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首页> 外文会议>12th International Conference on Environmental Degradation of Materials in Nuclear Power Systems: Water Reactors 2005 vol.2 >VERIFICATION OF AN INTRASPECIMEN METHOD USING A CONSTANT STRESS TEST OF SENSITIZED ALLOY 600
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VERIFICATION OF AN INTRASPECIMEN METHOD USING A CONSTANT STRESS TEST OF SENSITIZED ALLOY 600

机译：使用敏化合金600的恒定应力测试验证内标法

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A proof-of-principle experiment for the intraspecimen method conducted in earlier work using four-point bending tests yielded positive results. However, the power-to-area ratio in a Weibull model was expected to be unity but the measured value was 0.63. Therefore, a more detailed study was conducted to investigate the effect of intraspecimen area using uniaxial tension tests. Two heats of Alloy 600, of which the grain sizes were 310 and 145 μm, respectively, were used after sensitization. The test solution was 0.1 M sodium tetrathionate (Na_2S_4O_6·2H_2O). The measured power-to-area ratio varied from 0.5 to 1.0. In order to identify the grain boundary characteristics at the crack initiation sites, an EBSD (Electron Back Scattered Diffraction) examination was conducted after the test. It is postulated that the difference in high angle boundary population between specimens with different grain sizes may be responsible for the observed discrepancy in the measured power-to-area ratio.
机译：在较早的工作中使用四点弯曲试验进行的标本内方法的原理验证实验产生了积极的结果。但是，Weibull模型中的功率面积比预计为1，但测量值为0.63。因此，进行了更详细的研究，以使用单轴拉伸试验研究标本内区域的影响。敏化后，使用两次加热的合金600，其晶粒尺寸分别为310和145μm。测试溶液为0.1 M四硫酸钠（Na_2S_4O_6·2H_2O）。测得的功率/面积比在0.5到1.0之间变化。为了确定裂纹萌生部位的晶界特征，在测试后进行了EBSD（电子背散射衍射）检查。据推测，具有不同晶粒尺寸的试样之间的高角度边界人口的差异可能是所观测到的功率/面积比差异的原因。

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