Polatidis Efthymios, Morgano Manuel, Malamud Florencia, Bacak Michael, Panzner Tobias, Van Swygenhoven Helena, Strobl Markus
Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, Villigen PSI, CH-5232 Villigen, Switzerland.
CONICET, Laboratorio Argentino de Haces de Neutrones, Departamento de Física de Neutrones, Centro Atómico Bariloche, San Carlos de Bariloche R8402AGP, Argentina.
Materials (Basel). 2020 Mar 23;13(6):1450. doi: 10.3390/ma13061450.
The transformation induced plasticity (TRIP) effect is investigated during a load path change using a cruciform sample. The transformation properties are followed by in-situ neutron diffraction derived from the central area of the cruciform sample. Additionally, the spatial distribution of the TRIP effect triggered by stress concentrations is visualized using neutron Bragg edge imaging including, e.g., weak positions of the cruciform geometry. The results demonstrate that neutron diffraction contrast imaging offers the possibility to capture the TRIP effect in objects with complex geometries under complex stress states.
利用十字形试样研究了加载路径变化过程中的相变诱发塑性（TRIP）效应。通过对十字形试样中心区域进行原位中子衍射来跟踪相变特性。此外，利用中子布拉格边缘成像（包括十字形几何形状的薄弱位置等）可视化应力集中引发的TRIP效应的空间分布。结果表明，中子衍射对比度成像能够在复杂应力状态下对具有复杂几何形状的物体中的TRIP效应进行捕捉。
