The impression creep test (ICT) method, as a miniature specimen test technique, has been used extensively to determine the in-service creep properties of power plant components. However, the experiment results of the ICT can be affected by some uncertainties associated with the inaccuracies of measurement, which have not been studied before. This paper presents some results of finite element analyses, to evaluate the effect of indenter misalignment on the results of the ICT, such as the steady-state creep deformation rate and the conversion parameters. The results obtained have shown that the angular misalignments of the indenter around horizontal directions have a relatively significant influence on the conversion parameters, and the misalignment around vertical direction has a much less significant effect. Empirical formulas were developed for the possible correction of the conversion factors. Finally, some recommendations on the control of the indenter and specimen alignment were given.

压痕蠕变测试（ICT）方法作为一种微型样本测试技术，已被广泛用于确定电厂部件的在役蠕变特性。但是，ICT的实验结果可能会受到一些与测量不准确相关的不确定性的影响，而这些不确定性是以前从未研究过的。本文介绍了有限元分析的一些结果，以评估压头未对准对ICT结果的影响，例如稳态蠕变变形率和转换参数。所得结果表明，压头在水平方向上的角度失准对转换参数的影响相对较大，而在垂直方向上的失准效果则差得多。为转换系数的可能校正开发了经验公式。最后，对压头控制和标本对准提出了一些建议。