000120398 001__ 120398
000120398 005__ 20181203021220.0
000120398 0247_ $$2doi$$a10.1016/j.jnucmat.2007.01.187
000120398 022__ $$a0022-3115
000120398 02470 $$2ISI$$a000246895400004
000120398 037__ $$aARTICLE
000120398 245__ $$aEffect of helium on irradiation-induced hardening of iron: A simulation point of view
000120398 260__ $$c2007
000120398 269__ $$a2007
000120398 336__ $$aJournal Articles
000120398 520__ $$aIrradiation-induced hardening and loss of ductility of ferritic/martensitic materials envisaged for future fusion reactor is still difficult to understand. In particular, helium (He), produced by transmutation by the fusion neutrons of 14 MeV, is known to impact mechanical properties, but its effect at the microstructural level is still unclear. Molecular dynamics simulations of the mobility of an edge dislocation in iron (Fe) are performed to study the effect of He, either as a gas in solid solution or in cavities. Obstacle to the dislocation, the cavity, in the form of a void or a He bubble, is compared to a ao [100] dislocation loop, all being 2 nm in size. Results show that He in solid solution up to 1.0 at.% has a little effect on the dislocation mobility. Conversely, the cavities and the ao [10 0] dislocation loop are strong obstacles to the passage of the edge dislocation. Interestingly He bubbles present a lower obstacle strength than voids for low He contents, while for high He content the bubble promotes loop punching, which induces a strong resistance to the passage of the dislocation. (C) 2007 Elsevier B.V. All rights reserved.
000120398 700__ $$0240066$$aSchaeublin, R.$$g109859
000120398 700__ $$aChiu, Y.L.
000120398 773__ $$j362$$k2-3$$q152-160$$tJournal of Nuclear Materials
000120398 909C0 $$pCRPP
000120398 909C0 $$0252028$$pSPC
000120398 909CO $$ooai:infoscience.tind.io:120398$$pSB$$particle
000120398 937__ $$aCRPP-ARTICLE-2007-022
000120398 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000120398 980__ $$aARTICLE