AZ31B マグネシウム合金圧延板の面内圧縮加工および熱処理による室温成形性の向上

Translated title of the contribution: Improvement of Room-Temperature Formability of Rolled AZ31B Magnesium Alloy Sheets by In-Plane Compression and Subsequent Heat Treatment

Masahiro Okawa, Shigeki Mori, Koki Hiyokawa, Nobuyuki Fujii, Tomohiro Murakami, Akito Takasaki

Research output: Contribution to journalArticlepeer-review

Abstract

To improve the formability of rolled AZ31B magnesium alloy sheets at room temperature, the in-plane direction was restricted by precompression along 0 (rolling direction: RD), 30, 45, 60, and 90° (transverse direction: TD) from the rolling direction of the alloy sheets whose strain levels relative to the transverse direction were either 0.055 or 0.11. To avoid buckling during bending, a special fixture with comb teeth for thin sheet compression has been developed. The strong orientation of the basal rolling texture of the sheet was weakened after in-plane compression, and coarser grains were observed. The stretch formability was also improved. The circumferential strain (εθ) value was dramatically increased from 0.14 (as-received) to 0.30 (precompressed 11.0%) in Mg specimens. Recrystallization and grain growth occurred in grains with higher deformation energy compared with those having less energy after annealing at 250 °C. The intensity of in-plane anisotropy generated at the flange edge of the drawn product could be controlled to some extent by introducing precompressive strain.

Translated title of the contributionImprovement of Room-Temperature Formability of Rolled AZ31B Magnesium Alloy Sheets by In-Plane Compression and Subsequent Heat Treatment
Original languageJapanese
Pages (from-to)315-320
Number of pages6
JournalJournal of the Japan Society for Technology of Plasticity
Volume60
Issue number706
DOIs
Publication statusPublished - 2019

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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