Within the aerospace sector, the understanding and prediction of creep strains for materials used in high-temperature applications, such as Nickel-based super alloys, is imperative. Small punch testing offers the potential for understanding creep behavior using much less material than conventional uniaxial testing but in contrast to uniaxial creep tests, the stress in small punch creep (SPC) tests is multiaxial. SPC testing can be a valuable tool for validating models of creep deformation, but the key to unlocking its full capability is through the accurate correlation of the creep material properties measured through both techniques. As such, the focus of this paper is to correlate the creep behavior of Waspaloy obtained through conventional uniaxial testing to that obtained via small punch creep testing. Recently, and for low chrome steels, this has been achieved through use of the k_sp method, but there are good reasons for believing this technique will not work so well for Nickel-based super alloys. This paper shows this to be the case for Waspaloy and proposes some alternative methods of correlation based on combining the Monkman–Grant relation and the Wilshire equations for both uniaxial and small punch creep. It was found that this latter approach enabled the accurate conversion of SPC minimum displacement rates to equivalent uniaxial minimum creep rates which, when combined with the Wilshire equations, enabled SPC test loads to be converted into equivalent uniaxial stresses (and visa versa) with levels of accuracy that were significantly reduced when compared to using the k_sp method. Further, the random error associated with these conversions were dramatically increased.

在航空航天领域，了解和预测用于高温应用的材料（如镍基超级合金）的蠕变应变势在必行。小冲头测试提供了理解蠕变行为的潜力，比传统的单轴测试使用更少的材料，但与单轴蠕变测试相比，小冲头蠕变 (SPC) 测试中的应力是多轴的。SPC 测试可以成为验证蠕变变形模型的宝贵工具，但解锁其全部功能的关键是通过两种技术测量的蠕变材料特性的准确关联。因此，本文的重点是通过关联常规单轴试验获得与所获得Waspaloy合金的蠕变行为经由小冲头蠕变测试。最近，对于低铬钢，这是通过使用k _sp方法实现的，但有充分的理由相信这种技术对于镍基超级合金不会那么好用。本文表明 Waspaloy 就是这种情况，并基于结合 Monkman-Grant 关系和用于单轴和小冲头蠕变的 Wilshire 方程提出了一些替代的相关方法。发现后一种方法能够将 SPC 最小位移速率准确转换为等效的单轴最小蠕变速率，当结合 Wilshire 方程时，能够将 SPC 测试载荷转换为等效的单轴应力（反之亦然）) 与使用k _sp方法相比，准确度水平显着降低。此外，与这些转换相关的随机误差显着增加。