Effects of scandium and zirconium addition on recrystallization behavior of AlMgSi alloy

Ken Ichi Ikeda, Takuya Takashita, Ryutaro Akiyoshi, Satoshi Hata, Hideharu Nakashima, Kazuhiro Yamada, Kenji Kaneko

Research output: Contribution to journalArticle

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Abstract

The effects of thermally stabilized particles on the recrystallization behavior of an AlMgSi alloy were investigated to obtain the fundamental knowledge for controlling the microstructure, texture, and mechanical properties of this alloy. In this study, the AlMgSiScZr alloy was cast, homogenized, and hot-rolled. Three types of spherical Al 3 (Sc, Zr) particles with L1 2 structure, rod-like incoherent, spherical semi-coherent, and spherical incoherent particles, were observed in a hot-rolled sample of the AlMgSiScZr alloy using transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), and energy-dispersive X-ray spectroscopy (EDS). In addition, three-dimensional electron tomography (3D-ET) and STEM-EDS revealed that all particles have a core-shell structure with a Sc-enriched core and a Zr-enriched shell. It is considered that these particles are formed during casting, homogenized treatment, and hot rolling. The crystal orientation distribution of the sample after cold rolling indicated that the presence of Al 3 (Sc, Zr) particles may interfere with the recrystallization (grain growth) until 600°C. Comparison with the driving force of primary recrystallization and grain growth, and the pinning force of Al 3 (Sc, Zr) particles, showed that these particles mainly contribute to the suppression of grain growth. The results of an in-situ heating SEM/EBSD analysis of the cold-rolled AlMgSiScZr alloy supported this suggestion.

Original languageEnglish
Pages (from-to)590-597
Number of pages8
JournalMaterials Transactions
Volume59
Issue number4
DOIs
Publication statusPublished - Jan 1 2018

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Scandium
scandium
Zirconium
Grain growth
Transmission electron microscopy
Scanning electron microscopy
Energy dispersive spectroscopy
transmission electron microscopy
scanning electron microscopy
Hot rolling
Cold rolling
Crystal orientation
Tomography
Casting
Textures
cold rolling
cast alloys
Heating
Mechanical properties
Microstructure

All Science Journal Classification (ASJC) codes

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

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Effects of scandium and zirconium addition on recrystallization behavior of AlMgSi alloy. / Ikeda, Ken Ichi; Takashita, Takuya; Akiyoshi, Ryutaro; Hata, Satoshi; Nakashima, Hideharu; Yamada, Kazuhiro; Kaneko, Kenji.

In: Materials Transactions, Vol. 59, No. 4, 01.01.2018, p. 590-597.

Research output: Contribution to journalArticle

Ikeda, Ken Ichi ; Takashita, Takuya ; Akiyoshi, Ryutaro ; Hata, Satoshi ; Nakashima, Hideharu ; Yamada, Kazuhiro ; Kaneko, Kenji. / Effects of scandium and zirconium addition on recrystallization behavior of AlMgSi alloy. In: Materials Transactions. 2018 ; Vol. 59, No. 4. pp. 590-597.
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