Drastic influence of micro-alloying on Frank loop nature in Ni and Ni-based model alloys

Kan Ma (1) , Brigitte Décamps (2) , Anna Fraczkiewicz (3) , Frédéric Prima (4) , Marie Loyer-Prost (4)

1 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
2 IJCLab - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
3 Mines Saint-Étienne MSE - École des Mines de Saint-Étienne
4 Soutien à la Recherche de l'Institut Européen de Chimie Biologique

Nickel and its alloys are f.c.c. model materials to investigate the elementary mechanisms of radiation damage and solute effects. This paper focuses on the drastic influence of micro-alloying (0.4 wt.% Ti or Cr) on the nature of defects after ion irradiation. Ultra-high purity materials are used to avoid impurity effects. For the first time, (i) large stable intrinsic Frank loops are identified in nickel while in alloys extrinsic Frank loops are observed; (ii) an eradication mechanism of intrinsic Frank loops is clearly identified; (iii) the morphology of Frank loops is shown to be characteristic of their nature. IMPACT STATEMENT For the first time, a drastic influence of micro-alloying on the defect nature is shown in irradiated Ni systems. Minor addition of solutes modifies significantly elementary mechanisms of radiation damage.

Mots clés: Radiation damage; micro-alloying; Ni-based model alloys; Frank loop nature

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

Kan Ma, Brigitte Décamps, Anna Fraczkiewicz, Frédéric Prima, Marie Loyer-Prost. Drastic influence of micro-alloying on Frank loop nature in Ni and Ni-based model alloys. Materials Research Letters, 2020, 8, pp.201 - 207. ⟨10.1080/21663831.2020.1741042⟩. ⟨hal-03045781⟩