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用透射电镜观察了Inconel718及其改型合金中的时效析出组织调整Nb,Ti,Al的含量及比例,可以得到与通常合金中γ′和γ″单独析出有所不同的γ′和γ″的复合组织及包覆组织两类析出形态、其中γ″在γ′上析出的包覆组织具有较好的高温长期时效组织稳定性过时效试验结果表明.改型合金不同于Inconel718合金γ″致δ的相转变,却以强化相溶解而使材料软化
The content and proportion of Nb, Ti and Al in the precipitated microstructure of Inconel 718 and its modified alloys were observed by transmission electron microscopy to obtain γ ’and γ’ ’different from those of γ’ and γ ’’ The results of over-aging test showed that the modified alloy is different from the alloy γ "induced by Inconel718 alloy Of the phase transition, but to strengthen the phase dissolution material softening