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Formation of Vacancy-Type Dislocation Loops in Hydrogen-Ion-Implanted Fe–Cr Alloy

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

Fe–10 at.%Cr alloy was implanted with hydrogen ions at room temperature, followed by annealing at high temperatures. The annealing process made the defects develop into large dislocation loops. The nature of the dislocation loops formed after annealing was studied by the evolution of loops under in situ electron irradiation in high-voltage electron microscope. It indicated that only interstitial-type loops were observed when annealed at 550 °C and below, but vacancy-type loops started to form at the temperature higher than 600 °C. According to the previous study of our group, the presence of chromium element made the formation temperature of vacancy-type loops higher than that in pure iron. The effect of alloying elements on the formation temperature of the vacancy-type loops was discussed.

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Acknowledgement

This work was supported by the National Natural Science Foundation of China (Grant No. 51471026) The authors gratefully acknowledge the High-Voltage Electron Microscope Laboratory in Hokkaido University, Japan. The help and suggestions from Professor Naoyuki Hashimoto were highly appreciated.

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Authors and Affiliations

  1. Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology, Beijing, Beijing, 100083, China

    Yu-Feng Du, Li-Juan Cui, Wen-Tuo Han & Fa-Rong Wan

Authors
  1. Yu-Feng Du
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  2. Li-Juan Cui
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  3. Wen-Tuo Han
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  4. Fa-Rong Wan
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Correspondence to Fa-Rong Wan.

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Du, YF., Cui, LJ., Han, WT. et al. Formation of Vacancy-Type Dislocation Loops in Hydrogen-Ion-Implanted Fe–Cr Alloy. Acta Metall. Sin. (Engl. Lett.) 32, 566–572 (2019). https://doi.org/10.1007/s40195-018-0807-4

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  • DOI: https://doi.org/10.1007/s40195-018-0807-4

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