核级银铟镉合金稳态蠕变速率测量不确定度评定  

Evaluation of uncertainty in steady creep rate measurement of nuclear grade Ag-In-Cd alloy

作　　者：房永强 余泽利 张曙香 贾梦琳 刘泽晨 王柯 郑铱 FANG Yong-qiang;YU Ze-li;ZHANG Shu-xiang;JIA Meng-lin;LIU Ze-chen;WANG Ke;ZHENG Yi(Measurement Center,Xi′an Hantang Analysis and Testing Co.,Ltd.,Xi′an 710003,China)

机构地区：[1]西安汉唐分析检测有限公司计量中心,陕西西安710003

出　　处：《塑性工程学报》2023年第9期211-216,共6页Journal of Plasticity Engineering

基　　金：陕西省创新能力支撑计划项目(2021PT-024)。

摘　　要：对核级银铟镉合金稳态蠕变速率进行了测定,建立了不确定度数学模型,分析了来源,评定了不确定度,重点研究了力值和温度对压缩蠕变变形的影响。结果表明:银铟镉合金稳态蠕变速率不确定度主要来源于L_(1)和L_(2)中试验机力值示值误差、同轴度偏差以及温控系统示值误差和稳定性,L_(1)和L_(2)不确定度分量中有关光栅尺的不确定度分量及L_(0)和t_(i)中各因素对不确定度的贡献非常小,可忽略不计。银铟镉合金稳态蠕变速率为v_(i)=(0.00812±0.00240)%·h^(-1),k=2,换算成相对扩展不确定度为U_(rel)=29.6%,k=2,相对扩展不确定度很大,当测试结果接近产品标准要求极值时,须充分考虑不确定度。The steady creep rate of nuclear grade Ag-In-Cd alloy was measured,the mathematical model of uncertainty was established,the source was analyzed,the uncertainty was evaluated,and the influence of force value and temperature on the compression creep deformation was emphatically studied.The results show that the uncertainty of steady creep rate of Ag-In-Cd alloy mainly comes from the error of force value indication,coaxiality deviation of testing machine and the error and stability of temperature control system in L_(1) and L_(2).The uncertainty components of grating ruler in L_(1)and L_(2)uncertainty components and the factors in L_(0) and ti contribute very little to the uncertainty,which can be ignored.Steady state creep rate of Ag-In-Cd alloy is as follow v_(i)=(0.00812±0.00240)%·h^(-1),k=2,which is converted into the relative expanded uncertainty of U_(rel)=29.6%,k=2,and the relative expanded uncertainty is very large.When the test result is close to the extreme value required by the product standard,the uncertainty must be fully considered.

关 键 词：银铟镉合金 压缩蠕变 稳态蠕变速率 不确定度测量 

分 类 号：TB934[一般工业技术—计量学]