Role of displacement cascades in Ni clustering in a ferritic Fe-3.3 at%Ni model alloy: Comparison of heavy and light particle irradiations

SCRIPTA MATERIALIA

卷:188

Article

Belkacemi, L. T.^1,5  Meslin, E.¹  Decamps, B.²  Crocombette, J. -P.¹  Tissot, O.³  Vandenberghe, T.³  Desgardin, P.⁴  Sauvage, T.⁴  Berthier, C.^1,5 

[1] Univ Paris Saclay, CEA, Serv Rech Met Phys, Gif Sur Yvette, France

[2] Univ Paris Saclay, Lab Phys Infinis Irene Joliot Curie IJC Lab 2, Orsay, France

[3] Univ Paris Saclay, CEA, Serv Rech Met Appl, Gif Sur Yvette, France

[4] CNRS, Condit Extremes & Mat Haute Temp & Irradiat CEMHT, UPR 3079, Site Cyclotron,3A Rue Ferollerie, F-45071 Orleans 2, France

[5] Ecole Mines Paris, Ctr Mat, Paris, France

关键词: Segregation;    Atom probe tomography;    Nanoindentation;    Irradiation embrittlement;   

DOI  :  10.1016/j.scriptamat.2020.07.031

来源: Elsevier

【 摘 要 】

The behavior of solute atoms in an undersaturated Fe-3.3 at.%Ni model alloy upon heavy and light particle irradiations was investigated by Atom Probe Tomography. Whereas first irradiations, performed using 27 MeV Fe ions at 400 degrees C, highlight significant Ni enrichment on point defect clusters, solute-rich features detected after 2.8 MeV H+ ion (400 degrees C) and 1 MeV electron (320 degrees C) irradiations are only associated with pre-existent microstructural defects. Nanoindentation tests show no hardening in light particle irradiated samples, strongly suggesting that no dislocation loop formed. These observations put forward the importance of point defect clusters resulting from displacement cascades in Ni clusters' formation. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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