Please use this identifier to cite or link to this item:
Title: Elastic-plastic deformation of Pb(Zn1/3Nb2/3)O 3-(6-7)% PbTiO3 single crystals during nanoindentation
Authors: Wong, M.F.
Zeng, K. 
Keywords: Elastic-plastic deformation
Relaxor single crystal
Issue Date: May-2010
Citation: Wong, M.F., Zeng, K. (2010-05). Elastic-plastic deformation of Pb(Zn1/3Nb2/3)O 3-(6-7)% PbTiO3 single crystals during nanoindentation. Philosophical Magazine 90 (13) : 1685-1700. ScholarBank@NUS Repository.
Abstract: The elastic-plastic deformation behavior of (001)- and (011)-oriented single crystal solid solutions of Pb(Zn1/3Nb2/3)O 3-(6-7)% PbTiO3 (PZN-PT) have been studied using a nanoindentation technique. A procedure is presented here to isolate the elastic, elastic-plastic and plastic contributions to the deformation using the unloading data, and a parameter, referred to as relaxation, is defined to characterize the elastic-plastic deformation during nanoindentations. This relaxation parameter increases with the maximum indentation load due to the higher indentation stress induced, and it also causes less recovery of the material upon indentation unloading compared to predicted pure elastic recovery. For a (001) surface, the relaxation value remains virtually unchanged within the range of the maximum indentation load of 10-50 mN, possibly due to a complete localized depoling of the non-180 domain switching. It is also found that the unpoled surface is more prone to stress-induced depolarization compared to the poled surfaces. Furthermore, by applying the continuous stiffness measurement (CSM) technique, the effects of multiple loading/unloading are studied for both (001)- and (011)-oriented PZN-PTs using the maximum indentation loads of 20 and 50 mN. With more loading/unloading cycles at higher CSM frequencies, stress-induced depolarization becomes prevalent and the contribution of the domain reorientation towards elastic recovery is significantly reduced. As a consequence, the relaxation value is increased, indicating more elastic-plastic deformation. This CSM effect is especially pronounced for poled (011) surfaces.
Source Title: Philosophical Magazine
ISSN: 14786435
DOI: 10.1080/14786430903459675
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

checked on Apr 20, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.