A number of creep tests were performed on a Ni-base superalloy DS CM 247 specimens at three temperatures viz. 850, 950 and 1050 °C and over a range of stresses. Three-dimensional (3D) maps of creep curves (creep strain–time-stress) were generated by using the ‘in-house developed code’ based on θ-projection methodology. These 3D maps with overlaid experimental creep curves show a very good agreement with the predicted creep behaviour at different stresses and at a given temperature. Also, the ability of the method in deducing the stress relaxation curves at different strains derived from 3D maps of creep curves has been demonstrated. Further, the relative performance of the LMP approach and the θ-projection approach in prediction of time to rupture has been reported.

在三个温度下，在镍基高温合金DS CM 247样品上进行了许多蠕变测试。850、950和1050°C以及一定范围的应力。使用基于θ投影方法的“内部开发代码”生成了蠕变曲线（蠕变应变-时间应力）的三维（3D）映射。这些具有重叠实验蠕变曲线的3D地图显示了与在不同应力和给定温度下的预测蠕变行为非常吻合的结果。同样，已经证明了该方法在推导蠕变曲线的3D图得出的不同应变下的应力松弛曲线的能力。此外，已经报道了LMP方法和θ-投影方法在预测破裂时间方面的相对性能。