Equal-channel angular pressing of commercial aluminum alloys: Grain refinement, thermal stability and tensile properties

Zenji Horita, Takayoshi Fujinami, Minoru Nemoto, Terence G. Langdon

Research output: Contribution to journalArticle

387 Citations (Scopus)

Abstract

Using equal-channel angular (ECA) pressing at room temperature, the grain sizes of six different commercial aluminum-based alloys (1100, 2024, 3004, 5083, 6061, and 7075) were reduced to within the submicrometer range. These grains were reasonably stable up to annealing temperatures of approximately 200 °C and the submicrometer grains were retained in the 2024 and 7075 alloys to annealing temperatures of 300 °C. Tensile testing after ECA pressing through a single pass, equivalent to the introduction of a strain of approximately 1, showed there is a significant increase in the values of the 0.2 pct proof stress and the ultimate tensile stress (UTS) for each alloy with a corresponding reduction in the elongations to failure. It is demonstrated that the magnitudes of these stresses scale with the square root of the Mg content in each alloy. Similar values for the proof stresses and the UTS were attained at the same equivalent strains in samples subjected to cold rolling, but the elongations to failure were higher after ECA pressing to equivalent strains >1 because of the introduction of a very small grain size. Detailed results for the 1100 and 3004 alloys show good agreement with the standard Hall-Petch relationship.

Original languageEnglish
Pages (from-to)691-701
Number of pages11
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume31
Issue number3
DOIs
Publication statusPublished - Jan 1 2000

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Equal channel angular pressing
Grain refinement
tensile properties
pressing
Tensile properties
aluminum alloys
Aluminum alloys
Thermodynamic stability
thermal stability
tensile stress
Tensile stress
elongation
Elongation
grain size
Annealing
cold rolling
annealing
Cold rolling
Tensile testing
Aluminum

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Equal-channel angular pressing of commercial aluminum alloys : Grain refinement, thermal stability and tensile properties. / Horita, Zenji; Fujinami, Takayoshi; Nemoto, Minoru; Langdon, Terence G.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 31, No. 3, 01.01.2000, p. 691-701.

Research output: Contribution to journalArticle

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