Influence of pre-implanted helium on dislocation loop type in tungsten under self-ion irradiation
Influence of pre-implanted helium on dislocation loop type in tungsten under self-ion irradiation
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DOI：
10.1016/j.scriptamat.2018.02.040
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发表时间：
2018-06-01
影响因子：
6
通讯作者：
Donnelly, S. E.
中科院分区：
文献类型：
--
作者：
Harrison, R. W.;Hinks, J. A.;Donnelly, S. E.
透射电子显微镜与原位离子辐照已被用来检查位错环的形成过程中的原始W和样品预注入He的自离子辐照。在< 111 >< 100 >原始W和预植入He的样品中均观察到B = +/- 1/2和B =的位错环。这与He/H离子辐照的先前工作形成对比，其中< 100 >在W中没有观察到B =型环。B =< 100 >位错环在级联过程中形成，He对形成的位错环的类型没有影响;与< 100 >FeCr合金中的B =型环形核不同。(C)2018 Acta Materialia Inc.爱思唯尔有限公司出版
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.