Work hardening behaviour of the IN-617 alloy under tensile loading was studied in the solution treated, aged, and cold worked conditions at room temperature (RT) and 700 °C. Double logarithmic plots of the true stress and logarithmic plastic strain of this alloy displayed upward concave shape similar to those of other austenitic superalloys. Five different relationships between the true stress and logarithmic plastic strain were analyzed to characterize the flow behaviour of this alloy. The relationship proposed by Ludwigson was found to have best fit with the experimental data. Three stages of the instantaneous work hardening rate (θ) were observed in the solution treated and the aged conditions whereas only stage I was exhibited in the cold worked condition of the alloy. Transmission electron microscopy (TEM) revealed traces of slip bands in the samples tested at RT and micro twins as well their interaction with dislocations and precipitation of new carbides was observed in the samples tested at 700 °C. There was typical ductile fracture with dimples in both the solution treated and aged conditions whereas there was faceted fracture in the cold worked condition both at RT and 700 °C.

在室温（RT）和700°C的固溶处理，时效和冷加工条件下研究了IN-617合金在拉伸载荷下的加工硬化行为。该合金的真实应力和对数塑性应变的双对数图显示出向上凹的形状，类似于其他奥氏体高温合金。分析了真实应力与对数塑性应变之间的五个不同关系，以表征该合金的流动行为。发现路德维希森提出的关系最适合实验数据。瞬时加工硬化率的三个阶段（θ在固溶处理和时效条件下观察到），而在合金的冷加工条件下仅显示I期。透射电子显微镜（TEM）揭示了在RT和微型孪晶处测试的样品中的滑带痕迹，以及在700°C下测试的样品中观察到它们与位错的相互作用以及新碳化物的沉淀。在固溶处理和时效条件下均存在典型的带有凹痕的延性断裂，而在室温和700°C的冷加工条件下均出现多面断裂。