| 纳米压痕试验测量不确定度评定 |
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| 作者单位： | 上海材料研究所 上海200437 |
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| 摘 要： | 影响纳米压痕试验结果的因素很多,导致分别计算A类和B类不确定度十分困难。该文采取实验室间比对的方法,通过对熔融石英样品进行纳米压痕试验,得出压痕硬度和压痕模量的重复性限r和复现性限R。在r和R的基础上推导出纳米压痕硬度和模量扩展不确定度的近似计算公式,从而大大简化了纳米压痕试验测量不确定度的评定。不确定度评定结果表明纳米压痕试验测量不确定度较大;试验次数超过5次后,其对扩展不确定度的影响不大。
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| 关 键 词： | 重复性限 复现性限 纳米压痕 不确定度评定 |
Evaluation of Uncertainty in Nanoindentation Testing Measurement |
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| Authors: | WANG Bin WANG Chun-liang YANG Li SHA Fei |
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| Abstract: | It is difficult in experience to calculate type A and type B of uncertainty respectively due to many factors acting on the test results of nanoindentation.The Round Robin Test of interlaboratories on the nanoindentation test of fused silicon samples were adopted and repeatability limit(r) and the reproducibility limit(R) of the indentation hardness and the indentation modulus were obtained in this paper.Then the approximate formula of expanded uncertainty of nano indentation hardness and the modulus were derived.The formula largely simplifies evaluation of uncertainty in nanoindentation testing measurement.the result of which indicates uncertainty in nanoindentation testing measurement is still high and the influence of test frequency on expanded uncertainty is trivial when test frequency is more than Five times. |
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| Keywords: | Repeatability Reproducibility Nanoindentation Evaluation of uncertainty |
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