Effect of strain rate on impact response and dislocation substructure of 6061-T6 aluminum alloy

Woei Shyan Lee, Jia Chyuan Shyu, Su Tang Chiou

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

The dynamic deformation mechanisms and the effects of strain rate on the impact strength and dislocation substructure of 6061-T6 Al alloy were studied to optimize the alloy's deformation and fracture performance under high loading rates. The impact response of 6061-T6 Al alloy was affected strongly by applied strain rate, resulting in variations of work hardening rate, strain rate sensitivity and activation volume. The rate of work hardening decreased with strain and strain rate, and was related linearly to the inverse of flow stress. Strain rate sensitivity decreased with work hardening stress. However, for activation volume, the inverse was found. Substructure evolution consisted of dislocation cells and numerous dislocation loops.

Original languageEnglish
Pages (from-to)51-56
Number of pages6
JournalScripta Materialia
Volume42
Issue number1
DOIs
Publication statusPublished - 1999 Dec 17

All Science Journal Classification (ASJC) codes

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

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