论文标题
拉伸变形期间空隙周围的局部塑性发展
Development of local plasticity around voids during tensile deformation
论文作者
论文摘要
空隙可以限制工程组件的寿命。这激发了我们在镍碱基超合金组合实验和模拟中了解空隙周围的局部可塑性。将单晶样品与原位高角度分辨率电子背部散射衍射中的张力变形，以探测负载下的异质局部应力场；参考应力由晶体可塑性有限元模拟告知。该信息用于了解空隙周围的塑性变形的激活。我们的调查表明，虽然已解决的剪切应力表明在多个滑动系统上的滑动活性，但由于图像力和森林硬化，滑移会减小为特定系统。这项研究合理化了观察到的空隙周围塑性变形的发展，这有助于我们对组件故障和工程设计的理解。
Voids can limit the life of engineering components. This motivates us to understand local plasticity around voids in a nickel base superalloy combining experiments and simulations. Single crystal samples were deformed in tension with in-situ high angular resolution electron back scatter diffraction to probe the heterogeneous local stress field under load; the reference stress is informed by crystal plasticity finite element simulations. This information is used to understand the activation of plastic deformation around the void. Our investigation indicates that while the resolved shear stress would indicate slip activity on multiple slip systems, slip is reduced to specific systems due to image forces and forest hardening. This study rationalizes the observed development of plastic deformation around the void, aiding in our understanding of component failure and engineering design.
