open access publication

Article, 2020

Evolution of microstructure and texture of moderately warm-rolled pure tungsten during annealing at 1300 °C

Journal of Nuclear Materials, ISSN 1873-4820, 0022-3115, Volume 540, Page 152412, 10.1016/j.jnucmat.2020.152412

Contributors

Wang, Kang [1] Sun, Haitao [1] Zan, Xiang 0000-0003-4568-0727 (Corresponding author) [1] Ciucani, Umberto Maria 0000-0003-3881-4811 [2] Pantleon, Wolfgang Dietrich 0000-0001-6418-6260 [1] [2] Luo, Lai-Ma 0000-0002-4455-7391 [1] Wu, Yu-Cheng 0000-0002-4607-5134 [1] [3]

Affiliations

  1. [1] Hefei University of Technology
    2. [NORA names: China; Asia, East];
  2. [2] Technical University of Denmark
    3. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD];
  3. [3] Research Centre for Powder Metallurgy Engineering and Technology of Anhui Province, Hefei 230009, China
    4. [NORA names: China; Asia, East]

Abstract

The mechanical behavior, microstructure and texture evolution were investigated during isothermal annealing at 1300 °C of pure tungsten moderately warm-rolled to 67% thickness reduction. The degradation of the mechanical properties is characterized by hardness testing. The microstructure and texture evolution during heat treatment were characterized by Electron Backscatter Diffraction. During annealing of the moderately warm-rolled tungsten, recrystallization occurred first, quickly followed by relatively slow grain growth. The recrystallized volume fractions determined from hardness measurements and microstructural characterization were essentially the same. The evolution of the grain sizes during recrystallization was analyzed independently for deformed and recrystallized grains. Quantitative texture analysis showed that the overall texture strength is enhanced after recrystallization. As recrystallization strongly affects the mechanical properties of tungsten, such insights in the annealing behavior of warm-rolled tungsten plates are valuable for an understanding of their performance as potential plasma-facing materials in future fusion reactors.

Keywords

analysis, annealing, annealing behavior, backscatter diffraction, behavior, characterization, degradation, diffraction, electron, electron backscatter diffraction, evolution, fraction, fusion, fusion reactors, grain, grain growth, grain size, growth, hardness, hardness measurements, hardness test, heat, heat treatment, isothermal annealing, materials, measurements, mechanical behavior, mechanical properties, mechanical properties of tungsten, microstructural characterization, moderately, overall texture strength, performance, plasma-facing materials, plate, potential plasma-facing material, properties, properties of tungsten, pure tungsten, quantitative texture analysis, reactor, recrystallization, recrystallized grains, recrystallized volume fraction, reduction, size, strength, test, texture, texture analysis, texture evolution, texture strength, thickness, thickness reduction, treatment, tungsten, tungsten plate, volume fraction, warm-rolled

Funders

  • National Natural Science Foundation of China
  • European Commission

Data Provider: Digital Science

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