First, two tungsten slabs with different purity (pure tungsten and doped tungsten) were prepared by the cold isostatic pressing-sintering method. Etc.) mixed into commercial pure tungsten powder. Subsequently, one-way rolling was performed, and sampling was performed when the rolling deformation was 27%, 46%, 70%, and 90%. The preparation parameters of the pure tungsten sample and the doped tungsten sample remained exactly the same. For each rolling reduction plate, observe in the TD view (a plane perpendicular to the transverse direction). The EBSD samples were mechanically polished and then electrolytically polished with 2.0 wt% NaOH aqueous solution at 5.0 V at ambient temperature. Then through HKL Channel 5 software for grain size and texture analysis. The Vickers microhardness measurement was performed on each sample, and a load of 100 g (0.98 N, HV0.1) was applied, and the residence time was 15 s. The microhardness value is calculated from the average of 10 indentations. Nanoindentation measurement (Nano Indenter II, MTS system) is performed on the polished surface, using continuous stiffness mode (CSM), the maximum indentation depth is set to 2000 nm, the strain rate is 0.05/s, and the Poisson's ratio is 0.25). Use CS analyzer (CS844, Lyco Co., Ltd.) to analyze the content of impurities C and S, use ONH analyzer (ONH836, Lyco Co., Ltd.) to analyze the content of impurities O and N, and use inductively coupled plasma for other impurity elements Mass spectrometer (ICP-MS 7700, Aligent Co., Ltd.) for analysis.
