轧制态Ni-5at%W合金的再结晶织构演变

Evolution of Recrystallized Textures of Cold Rolled Ni-5at%W Alloy

以轧制态Ni-5at%W(Ni5W)合金带材为研究对象,对其在不同温度下进行退火处理,分析不同温度退火带材的硬度,采用光学显微镜观察其组织,利用EBSD评估再结晶织构,研究了退火温度对再结晶织构的影响。结果表明:Ni5W合金带材的再结晶温度在700℃附近;随着退火温度的升高,硬度减小,晶粒长大,在1200℃以上易发生二次再结晶;随着退火温度的升高,立方织构含量增大,在1200℃达到最大值,立方织构含量达99%以上;当退火温度进一步升高,发生二次再结晶,立方织构含量有所降低。

The cold rolled Ni-5at%W(Ni5W) strip was annealed at different temperatures. The hardness of the annealed strip at different temperatures was analyzed and the microstructure was investigated by optical microscopy. The recrystallized textures were evaluated by EBSD. The effects of annealed temperature on the recrystallized texture were discussed. The results show that the recrystallized temperature of the Ni5W alloy strip is around 700 ℃. As the annealing temperature increases, the hardness decreases and the grain grows. Secondary recrystallization is prone to occur above 1200 ℃. With the annealing temperature increasing, the cubic texture content increases, reaching a maximum at 1200 ℃ and over 99%. When the annealing temperature increases furtherly, secondary recrystalallization occurs, the cubic texture content reduces.