Influence of pre-implanted helium on dislocation loop type in tungsten under self-ion irradiation

SCRIPTA MATERIALIA

卷:150

Article

Harrison, R. W.¹  Hinks, J. A.¹  Donnelly, S. E.¹ 

[1] Univ Huddersfield, Sch Comp & Engn, Huddersfield HD1 3DH, W Yorkshire, England

关键词: Tungsten;    Irradiation;    Fusion;    Dislocation;    In situ TEM;   

DOI  :  10.1016/j.scriptamat.2018.02.040

来源: Elsevier

【 摘 要 】

Transmission electron microscopy with in-situ ion irradiation has been used to examine dislocation loop formation during self-ion irradiation of pristine W and samples pre-implanted with He. Dislocation loops with b = +/- 1/2 < 111 > and b = < 100 > were observed in both the pristine W and samples pre-implanted with He. This contrasts previous works with He/H ion irradiation where no b = < 100 > type loops have been observed in W. The b = < 100 > dislocation loops form during the cascade and He has no effect on the type of dislocation loop formed; unlike b = < 100 > type loop nucleation in FeCr alloys. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd.

【 授权许可】

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