In Situ TEM Observation and MD Simulation of Frank Partial Dislocation Climbing in AlCu Alloy

Jiao Chen, Kenta Yoshida, Tomoaki Suzudo, Yusuke Shimada, Koji Inoue, Toyohiko J. Konno, Yasuyoshi Nagai

Research output: Contribution to journalArticlepeer-review

Abstract

In situ electron irradiation using high-resolution transmission electron microscopy (HRTEM) was performed to visualize the Frank loop evolution in aluminumcopper (AlCu) alloy with an atomic-scale spatial resolution of 0.12 nm. The in situ HRTEM observation along the [110] direction of the FCC-Al lattice, Frank partial dislocation bounding an intrinsic stacking fault exhibited an asymmetrical climb along the (112) direction opposed to those in the reference pure Al under an electron irradiation, with a corresponding displacement-per-atom rate of 0.0550.120 dpa/s in a high vacuum (1.2 ×10 5 Pa). We performed theoretical calculations to simulate the asymmetrical climb of the dislocation with Burgers vector b of 1/3(111). The CuCu bonding in GuinierPreston zones was described as a possible pinning site of the dislocation climb by molecular dynamics simulation.

Original languageEnglish
Pages (from-to)468-474
Number of pages7
JournalMaterials Transactions
Volume63
Issue number4
DOIs
Publication statusPublished - 2022

Keywords

  • aluminum
  • aluminum copper alloy
  • dislocations
  • in situ transmission electron microscopy
  • lattice defect

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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