Damage and deuterium retention of re-solidified tungsten following vertical displacement event-like heat load

Y. Hamaji; H. T. Lee; A. Kreter; S. Möller; M. Rasinski; M. Tokitani; S. Masuzaki; A. Sagara; M. Oya; K. Ibano; Y. Ueda; R. Sakamoto

doi:10.1016/j.nme.2016.11.003

Damage and deuterium retention of re-solidified tungsten following vertical displacement event-like heat load

Y. Hamaji, H. T. Lee, A. Kreter, S. Möller, M. Rasinski, M. Tokitani, S. Masuzaki, A. Sagara, M. Oya, K. Ibano, Y. Ueda, R. Sakamoto

Engineering Science for Advanced energy system

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

6 Citations (Scopus)

Abstract

Surface morphology and hydrogen isotope retention of W specimen melted with vertical displacement event-like heat load and subsequent deuterium (D) plasma exposure were studied. Applied heat loads using electron beam without raster scanning were about 190 and 230 MW/m² in heat flux and 0.08, 0.12 and 0.16 s in duration. After the heat load application, specimens showed apparent melting spots with grain growth or dense micrometer scale convex structure. Cracks were observed only in the part with the convex structure. D retention in the melted part of specimens was not significantly larger than in the reference specimen despite large changes of surface characteristics.

Original language	English
Pages (from-to)	1303-1307
Number of pages	5
Journal	Nuclear Materials and Energy
Volume	12
DOIs	https://doi.org/10.1016/j.nme.2016.11.003
Publication status	Published - Aug 2017

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Materials Science (miscellaneous)
Nuclear Energy and Engineering

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Damage and deuterium retention of re-solidified tungsten following vertical displacement event-like heat load. / Hamaji, Y.; Lee, H. T.; Kreter, A.; Möller, S.; Rasinski, M.; Tokitani, M.; Masuzaki, S.; Sagara, A.; Oya, M.; Ibano, K.; Ueda, Y.; Sakamoto, R.

In: Nuclear Materials and Energy, Vol. 12, 08.2017, p. 1303-1307.

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

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abstract = "Surface morphology and hydrogen isotope retention of W specimen melted with vertical displacement event-like heat load and subsequent deuterium (D) plasma exposure were studied. Applied heat loads using electron beam without raster scanning were about 190 and 230 MW/m2 in heat flux and 0.08, 0.12 and 0.16 s in duration. After the heat load application, specimens showed apparent melting spots with grain growth or dense micrometer scale convex structure. Cracks were observed only in the part with the convex structure. D retention in the melted part of specimens was not significantly larger than in the reference specimen despite large changes of surface characteristics.",

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AU - Hamaji, Y.

AU - Lee, H. T.

AU - Kreter, A.

AU - Möller, S.

AU - Rasinski, M.

AU - Tokitani, M.

AU - Masuzaki, S.

AU - Sagara, A.

AU - Oya, M.

AU - Ibano, K.

AU - Ueda, Y.

AU - Sakamoto, R.

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