<i>In Situ</i> TEM Observation and MD Simulation of Frank Partial Dislocation Climbing in Al–Cu Alloy

DOI Web Site Web Site 31 References
  • Chen Jiao
    Institute for Materials Research, Tohoku University
  • Yoshida Kenta
    Institute for Materials Research, Tohoku University
  • Suzudo Tomoaki
    Institute for Materials Research, Tohoku University Center for Computational Science and e-Systems, Japan Atomic Energy Agency
  • Shimada Yusuke
    Institute for Materials Research, Tohoku University
  • Inoue Koji
    Institute for Materials Research, Tohoku University
  • Konno Toyohiko J.
    Institute for Materials Research, Tohoku University
  • Nagai Yasuyoshi
    Institute for Materials Research, Tohoku University

Bibliographic Information

Other Title
  • In Situ TEM Observation and MD Simulation of Frank Partial Dislocation Climbing in Al-Cu Alloy

Search this article

Description

<p>In situ electron irradiation using high-resolution transmission electron microscopy (HRTEM) was performed to visualize the Frank loop evolution in aluminum–copper (Al–Cu) 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 0.055–0.120 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 Cu–Cu bonding in Guinier–Preston zones was described as a possible pinning site of the dislocation climb by molecular dynamics simulation.</p>

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 63 (4), 468-474, 2022-04-01

    The Japan Institute of Metals and Materials

References(31)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top