Grain refinement and high strengthening of 7075 aluminum alloy by high-pressure sliding

Kiyonari Tazoe, Zenji Horita

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

High-Pressure Sliding (HPS) is a new severe plastic deformation process for sheet samples under high-pressure. In this study, the HPS is applied to an age-hardenable 7075 aluminum alloy for grain refinement. HPS was conducted under a pressure of 1 GPa for sliding distances of 7.0 mm at room temperature and for 10 mm at 373 K, and thus the average grain size was reduced to -280 nm and -240 nm, respectively. Ultimate tensile strength of -600 MPa was achieved by this grain refinement. Aging at 373 K of the HPS-processed samples led to further hardening to 750 MPa. It is shown that simultaneous strengthening due to grain refinement and fine precipitation is achieved in the 7075 aluminum alloy by application of HPS and subsequent aging.

Original languageEnglish
Pages (from-to)454-458
Number of pages5
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume62
Issue number11
DOIs
Publication statusPublished - Dec 1 2012

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All Science Journal Classification (ASJC) codes

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

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