Solute and temperature effects on the strain hardening behaviour of Mg-Zn solid solutions

Caceres, C.H. and Blake, A.H. (2008). Solute and temperature effects on the strain hardening behaviour of Mg-Zn solid solutions. In: Pavel Šandera, Materials Science Forum. 5th International Conference on Materials Structure and Micromechanics of Fracture, Brno, Czech Republic, (45-50). 27-29 June 2008. doi:10.4028/www.scientific.net/MSF.567-568.45


Author Caceres, C.H.
Blake, A.H.
Title of paper Solute and temperature effects on the strain hardening behaviour of Mg-Zn solid solutions
Conference name 5th International Conference on Materials Structure and Micromechanics of Fracture
Conference location Brno, Czech Republic
Conference dates 27-29 June 2008
Proceedings title Materials Science Forum   Check publisher's open access policy
Journal name Materials Science Forum   Check publisher's open access policy
Place of Publication Aedermannsdorf, Switzerland
Publisher Trans Tech Publications
Publication Year 2008
Year available 2008
Sub-type Fully published paper
DOI 10.4028/www.scientific.net/MSF.567-568.45
Open Access Status Not yet assessed
ISBN 0-87849-469-3
ISSN 0255-5476
Editor Pavel Šandera
Volume 567-568
Start page 45
End page 50
Total pages 6
Language eng
Abstract/Summary The Kocks-Mecking method of analysis is applied to solid solutions of up to 2.6 at.% Zn to separate the contributions to the alloys' strain hardening rate from dislocations storage, solute in solution, and twinning, for temperatures between -50 degrees C (273 K) and 200 degrees C (473 K). Athermal storage of dislocations seems to account for the largest share of the strain hardening rate for both the pure metal and the solid solutions at or below room temperature. Solute in solution does not increase the strain hardening rate over that of pure Mg, although it delays the onset of dynamic recovery, especially for the higher alloys, presumably due to short range order. Twinning remains a very important deformation mechanism for the pure metal and the dilute alloys up to 200 degrees C.
Formatted Abstract/Summary
The Kocks-Mecking method of analysis is applied to solid solutions of up to 2.6 at.% Zn to separate the contributions to the alloys' strain hardening rate from dislocations storage, solute in solution, and twinning, for temperatures between -50 °C (273 K) and 200 °C (473 K). Athermal storage of dislocations seems to account for the largest share of the strain hardening rate for both the pure metal and the solid solutions at or below room temperature. Solute in solution does not increase the strain hardening rate over that of pure Mg, although it delays the onset of dynamic recovery, especially for the higher alloys, presumably due to short range order. Twinning remains a very important deformation mechanism for the pure metal and the dilute alloys up to 200 °C.
© (2008) Trans Tech Publications, Switzerland

Subjects E1
8612 Fabricated Metal Products
091207 Metals and Alloy Materials
0912 Materials Engineering
Keyword Forest hardening
Magnesium
Magnesium-zinc alloys
Solid solution hardening
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Volume title: Materials Structure & Micromechanics of Fracture V Online available since 2007/Dec/06 at www.scientific.net

 
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Created: Fri, 10 Apr 2009, 04:29:07 EST by Sally Beard on behalf of Faculty Of Engineering, Architecture & Info Tech