Grain refinement and high strain rate superplasticity in alumunium 2024 alloy processed by high-pressure torsion

Ali Alhamidi, Zenji Horita

研究成果: ジャーナルへの寄稿記事

38 引用 (Scopus)

抄録

An Al-2024 alloy was processed by high-pressure torsion (HPT) to produce an ultrafine-grained structure with a grain size of ~240 nm. A maximum elongation of ~750% was attained with an initial strain rate of 1 × 10-2s-1 at 673 K, demonstrating the advent of high strain rate superplasticity through grain refinement by the HPT processing. Evaluation of the strain-rate sensitivity and the activation energy for the deformation confirmed that grain boundary sliding through grain boundary diffusion is the rate-controlling process for the superplastic deformation of the HPT-processed Al-2024 alloy.

元の言語英語
ページ(範囲)139-145
ページ数7
ジャーナルMaterials Science and Engineering A
622
DOI
出版物ステータス出版済み - 1 2 2015

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superplasticity
Superplasticity
Grain refinement
Torsional stress
strain rate
torsion
Strain rate
grain boundaries
Superplastic deformation
Grain boundary sliding
elongation
sliding
Elongation
Grain boundaries
Activation energy
grain size
activation energy
evaluation
Processing

All Science Journal Classification (ASJC) codes

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

これを引用

Grain refinement and high strain rate superplasticity in alumunium 2024 alloy processed by high-pressure torsion. / Alhamidi, Ali; Horita, Zenji.

:: Materials Science and Engineering A, 巻 622, 02.01.2015, p. 139-145.

研究成果: ジャーナルへの寄稿記事

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