合金化钼铌单晶高温双轴蠕变性能研究

• 作 者: 张华锋 郑剑平 杨启法
• 出 处: 中国原子能科学研究院年报
• 发表日期: 2004年期
• 关键词: 蠕变性能 蠕变应变 高温 实验样品 周向应力 蠕变实验 真空设备 蠕变速率 测径仪 蠕变曲线

本工作利用内压法开展合金化Mo-Nb单晶材料高温双轴蠕变性能研究。实验样品如图1所示,具体结构参数:外径9mm,壁厚0.7mm,长90mm。使实验样品在1600℃时获得5、10和15MPa3种周向应力。利用图2所示的高温高真空设备进行蠕变实验。在每个实验时间间隔后利用图3所示的高精度激光测径仪测量外径获得蠕变应变。根据不同时间的蠕变应变分析得出蠕变曲线和稳态蠕变速率。样品内惰性气体压力如表1所列。

In this work, the high temperature biaxial creep properties of alloying Mo-Nb single crystal materials were investigated by the internal pressure method. Experimental sample shown in Figure 1, the specific structural parameters: diameter 9mm, wall thickness 0.7mm, length 90mm. The experimental samples were obtained at 1600 ℃ 5,10 and 15MPa3 kinds of circumferential stress. Creep experiments were performed using the high temperature and high vacuum equipment shown in Figure 2. The creep strain was obtained by measuring the outer diameter with a high-precision laser caliper as shown in Figure 3 after each experimental interval. Creep curves and steady-state creep rates are obtained from creep strain analysis at different times. The inert gas pressure in the sample is listed in Table 1.