Micro-indentation of aluminum processed by equal channel angular extrusion

Fuqian Yang, Lingling Peng, Kenji Okazaki

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


The near-surface deformation of equal-channel angular extruded (ECAE) pure aluminum was investigated using the micro-indentation technique. Compared with fully annealed Al samples, there is a distinguishable difference in the indentation deformation. The unloading slope of the ECAE deformed Al after a short unloading period was found to be less than that of the annealed samples due to plastic recovery. Work hardening was observed, which depended on the history of local deformation. A new relationship between the plastic energy dissipated in the indentation and the applied load was derived, which is supported by the experimental results.

Original languageEnglish
Pages (from-to)1243-1248
Number of pages6
JournalJournal of Materials Research
Issue number4
StatePublished - Apr 2004

Bibliographical note

Funding Information:
This research is supported by the National Science Foundation through Grant No. DMR-0211706, monitored by Dr. Guebre Tessema and Dr. Bruce A. Mac-Donald, and Kentucky Science and Engineering Foundation through Grant No. KSEF-02-RDE-003.

ASJC Scopus subject areas

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


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