基于中子与同步辐射技术的工程材料/部件多尺度残余应力评价
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李时磊, 李阳, 王友康, 王胜杰, 何伦华, 孙光爱, 肖体乔, 王沿东
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Multiscale Residual Stress Evaluation of Engineering Materials/Components Based on Neutron and Synchrotron Radiation Technology
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LI Shilei, LI Yang, WANG Youkang, WANG Shengjie, HE Lunhua, SUN Guang'ai, XIAO Tiqiao, WANG Yandong
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图8 X射线衍射差分光阑(DAXM)三维原位表征技术原理图与测量结果[57]
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Fig.8 Schematic of differential aperture X-ray diffraction microscopy (DAXM) for in situ characterization of three-dimensional microstress (a) and the characterizations of micro-orientation gradient and lattice strain gradient related to fatigue damage in AL6XN stainless steel by DAXM (DD—direct direction; qFWHM denotes the full width of half miximum, the diffracted intensity as a function of diffraction vector q ) (b1-b3)[57]
(b1) schematic of a tensile specimen cut from a fatigued sample of stainless steel, a crystal orientation map slicing along the X-ray beam direction and a map of the (480) diffraction peak FWHM of the same [001] grain
(b2) maps of lattice orientation showing grain subdivision
(b3) lattice strain distributions in the [001]//LD grain after applying a tensile strain of 0.5%
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