Effect of annealing on microstructure, texture and hardness of ITER-specification tungsten analyzed by EBSD, vickers micro-hardness and nano-indentation techniques

L. Tanure; A. Bakaeva; A. Dubinko; D. Terentyev; K. Verbeken

doi:10.1016/j.jnucmat.2019.07.005

Effect of annealing on microstructure, texture and hardness of ITER-specification tungsten analyzed by EBSD, vickers micro-hardness and nano-indentation techniques

L. Tanure (Corresponding author)
, A. Bakaeva
, A. Dubinko
, D. Terentyev
, K. Verbeken

Research output: Contribution to journal › Article › Academic › peer-review

40 Citations (Scopus)

1 Downloads (Pure)

Abstract

Tungsten and its alloys have been extensively studied to be used as materials for plasma facing components (PFCs) in future nuclear fusion reactors. Under fusion operating conditions, the surface of PFCs will experience high heat flux exposure which will affect some microstructural features of the material. In the present work, the effect of annealing temperature on microstructure, texture and mechanical behavior of ITER-specification commercial pure tungsten was investigated by combining Electron Backscatter Diffraction (EBSD), Vickers micro-hardness and nano-indentation techniques. The samples were analyzed in the as-received and in the annealed conditions. Annealing was done for 1 h at three different temperatures: 1300 °C, 1500 °C and 1800 °C. Three stages in microstructural evolution were observed: recovery at 1300 °C, recrystallization at 1500 °C and grain growth at 1800 °C. As the annealing temperature increases and recrystallization takes place, α-fiber texture components are strengthened. Simultaneously, a reduction in both Vickers and nano-indentation hardness is found.

Original language	English
Pages (from-to)	191-199
Number of pages	9
Journal	Journal of Nuclear Materials
Volume	524
DOIs	https://doi.org/10.1016/j.jnucmat.2019.07.005
Publication status	Published - 1 Oct 2019
Externally published	Yes

Funding

This work has been carried out within the framework of Erasmus Mundus International Doctoral College in Fusion Science and Engineering (Fusion-DC) and the EUROfusion Consortium. This project has received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under grant agreement No 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission or of the ITER Organization. Appendix A

Keywords

EBSD
ITER
Nano-indentation
Texture
Tungsten
Vickers micro-hardness

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10.1016/j.jnucmat.2019.07.005

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title = "Effect of annealing on microstructure, texture and hardness of ITER-specification tungsten analyzed by EBSD, vickers micro-hardness and nano-indentation techniques",

abstract = "Tungsten and its alloys have been extensively studied to be used as materials for plasma facing components (PFCs) in future nuclear fusion reactors. Under fusion operating conditions, the surface of PFCs will experience high heat flux exposure which will affect some microstructural features of the material. In the present work, the effect of annealing temperature on microstructure, texture and mechanical behavior of ITER-specification commercial pure tungsten was investigated by combining Electron Backscatter Diffraction (EBSD), Vickers micro-hardness and nano-indentation techniques. The samples were analyzed in the as-received and in the annealed conditions. Annealing was done for 1 h at three different temperatures: 1300 °C, 1500 °C and 1800 °C. Three stages in microstructural evolution were observed: recovery at 1300 °C, recrystallization at 1500 °C and grain growth at 1800 °C. As the annealing temperature increases and recrystallization takes place, α-fiber texture components are strengthened. Simultaneously, a reduction in both Vickers and nano-indentation hardness is found.",

keywords = "EBSD, ITER, Nano-indentation, Texture, Tungsten, Vickers micro-hardness",

author = "L. Tanure and A. Bakaeva and A. Dubinko and D. Terentyev and K. Verbeken",

year = "2019",

month = oct,

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doi = "10.1016/j.jnucmat.2019.07.005",

language = "English",

volume = "524",

pages = "191--199",

journal = "Journal of Nuclear Materials",

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Effect of annealing on microstructure, texture and hardness of ITER-specification tungsten analyzed by EBSD, vickers micro-hardness and nano-indentation techniques. / Tanure, L. (Corresponding author); Bakaeva, A.; Dubinko, A. et al.
In: Journal of Nuclear Materials, Vol. 524, 01.10.2019, p. 191-199.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - Effect of annealing on microstructure, texture and hardness of ITER-specification tungsten analyzed by EBSD, vickers micro-hardness and nano-indentation techniques

AU - Tanure, L.

AU - Bakaeva, A.

AU - Dubinko, A.

AU - Terentyev, D.

AU - Verbeken, K.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Tungsten and its alloys have been extensively studied to be used as materials for plasma facing components (PFCs) in future nuclear fusion reactors. Under fusion operating conditions, the surface of PFCs will experience high heat flux exposure which will affect some microstructural features of the material. In the present work, the effect of annealing temperature on microstructure, texture and mechanical behavior of ITER-specification commercial pure tungsten was investigated by combining Electron Backscatter Diffraction (EBSD), Vickers micro-hardness and nano-indentation techniques. The samples were analyzed in the as-received and in the annealed conditions. Annealing was done for 1 h at three different temperatures: 1300 °C, 1500 °C and 1800 °C. Three stages in microstructural evolution were observed: recovery at 1300 °C, recrystallization at 1500 °C and grain growth at 1800 °C. As the annealing temperature increases and recrystallization takes place, α-fiber texture components are strengthened. Simultaneously, a reduction in both Vickers and nano-indentation hardness is found.

AB - Tungsten and its alloys have been extensively studied to be used as materials for plasma facing components (PFCs) in future nuclear fusion reactors. Under fusion operating conditions, the surface of PFCs will experience high heat flux exposure which will affect some microstructural features of the material. In the present work, the effect of annealing temperature on microstructure, texture and mechanical behavior of ITER-specification commercial pure tungsten was investigated by combining Electron Backscatter Diffraction (EBSD), Vickers micro-hardness and nano-indentation techniques. The samples were analyzed in the as-received and in the annealed conditions. Annealing was done for 1 h at three different temperatures: 1300 °C, 1500 °C and 1800 °C. Three stages in microstructural evolution were observed: recovery at 1300 °C, recrystallization at 1500 °C and grain growth at 1800 °C. As the annealing temperature increases and recrystallization takes place, α-fiber texture components are strengthened. Simultaneously, a reduction in both Vickers and nano-indentation hardness is found.

KW - EBSD

KW - ITER

KW - Nano-indentation

KW - Texture

KW - Tungsten

KW - Vickers micro-hardness

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SN - 0022-3115

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JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Effect of annealing on microstructure, texture and hardness of ITER-specification tungsten analyzed by EBSD, vickers micro-hardness and nano-indentation techniques

Abstract

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Keywords

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