【作者】 杨万欢； 钟巍华； 宁广胜； 鱼滨涛； 古宏伟； 杨文；

【Author】 YANG Wan-huan;ZHONG Wei-hua;NING Guang-sheng;YU Bin-tao;GU Hong-wei;YANG Wen;Division of Reactor Engineering Technology Research, China Institute of Atomic Energy;

【机构】 中国原子能科学研究院反应堆工程技术研究部；

【摘要】 目前我国正在对退役重水研究堆的辐照孔道和工艺管材料(LT21)进行拉伸性能研究。由于退役部件的坯料为薄壁管,测试样品只能加工成纵向弧形试样,而无法使用常见的标准板状或棒状拉伸试样。为评估该样品测试数据的可靠性,本文针对未辐照LT21铝合金弧形样品的拉伸试验不确定度进行了分析。为便于与标样的测试不确定度进行对比,首先利用与LT21材质相似的6061Al,分析了板状试样的测试不确定度,并对比标样测试不确定度进行验证;接着开展6061Al纵向弧形与板状样品测试数据相对偏差的分析,进一步得到纵向弧形样品的测量不确定度,最终结合LT21测试数据合成得到了LT21纵向弧形试样测量不确定度的综合评定结果。研究结果表明,对于LT21纵向弧形试样,屈服强度(Rp0.2)、抗拉强度(Rm)和延伸率(A)的最终不确定度分别为±1.292%,±2.331%和±4.131%,测试不确定度均低于5%。更多还原

【Abstract】 At present, the tensile properties of irradiation channel and irradiation capsule tube material(LT21) for decommissioned heavy water research reactor are studied in China. Due to the thin-walled tube stock of the decommissioned components, the test samples can only be processed into longitudinal arc-shaped specimens rather than the standard plate or bar tensile specimens commonly used.In order to evaluate the reliability of the test data, the tensile test uncertainty of the unirradiated LT21 aluminum alloy arc sample was analyzed in this paper.In order to compare the test error with the standard sample, the 6061 Al material, which is similar to LT21 material, is used to analyze the test uncertainty of the plate sample and verify the test uncertainty by comparing with the standard sample.Then, the relative deviation analysis of 6061 Al longitudinal arc sample and plate sample test data was carried out to further synthesize the measurement uncertainty of longitudinal arc sample, and finally the comprehensive evaluation results of LT21 longitudinal arc sample measurement error were obtained.The results show that the final uncertainties of yield strength(Rp0.2), tensile strength(Rm) and elongation(A) are ±1.292%, ±2.331% and ±4.131%,respectively, for the LT21 longitudinal arc specimen, and the test error is less than 5%.更多还原