Deformation twinning is an important deformation mode in magnesium alloys. Despite this, little is known on the extent to which the stress for twinning can be altered by a dispersion of second phase particles. The current paper presents a series of findings on the role of differently shaped particles on both the stress required for twinning and the characteristics of the twins that form. It is shown that plate shaped particles are, as one might expect, an effective strengthener to {10-12} twinning. When precipitate plates form on the basal planes, the relative hardening of basal slip is minor in comparison to that seen for twinning. This provides opportunity for the alloy designer to control the apparent critical resolved shear stresses (CRSS) for the different deformation modes. Possible sources for the hardening of twins are discussed.
History
Event
Minerals, Metals and Materials Society (TMS) Annual Meeting and Exhibition (140th : 2011 : San Diego, Calif.)
Pagination
289 - 293
Publisher
John Wiley & Sons
Location
San Diego, Calif.
Place of publication
Hoboken, N. J.
Start date
2011-02-27
End date
2011-03-03
ISBN-13
9781118029367
Language
eng
Publication classification
E1 Full written paper - refereed
Copyright notice
2011, Wiley
Editor/Contributor(s)
W Sillekens, S Agnew, N Neelameggham, S Mathaudhu
Title of proceedings
TMS 2011 : Magnesium Technology 2011 : Proceedings of the Magnesium Technology Symposium