Extra strengthening and superplasticity of ultrafine-grained A2024 alloy produced by high-pressure sliding

Takahiro Masuda, Yoichi Takizawa, Manabu Yumoto, Yoshiharu Otagiri, Zenji Horita

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, the method of high-pressure sliding (HPS) was applied for grain refinement of an A2024 alloy. Sheet samples with 10-15 mm width and 100 mm length with 1 mm thickness were processed by HPS under pressures of 2-3 GPa. Microstructural observations revealed that the grain size was refined to ∼200 nm. Tensile tests showed that the ultimate tensile strength reached 886 MPa with a total elongation of 7.1% and the anisotropy of samples was less developed in the HPS-processed samples. Extra strengthening was attained by aging at 423 K after HPS processing, leading to an ultimate tensile strength of 967 MPa at the peak aged condition. Superplastic elongation of more than 400% appeared when the A2024 alloy processed by HPS for 20 mm was deformed in tension at a testing temperature of 623 K with an initial strain rate of 1.0× 10-3 s-1.

Original languageEnglish
Pages (from-to)1647-1655
Number of pages9
JournalMaterials Transactions
Volume58
Issue number12
DOIs
Publication statusPublished - Jan 1 2017

All Science Journal Classification (ASJC) codes

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

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