Dynamic Deformation Behaviour and Dislocation Substructure of AZ80 Magnesium Alloy over a Wide Range of Temperatures

Woei Shyan Lee, Cheng Wen Chou

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

Abstract

The high strain rate deformation behaviour and dislocation substructure of AZ80 magnesium alloy are investigated at strain rates of 8x102 s-1, 1.5x103 s-1 and 2.2x103 s-1 and temperatures of-100 C, 25 C and 300 C using a compressive split-Hopkinson pressure bar system. The flow stress, work hardening coefficient, strain rate sensitivity and temperature sensitivity all increase with increasing strain rate or decreasing temperature. Moreover, the dynamic deformation behaviour is well described by the Zerilli-Armstrong hcp constitutive equation. Transmission electron microscopy observations show that the dislocation density increases with a higher strain rate or a lower temperature. Finally, the flow stress varies linearly with the square root of the dislocation density in accordance with the Bailey-Hirsch model.

Original languageEnglish
Title of host publicationDYMAT 2018 - 12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
EditorsAntonio Cosculluela, Ezio Cadoni, Eric Buzaud, Herve Couque
PublisherEDP Sciences
ISBN (Print)9782759890538
DOIs
Publication statusPublished - 2018 Sep 7
Event12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT 2018 - Arcachon, France
Duration: 2018 Sep 92018 Sep 14

Publication series

NameEPJ Web of Conferences
Volume183
ISSN (Print)2101-6275
ISSN (Electronic)2100-014X

Other

Other12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT 2018
CountryFrance
CityArcachon
Period18-09-0918-09-14

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Lee, W. S., & Chou, C. W. (2018). Dynamic Deformation Behaviour and Dislocation Substructure of AZ80 Magnesium Alloy over a Wide Range of Temperatures. In A. Cosculluela, E. Cadoni, E. Buzaud, & H. Couque (Eds.), DYMAT 2018 - 12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading [03010] (EPJ Web of Conferences; Vol. 183). EDP Sciences. https://doi.org/10.1051/epjconf/201818303010