Equal-channel angular pressing as a production tool for superplastic materials

Zenji Horita, S. Lee, S. Ota, K. Neishi, T. G. Langdon

Research output: Contribution to journalConference articlepeer-review

11 Citations (Scopus)

Abstract

Equal-channel angular pressing (ECAP) was applied for grain refinement of Al-3%Mg-0.2%Fe and Al-3%Mg-0.2%Ti alloys and also for a commercial Al 2024 alloy. The grain sizes of the alloys were reduced to ∼0.3 μm. The stability of the fine-grained structures were examined and it was found that the small grains remained stable up to the temperatures of ∼250°C for the Al-3%Mg-0.2%Fe and Al-3%Mg-0.2%Ti alloys and ∼400°C for the Al 2024 alloy. Tensile tests revealed maximum elongations of ∼370% and ∼180% in the Al-3%Mg-0.2%Fe and Al-3%Mg-0.2%Ti alloys, respectively, at a temperature of 250°C with an initial strain rate of 3.3×10-4 s-1. There is some evidence for low temperature superplasticity in the Al-3%Mg-0.2%Fe alloy. A maximum elongation of ∼460% was attained in the Al 2024 alloy at 400°C with an initial strain rate of 10-3 s-1. It is demonstrated that the ECAP can be effective in producing superplastic materials.

Original languageEnglish
Pages (from-to)471-476
Number of pages6
JournalMaterials Science Forum
Volume357-359
DOIs
Publication statusPublished - 2001
EventSuperplasticity in Advanced Materials (ICSAM-2000) - Orlando, FL, United States
Duration: Aug 1 2000Aug 4 2000

All Science Journal Classification (ASJC) codes

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

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