Small punch testing was carried out on Copper-Chromium-Zirconium alloy subjected to two heat treatment conditions –both quenched and one subjected to subsequent aging. The variation in the load-displacement characteristics associated with the testing was attributed to differences in plastic and damage properties evolved as a consequence of these two varying heat treatments. The influence of these properties varied in different regimes of the load-displacement curve. In this work the elastic and plastic properties derived from uniaxial tensile tests performed on materials subjected to these two heat treatment conditions were used to simulate the initial stages of the load-displacement curve. Using an inverse finite element method, the parameters relevant to a Gurson-Tvergaard-Needleman based damage model which influence the later stages of the load-displacement curve were estimated. The variations in the damage model's parameters with respect to heat treatment conditions were correlated with fractographic observations. A formulation for compliance correction of small punch testing rig using finite element model incorporating elastic and plastic properties has also been discussed.

对经受两种热处理条件的铜-铬-锆合金进行了小冲头测试 - 一种是淬火，一种是随后进行时效。与测试相关的载荷-位移特性的变化归因于塑料和损坏特性的差异，这是这两种不同热处理的结果。这些特性的影响在载荷-位移曲线的不同状态下有所不同。在这项工作中，对经受这两种热处理条件的材料进行的单轴拉伸试验得出的弹性和塑性特性被用来模拟载荷-位移曲线的初始阶段。使用逆有限元方法，估计了与基于 Gurson-Tvergaard-Needleman 的损伤模型相关的参数，这些模型会影响载荷-位移曲线的后期阶段。损伤模型参数相对于热处理条件的变化与断层观察相关。还讨论了使用结合弹性和塑性特性的有限元模型对小型冲头试验台进行柔度校正的公式。