Fine-grained tungsten was prepared by sintering nano‑tungsten powder and its properties was further improved by warm rolling in the paper. And the microstructure and texture evolution of fine-grained tungsten under different rolling reduction was mainly investigated. Detailed microstructure characterizations under different rolling reduction stages showed a large number of sub-grain structures appeared in the fine-grained rolling tungsten grains, which increases the grain boundary area. Quantitative texture analysis showed that the rolled fine-grained tungsten had a typical BCC texture, the overall texture strength was enhanced after 50% RR and the texture intensity of grains larger than the average grain size was stronger than that of the whole grains, especially in the center of {111} pole figure. Warm rolling of fine-grained tungsten strongly affects the mechanical properties of tungsten, such insights in warm-rolled tungsten are valuable for an understanding of their performance as potential plasma-facing materials in future fusion reactors.

通过烧结纳米钨粉制备细粒钨，并通过在纸中温轧进一步改善其性能。主要研究了不同压下率下细晶钨的显微组织和织构演变。不同压下阶段的详细组织表征表明，细晶轧制钨晶粒中出现了大量亚晶组织，增加了晶界面积。定量织构分析表明，轧制的细晶钨具有典型的 BCC 织构，50% RR 后整体织构强度增强，大于平均晶粒尺寸的晶粒的织构强度强于全晶粒，尤其是在{111} 极图的中心。