中子衍射应力分析技术及其应用进展

林皓, 李建, 杨钊龙, 钟圣怡

Recent Progress in Stress Analysis Technology and Application of Neutron Diffraction

LIN Hao, LI Jian, YANG Zhaolong, ZHONG Shengyi

图6 CrMnFeCoNi合金在低温下的晶体结构和变形行为[51]

Fig.6 Crystal structure and deformation behavior of CrMnFeCoNi alloy at low temperature[51] (a) selected diffraction patterns at room temperature and at 15 K during deformation, showing a clean single-phase fcc structure (σu—ultimate tensile strength) (b) true stress-strain curves at room temperature, 140 K, and 15 K (The trend of temperature fluctuations (right-hand axis) due to serrations at 15 K is also superimposed) (c) two serrations are shown with temperature (plotted in reverse scale for better comparison) to illustrate details of serrated deformation (d) plots of strain-hardening rate (SHR) at three temperatures (Δσ—change in true stress, Δε—change in true strain) (e) SEM image of the fractured sample at 15 K showing the 45° wedge