Microstructural changes on high temperature treatment of a cold-worked and nitrided Fe–1%V alloy
Microstructural changes on high temperature treatment of a cold-worked and nitrided Fe–1%V alloy
复制标题
冷加工氮化 Fe-1%V 合金高温处理的显微组织变化
DOI：
10.1023/a:1004382025283
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发表时间：
1998
影响因子：
4.5
通讯作者：
O. E. Atasoy
中科院分区：
文献类型：
--
作者：
A. Ozdemir;O. E. Atasoy
采用Fe-1.06%V合金研究了在冷加工和氮化后的铁素体基体中细小VN析出物对再结晶的控制。氮化在475°C下在氨气氛中进行。随后的高温退火工艺在氢气中分别进行795、820、860和880°C。再结晶数据表明，再结晶动力学服从Avrami型方程，其时间指数与温度无关。透射电子显微镜技术被用来测量沉淀物的尺寸和研究的微观结构的变化。再结晶的激活能评估被认为是一致的，管理VN颗粒粗化。从这些研究结果可以得出结论，再结晶的开始是由界面反应控制的VN纵梁在亚晶界的生长。当长条消失后，细小析出物与亚晶界的相互作用被最小化，再结晶开始。© 1998年查普曼和霍尔
An Fe–1.06%V alloy was used to study the control of recrystallization through fine VN precipitates in cold-worked and nitrided ferritic matrix. Nitriding was carried out at 475°C in ammonia atmosphere. Subsequent high temperature annealing process was performed in hydrogen gas for 795, 820, 860 and 880°C, respectively. The data on recrystallization indicates that kinetics of recrystallization obeys an Avrami type equation with a temperature independent time exponent. Transmission electron microscopy techniques were used to measure the precipitate sizes and to study the changes in the microstructure. The activation energy evaluated for recrystallization was found to be consistent with that governing the VN particle coarsening. From these findings it was concluded that the initiation of recrystallization is dominated by the interface reaction controlled growth of VN stringers at subgrain boundaries. After the disappearance of stringers, the interaction of fine precipitates with subgrain boundaries is minimized and hence recrystallization starts. © 1998 Chapman & Hall