论文部分内容阅读
采用高压釜渗氢、拉伸试验机进行氢化物应力再取向、金相显微镜和图像处理观察测量氢化物取向因子等方法,研究了环向应力和热循环次数对N36锆合金管材氢化物应力再取向的影响,获得了氢化物应力再取向分布规律。结果表明,F_N~(40°)随应力和热循环次数的增加而增大,最后趋于稳定,并且整个试样壁厚截面上的(F_N~(40°))均未超过0.5。在200~400℃上进行1个热循环周次时,氢化物应力再取向的应力阈值在80~95 MPa。
Hydride stress reorientation was carried out in an autoclave with hydrogen permeation and tensile testing machine, metallographic microscope and image processing to measure hydride orientation factor. The effects of hoop stress and thermal cycles on the hydride stress of N36 zirconium alloy tube Orientation, the hydride stress reorientation distribution was obtained. The results show that F_N ~ (40 °) increases with the increase of stress and thermal cycles and finally stabilizes, and the average value of (F_N ~ (40 °)) does not exceed 0.5 in the whole specimen wall thickness. The stress threshold of hydride stress reorientation is between 80 and 95 MPa for one thermal cycle at 200-400 ° C.