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应用宏观合金化方法,改变Co_3V的晶型,控制(Fe,Co,Ni)_3V合金的有序晶体结构,改善长程有序合金的延性。研究结果表明:合金的有序结构可通过调整电子浓度来控制,当电子浓度介于7.625与7.850之间,L1_2型立方有序结构γ′稳定的。拉伸试验结果指出:具有立方有序结构的合金无论在室温还是高温下都是延性的,延伸率能达到30%(800℃以下),呈韧窝型延性断裂。
The macroscopic alloying method was used to change the crystal structure of Co_3V and control the ordered crystal structure of (Fe, Co, Ni) _3V alloy to improve the ductility of long-range ordered alloy. The results show that the ordered structure of the alloy can be controlled by adjusting the electron concentration. When the electron concentration is between 7.625 and 7.850, the cubic structure of L1_2 type is stable. Tensile test results show that the alloy with cubic ordered structure is ductile both at room temperature and high temperature, and the elongation can reach 30% (below 800 ℃) with dimpled ductile fracture.