Tangled Dislocation Structures inside Dislocation Channels of Rapid-Cooled and Tensile-Deformed Aluminum Single Crystals

Kazushige Tokuno, Masatoshi Mitsuhara, Shinnosuke Tsuchida, Ryo Tsuboi, Junji Miyamoto, Masahiro Hagino, Takashi Inoue, Kouki Nishidate

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Tangled dislocation structures inside the dislocation channels of rapid-cooled and tensile deformed aluminum single crystals were investigated by using BF-STEM. Inside the dislocation channels, arrays of the prismatic dislocation loops belonging to the primary slip system, i.e., (1 1 1)[1 0 1], were mainly formed. Dislocations of the primary coplanar slip systems such as (1 1 1)[0 1 1] and (1 1 1)[1 1 0] were activated due to the internal stresses caused by the primary dislocations pile-up inside the cleared channels. The activated primary coplanar dislocations leave the dislocation loops elongated along the edge dislocation directions behind them. Inter-dislocation-loop interactions take place especially at the arrays of the prismatic dislocation loops of the primary slip systems and produce “butterfly shape” dislocation loops. Since the “butterfly shape” dislocation loops have “sessile” junctions, they should act as “obstacles” against the following multiplications and glides of the dislocations. As the interactions proceed, the arrays are stabilized and grow as “tangles”.

Original languageEnglish
Pages (from-to)562-569
Number of pages8
JournalMaterials Transactions
Volume63
Issue number4
DOIs
Publication statusPublished - 2022

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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