Fabrication of high-strength and high-ductility laminated A2024 aluminum alloy/aluminum composite by severe plastic deformation under high pressure

Takahiro Masuda, Zenji Horita

Research output: Contribution to journalArticle

Abstract

In this study, the method of high-pressure torsion (HPT) was applied for grain refinement of A2024/Al composites. Diffusion bonding was carried out at 773 K for 5 h to form the composite in advance. Disk samples with 10 mm diameter and 1 mm thickness were processed by HPT under a pressure of 6 GPa. The chemical composition of the diffusion treated Al layer was determined to Al-2.5%Cu-1.3%Mg by EDS analysis. Microstructural observations revealed that the grain size was refined to -180 nm in the thickness center and -440 nm in the surface side. Tensile tests showed that the ultimate tensile strength reached 710 MPa with a total elongation of 9%. Extra strengthening was attained by aging at 423 K after HPT processing, leading to an ultimate tensile strength of 760 MPa at the peak-aged condition.

Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume67
Issue number5
DOIs
Publication statusPublished - Jan 1 2017

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Aluminum
Ductility
Aluminum alloys
Plastic deformation
Torsional stress
Fabrication
Composite materials
Tensile strength
Diffusion bonding
Grain refinement
Energy dispersive spectroscopy
Elongation
Aging of materials
Processing
Chemical analysis

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "In this study, the method of high-pressure torsion (HPT) was applied for grain refinement of A2024/Al composites. Diffusion bonding was carried out at 773 K for 5 h to form the composite in advance. Disk samples with 10 mm diameter and 1 mm thickness were processed by HPT under a pressure of 6 GPa. The chemical composition of the diffusion treated Al layer was determined to Al-2.5{\%}Cu-1.3{\%}Mg by EDS analysis. Microstructural observations revealed that the grain size was refined to -180 nm in the thickness center and -440 nm in the surface side. Tensile tests showed that the ultimate tensile strength reached 710 MPa with a total elongation of 9{\%}. Extra strengthening was attained by aging at 423 K after HPT processing, leading to an ultimate tensile strength of 760 MPa at the peak-aged condition.",
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