In-situ observation of damage structure in Cu-Cr-Zr and Cu-Cr alloy during 1.25 MeV electron irradiation

M. Hatakeyama, T. Yamamoto, K. Yasuda, S. Matsumura, K. Yasunaga, K. Sato

Research output: Contribution to journalArticlepeer-review

Abstract

The sink strengths of precipitate/matrix interfaces in Cu alloys, were investigated by performing in-situ observation of electron irradiation in high-voltage electron microscopy (HVEM). Fine black spot defects, which seemed to be dislocation loops were observed at irradiation temperature ranging between RT and 373 K in Cu–Cr–Zr, Cu–Cr and GlidCop Al–60 alloys with low number density. In Cu–Cr, loops formed on a part of precipitates interfaces. Hence, a part of precipitate/matrix interfaces is a sink with interstitial bias. Whereas, most of the interfaces are neutral sinks for point defects. In the case of Cu–Cr–Zr and GlidCop Al–60, black spots formed around dislocation, which were induced during two-step heat treatment. The results showed that the precipitate/matrix interface of Cr-rich precipitates in Cu alloys serve as a strong sink for point defects.

Original languageEnglish
Article number101144
JournalNuclear Materials and Energy
Volume30
DOIs
Publication statusPublished - Mar 2022

All Science Journal Classification (ASJC) codes

  • Materials Science (miscellaneous)
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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