The demands associated with the production of advanced parts made of nickel-base superalloys are continuously increasing to meet the requirements of current environmental laws. The use of lightweight components in load-carrying aero-engine structures has the potential to significantly reduce fuel consumption and greenhouse gas emissions. Furthermore, the competitiveness of the aero-engine industry can benefit from reduced production costs and shorter development times while minimizing costly try-outs and increasing the efficiency of engines. The manufacturing process of aero-engine parts in superalloys at temperatures close to 950 °C produces reduced stamping force, residual stresses, and springback compared to traditional forming procedures occurring at room temperature. In this work, a hot forming procedure of a double-curved component in alloy 718 is studied. The mechanical properties of the material are determined between 20 and 1000 °C. The presence and nature of serrations in the stress–strain curves are assessed. The novel version of the anisotropic Barlat Yld2000-2D material model, which allows the input of thermo-mechanical data, is used in LS-DYNA to model the behaviour of the material at high temperatures. The effect of considering the stress-relaxation data on the predicted shape distortions is evaluated. The results show the importance of considering the thermo-mechanical anisotropic properties and stress-relaxation behaviour of the material to predict the final geometry of the component with high accuracy. The implementation of advanced material models in the finite element (FE) analyses, along with precise process conditions, is vital to produce lightweight components in advanced materials of interest to the aerospace industry.

为了满足当前环境法的要求，与生产由镍基高温合金制成的高级零件相关的需求正在不断增加。在承载式航空发动机结构中使用轻型部件具有显着降低燃料消耗和温室气体排放的潜力。此外，航空发动机行业的竞争力可以从降低的生产成本和较短的开发时间中受益，同时最大程度地减少昂贵的试验并提高发动机的效率。与在室温下进行的传统成型工艺相比，在接近950°C的温度下在高温合金中制造航空发动机零件的过程产生的冲压力，残余应力和回弹力降低。在这项工作中 研究了合金718中双弯曲部件的热成型过程。材料的机械性能在20至1000°C之间确定。评估了应力-应变曲线中锯齿的存在和性质。LS-DYNA使用各向异性版本的各向异性Barlat Yld2000-2D材料模型的新颖版本，该模型允许输入热机械数据，从而对材料在高温下的行为进行建模。评估了考虑应力松弛数据对预测形状变形的影响。结果表明，考虑材料的热机械各向异性和应力松弛行为，以高精度预测部件的最终几何形状非常重要。在有限元（FE）分析中实施高级材料模型，