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X射线法用于缺口根部和裂纹尖端等徽区的残余应力测试的先决条件是解决缩小光束直径、提高衍射束的强度和准确设置试样等技术问题.在X射线衍射仪上借助于自行设计制造的限束对光装置和侧倾对中附件,成功地测定了缺口根部半径为1mm的喷丸残余应力场和板形试样压-压周期载荷下裂纹尖端的残余拉应力场.
X-ray method for notch root and crack tip and other emblem of the residual stress test prerequisite is to solve the problem of reducing the beam diameter, increasing the intensity of the diffraction beam and accurately set the sample and other technical problems in the X-ray diffraction instrument designed by means of self- The residual stress field at the notch root radius of 1mm and the residual tensile stress field of the crack tip under the plate-shaped specimen pressure-cycle loading were measured successfully.