Aging behavior of Al-Mg-Si alloys processed by high-pressure torsion

Daichi Akama, Zenji Horita, Kenji Matsuda, Shoichi Hirosawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

This research investigates simultaneous strengthening by grain refinement and fine precipitation in age-hardenable Al-Mg-Si alloys containing an additional element of either Ag, Cu, Pt or Pd. The alloys were solution-treated and processed by high-pressure torsion (HPT) at room temperature under a pressure of 6 GPa. They were aged at a temperature of 373 K for up to a total period of 6.7 hours. Vickers microhardness was measured after selected periods of aging and the microstructures were observed by transmission electron microscopy. It was found that, in all alloys, the grain sizes after HPT were refined to 300-400 nm and there were significant increases in the hardness through the HPT processing. The hardness was further increased by the subsequent ageing treatment, confirming the simultaneous strengthening by grain refinement and fine precipitation. However, the aging behavior was different depending on the alloying compositions.

Original languageEnglish
Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD5
Pages259-264
Number of pages6
DOIs
Publication statusPublished - Feb 25 2011
Event5th International Conference on Nanomaterials by Severe Plastic Deformation, NanoSPD5 - Nanjing, China
Duration: Mar 21 2011Mar 25 2011

Publication series

NameMaterials Science Forum
Volume667-669
ISSN (Print)0255-5476

Other

Other5th International Conference on Nanomaterials by Severe Plastic Deformation, NanoSPD5
CountryChina
CityNanjing
Period3/21/113/25/11

All Science Journal Classification (ASJC) codes

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

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  • Cite this

    Akama, D., Horita, Z., Matsuda, K., & Hirosawa, S. (2011). Aging behavior of Al-Mg-Si alloys processed by high-pressure torsion. In Nanomaterials by Severe Plastic Deformation, NanoSPD5 (pp. 259-264). (Materials Science Forum; Vol. 667-669). https://doi.org/10.4028/www.scientific.net/MSF.667-669.259