Determination of the macroscopic residual stress: Modeling and experimental evaluation of texture and local grain-interaction

When the texture is present in the sheet, it is extremely difficult to test the residual stress based on the X-ray diffraction method. Based on the two extreme traditional Voigt and Reuss models, this paper proposes two specific corresponding local models (local Voigt and local Reuss) for the measurement of the plane residual stress of cold rolled sheet texture materials. The residual stress test results of CuNiSi specimen using these two local models show that the proposed local models are credible and can accurately characterize the residual stress in the specimen. In addition, based on the X-ray diffraction sin(2) psi method of the classic residual stress test, a weighted average residual stress calculation method is proposed for cold-rolled texture materials. The d(psi)-sin(2)psi method was used to analyze the effect of texture on residual stress. The results show that the copper texture C{211} < 111 > in CuNiSi specimen has the effect of concentrating the residual compressive stress in the region. The stress increased by about 50 MPa. However, the effect of brass texture B{011} < 211 > and R texture R{011} < 211 > on residual stress was not obvious.