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Nano-hardness, EBSD analysis and mechanical behavior of ultra-fine grain tungsten for fusion applications as plasma facing material

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Abstract
Tungsten and its alloys have been extensively studied in order to be used in plasma facing components for future fusion nuclear reactors such as ITER and DEMO. In this work, an evaluation of nano-hardness, microstructure/texture and mechanical behavior using nano-indentation, electron backscatter diffraction (EBSD) and tensile test was performed. The investigated materials were ultra-fine grain lab-scale tungsten and ITER-specification commercial tungsten products, taken as reference in the as-received and annealed (at 1300 degrees C for 1 h) conditions. Three ultra-fine grain (UFG) tungsten grades were produced under different spark plasma sintering conditions, namely at 2000 degrees C and 70 MPa, at 1700 degrees C and 80 MPa and, finally, at 1800 degrees C and 80 MPa. EBSD analysis provides very relevant data as it is known that the crystallographic orientation affects some features of the surface damage caused by fusion-relevant plasma exposure. The present results will serve as a reference for future studies that will be carried out using plasma-exposed samples in order to correlate the observed damage with the microstructural characteristics and mechanical behavior.
Keywords
Tungsten, EBSD, Nano-hardness, Microstructure, Texture, Mechanical Behavior, ORIENTATION DEPENDENCE, PURE TUNGSTEN, DEFORMATION, EVOLUTION

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MLA
Paulo De Almeida Reis Tanure, Leandro, et al. “Nano-Hardness, EBSD Analysis and Mechanical Behavior of Ultra-Fine Grain Tungsten for Fusion Applications as Plasma Facing Material.” SURFACE & COATINGS TECHNOLOGY, vol. 355, 2018, pp. 252–58.
APA
Paulo De Almeida Reis Tanure, L., Bakaeva, A., Lapeire, L., Terentyev, D., Vilémová, M., Matějíček, J., & Verbeken, K. (2018). Nano-hardness, EBSD analysis and mechanical behavior of ultra-fine grain tungsten for fusion applications as plasma facing material. SURFACE & COATINGS TECHNOLOGY, 355, 252–258.
Chicago author-date
Paulo De Almeida Reis Tanure, Leandro, Anastasiia Bakaeva, Linsey Lapeire, D. Terentyev, M. Vilémová, J. Matějíček, and Kim Verbeken. 2018. “Nano-Hardness, EBSD Analysis and Mechanical Behavior of Ultra-Fine Grain Tungsten for Fusion Applications as Plasma Facing Material.” SURFACE & COATINGS TECHNOLOGY 355: 252–58.
Chicago author-date (all authors)
Paulo De Almeida Reis Tanure, Leandro, Anastasiia Bakaeva, Linsey Lapeire, D. Terentyev, M. Vilémová, J. Matějíček, and Kim Verbeken. 2018. “Nano-Hardness, EBSD Analysis and Mechanical Behavior of Ultra-Fine Grain Tungsten for Fusion Applications as Plasma Facing Material.” SURFACE & COATINGS TECHNOLOGY 355: 252–258.
Vancouver
1.
Paulo De Almeida Reis Tanure L, Bakaeva A, Lapeire L, Terentyev D, Vilémová M, Matějíček J, et al. Nano-hardness, EBSD analysis and mechanical behavior of ultra-fine grain tungsten for fusion applications as plasma facing material. SURFACE & COATINGS TECHNOLOGY. 2018;355:252–8.
IEEE
[1]
L. Paulo De Almeida Reis Tanure et al., “Nano-hardness, EBSD analysis and mechanical behavior of ultra-fine grain tungsten for fusion applications as plasma facing material,” SURFACE & COATINGS TECHNOLOGY, vol. 355, pp. 252–258, 2018.
@article{8566928,
  abstract     = {Tungsten and its alloys have been extensively studied in order to be used in plasma facing components for future fusion nuclear reactors such as ITER and DEMO. In this work, an evaluation of nano-hardness, microstructure/texture and mechanical behavior using nano-indentation, electron backscatter diffraction (EBSD) and tensile test was performed. The investigated materials were ultra-fine grain lab-scale tungsten and ITER-specification commercial tungsten products, taken as reference in the as-received and annealed (at 1300 degrees C for 1 h) conditions. Three ultra-fine grain (UFG) tungsten grades were produced under different spark plasma sintering conditions, namely at 2000 degrees C and 70 MPa, at 1700 degrees C and 80 MPa and, finally, at 1800 degrees C and 80 MPa. EBSD analysis provides very relevant data as it is known that the crystallographic orientation affects some features of the surface damage caused by fusion-relevant plasma exposure. The present results will serve as a reference for future studies that will be carried out using plasma-exposed samples in order to correlate the observed damage with the microstructural characteristics and mechanical behavior.},
  author       = {Paulo De Almeida Reis Tanure, Leandro and Bakaeva, Anastasiia and Lapeire, Linsey and Terentyev, D. and Vilémová, M. and Matějíček, J. and Verbeken, Kim},
  issn         = {0257-8972},
  journal      = {SURFACE & COATINGS TECHNOLOGY},
  keywords     = {Tungsten,EBSD,Nano-hardness,Microstructure,Texture,Mechanical Behavior,ORIENTATION DEPENDENCE,PURE TUNGSTEN,DEFORMATION,EVOLUTION},
  language     = {eng},
  location     = {Lisbon, PORTUGAL},
  pages        = {252--258},
  title        = {Nano-hardness, EBSD analysis and mechanical behavior of ultra-fine grain tungsten for fusion applications as plasma facing material},
  url          = {http://dx.doi.org/10.1016/j.surfcoat.2018.01.075},
  volume       = {355},
  year         = {2018},
}

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