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Mechanical properties and microstructural characterizations of potassium doped tungsten

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Abstract
Tungsten is a very promising candidate material for plasma facing components in fusion reactor due to its high melting temperature, high thermal conductivity, low tritium inventory and low erosion rate under plasma loading [1]. The main drawbacks are its poor mechanical properties. None of the W & W alloys developed so-far has been fully optimized for structure or armour application in fusion reactors. Nor have reference tungsten grades been fully characterized [2]. The tensile properties of tungsten in the vicinity of room temperature, the ductile-brittle transition must be considered because of its effect on yield strength and other mechanical behaviors. The potassium doped tungsten grade WVWM (as received and annealed at 1600°C) produced by Plansee AG could be a potential plasma facing material for future nuclear fusion facilities and reactors such as ITER and especially DEMO. For a better understanding of both recrystallization and ductile to brittle transition temperature, tensile tests are performed on potassium doped tungsten, WVWM, up to 2000°C at different loading rates (0.2 and 42 mm/min). The mechanical properties are highly dependent on the microstructure. The etched sample surface and fracture surface after tensile testing are microstructurally assessed by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). All the obtained data will be summarized into a database that can be used for future modelling input and will be compared to the same grade material after neutron irradiation.
Keywords
fusion, Tungsten, microstructure., mechanical properties

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Please use this url to cite or link to this publication:

Chicago
Sheng, Hua, Inge Uytdenhouwen, Vincent Massaut, Guido Van Oost, and Jozef Vleugels. 2010. “Mechanical Properties and Microstructural Characterizations of Potassium Doped Tungsten.” In Proceedings of the International Conference Nuclear Energy for New Europe, ed. Andrej Trkov and Igor Lengar, 1014.1–1014.6. Nuclear Society of Slovenia.
APA
Sheng, H., Uytdenhouwen, I., Massaut, V., Van Oost, G., & Vleugels, J. (2010). Mechanical properties and microstructural characterizations of potassium doped tungsten. In A. Trkov & I. Lengar (Eds.), Proceedings of the international conference Nuclear Energy for New Europe (pp. 1014.1–1014.6). Presented at the Nuclear Energy for New Europe 2010, Nuclear Society of Slovenia.
Vancouver
1.
Sheng H, Uytdenhouwen I, Massaut V, Van Oost G, Vleugels J. Mechanical properties and microstructural characterizations of potassium doped tungsten. In: Trkov A, Lengar I, editors. Proceedings of the international conference Nuclear Energy for New Europe. Nuclear Society of Slovenia; 2010. p. 1014.1–1014.6.
MLA
Sheng, Hua, Inge Uytdenhouwen, Vincent Massaut, et al. “Mechanical Properties and Microstructural Characterizations of Potassium Doped Tungsten.” Proceedings of the International Conference Nuclear Energy for New Europe. Ed. Andrej Trkov & Igor Lengar. Nuclear Society of Slovenia, 2010. 1014.1–1014.6. Print.
@inproceedings{1260093,
  abstract     = {Tungsten is a very promising candidate material for plasma facing components in fusion reactor due to its high melting temperature, high thermal conductivity, low tritium inventory and low erosion rate under plasma loading [1]. The main drawbacks are its poor mechanical properties. None of the W \& W alloys developed so-far has been fully optimized for structure or armour application in fusion reactors. Nor have reference tungsten grades been fully characterized [2]. The tensile properties of tungsten in the vicinity of room temperature, the ductile-brittle transition must be considered because of its effect on yield strength and other mechanical behaviors. The potassium doped tungsten grade WVWM (as received and annealed at 1600{\textdegree}C) produced by Plansee AG could be a potential plasma facing material for future nuclear fusion facilities and reactors such as ITER and especially DEMO. For a better understanding of both recrystallization and ductile to brittle transition temperature, tensile tests are performed on potassium doped tungsten, WVWM, up to 2000{\textdegree}C at different loading rates (0.2 and 42 mm/min). The mechanical properties are highly dependent on the microstructure. The etched sample surface and fracture surface after tensile testing are microstructurally assessed by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). All the obtained data will be summarized into a database that can be used for future modelling input and will be compared to the same grade material after neutron irradiation.},
  author       = {Sheng, Hua and Uytdenhouwen, Inge and Massaut, Vincent and Van Oost, Guido and Vleugels, Jozef},
  booktitle    = {Proceedings of the international conference Nuclear Energy for New Europe},
  editor       = {Trkov, Andrej  and Lengar, Igor},
  isbn         = {9789616207317},
  language     = {eng},
  location     = {Portoro\v{z}, Slovenia},
  pages        = {1014.1--1014.6},
  publisher    = {Nuclear Society of Slovenia},
  title        = {Mechanical properties and microstructural characterizations of potassium doped tungsten},
  year         = {2010},
}