Three-dimensional characterization of interaction between β″ precipitate and dislocation in Al-Mg-Si alloy

Kazuki Misumi, Kenji Kaneko, Takeshi Nishiyama, Takuya Maeda, Kazuhiro Yamada, Ken Ichi Ikeda, Masao Kikuchi, Ken Takata, Makoto Saga, Kohsaku Ushioda

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19 Citations (Scopus)

Abstract

Interaction between precipitates and dislocations is the most important factor governing mechanical properties of precipitation-hardening alloys. Thus large numbers of microstructural characterizations have been implemented to analyze this interaction by measuring critical angles and precipitate intervals. To date, these investigations have been performed using two-dimensional conventional transmission electron microscopy. In this study, a combination of transmission electron microscopy and computed tomography, three-dimensional electron tomography, was applied on balanced Al-Mg-Si alloy to measure critical angles and precipitate intervals and obtained 121 and 60 nm for β″ precipitates, respectively. The yield stress of precipitates measured by assigning these values, 150 MPa, was applicable to that measured from tensile test, 196 MPa.

Original languageEnglish
Pages (from-to)29-33
Number of pages5
JournalJournal of Alloys and Compounds
Volume600
DOIs
Publication statusPublished - Jul 5 2014

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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