High temperature impact deformation and dislocation substructure of 6061-T6 aluminum alloy

Woei-Shyan Lee, Zih Chao Tang

Research output: Contribution to journalArticlepeer-review

Abstract

The high temperature deformation behaviour of 6061-T6 aluminum alloy is investigated at strain rates ranging from 1×103~5×103 s-1 and temperatures of 100~350°C using a compressive split-Hopkinson pressure bar system. It is found that the flow stress, work hardening rate and strain rate sensitivity all increase with increasing strain rate or decreasing temperature. Moreover, the temperature sensitivity increases with increasing strain rate and increasing temperature. The activation energy varies as a function of the strain rate and temperature and has a maximum value of 64.8 kJ/mol under the present loading conditions. The dislocation density increases, and the cell size decreases, as the strain rate is increased or the temperature decreased. The change in the dislocation density and cell size causes a corresponding change in the flow stress.

Original languageEnglish
Pages (from-to)263-270
Number of pages8
JournalJournal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
Volume34
Issue number4
Publication statusPublished - 2013 Jan 1

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'High temperature impact deformation and dislocation substructure of 6061-T6 aluminum alloy'. Together they form a unique fingerprint.

Cite this