Data for publication: Stress evolution in plastically deformed austenitic and ferritic steels determined using angle- and energy-dispersive diffraction

The X-ray diffraction method was used to measure in situ lattice strains during the tensile test. Two separate measuring methods: energy-dispersive (ED) diffraction for austenitic steel and angle-dispersive (AD) diffraction for ferritic steel, were used to determine the lattice strains in situ during a tensile test. An experimental setup contained a dog-bone-shaped specimen stretched along the transverse direction (TD). Then, during the tensile test, the actual deformation in the elastic range and for small plastic deformation was measured by a gauge placed on the sample. For austenitic steel, the stress measurements performed in situ during the tensile test were made using synchrotron ED diffraction at BESSY (EDDI@BESSYII beamline, HZB, Berlin) using a white beam (wavelength in the range λ: 0.18 - 0.3 Å). The primary beam cross-section was equal to 1 x 1 mm2, and a double slit system restricted the angular divergence in the diffracted beam with apertures of 0.1 x 5 mm2 to Δθ ≤ 0.005°. Gathered diffraction line profiles and calculations of the lattice strains for various scattering vector orientations were used to determine the stresses. Diffractograms were collected with the steps of 0.1 vs. cos2φ, within the range of φ = (0°, 90°), in symmetrical transmission mode for a constant 2θ = 10° scattering angle. Presented files are raw diffractometer data, collected at ESRF and BESSY II, used for analysis in mentioned publication. A detailed description can be found in the related publication.

本研究采用X射线衍射（X-ray diffraction）法对拉伸试验过程中的晶格应变进行原位测量。针对奥氏体钢与铁素体钢，分别采用两种测试方案：能量色散（energy-dispersive, ED）衍射法与角度色散（angle-dispersive, AD）衍射法，以实现拉伸试验过程中的晶格应变原位测定。实验装置采用沿横向（transverse direction, TD）拉伸的狗骨形试样。拉伸试验期间，通过粘贴于试样表面的引伸计，对弹性阶段及小塑性变形阶段的实际变形量进行采集。针对奥氏体钢，本研究于柏林亥姆霍兹中心（Helmholtz-Zentrum Berlin, HZB）BESSY II同步辐射装置的EDDI光束线（EDDI@BESSYII beamline）上，利用白光光束（波长范围λ：0.18~0.3 Å）开展拉伸试验过程中的原位应力测量。入射光束截面尺寸为1×1 mm²，采用双狭缝系统限制衍射光束的角发散度，狭缝孔径为0.1×5 mm²，使得衍射角发散量Δθ≤0.005°。通过采集得到的衍射线轮廓，并针对不同散射矢量取向计算晶格应变，以此确定材料的应力状态。衍射图谱以0.1为步长对cos²φ进行扫描，扫描范围φ=(0°, 90°)，并采用对称透射模式，固定散射角2θ=10°。本次提供的原始文件为采集自欧洲同步辐射光源（European Synchrotron Radiation Facility, ESRF）与BESSY II的原始衍射仪数据，用于前述研究论文的分析工作。详细描述可参见相关研究文献。