~ + ion radiation, the alloy injection surface is extremely damaged and formed in the injection layer of many small second phase precipitated particles. Transmission electron microscopy (TEM) and secondary ion mass spectrometry (SIMS) were used to investigate the structural changes on the implanted surface before and after fatigue. According to the results of surface layer microanalysis, the reason why the fatigue life is improved is analyzed.