Please use this identifier to cite or link to this item:
|Title:||Nanoparticle interactions with the magnesium alloy matrix during physical deformation: Tougher nanocomposites|
|Authors:||Paramsothy, M. |
Transmission electron microscopy (TEM)
|Source:||Paramsothy, M., Chan, J., Kwok, R., Gupta, M. (2012-12-14). Nanoparticle interactions with the magnesium alloy matrix during physical deformation: Tougher nanocomposites. Materials Chemistry and Physics 137 (2) : 472-482. ScholarBank@NUS Repository. https://doi.org/10.1016/j.matchemphys.2012.09.036|
|Abstract:||This study is aimed at understanding the toughness enhancing function of nanoparticles in magnesium nanocomposites, focussing on experimentally observed nanoparticle-matrix interactions during physical deformation. Al 2O3 nanoparticles were selected for reinforcement purposes due to the well known affinity between magnesium and oxygen. AZ31/AZ91 (hybrid alloy) and ZK60A magnesium alloys were reinforced with Al2O 3 nanoparticles using solidification processing followed by hot extrusion. In tension, each nanocomposite exhibited higher ultimate strength and ductility than the corresponding monolithic alloy. However, the increase in ductility exhibited by ZK60A/Al2O3 (+170%) was significantly higher than that exhibited by AZ31/AZ91/Al2O 3 (+99%). The previously unreported and novel formation of high strain zones (HSZs, from nanoparticle surfaces inclusive) during tensile deformation is highlighted here as a significant mechanism supporting ductility enhancement in ZK60A/Al2O3 (+170% enhanced) and AZ31/AZ91/Al2O3 (+99% enhanced) nanocomposites. Also, ZK60A/Al2O3 exhibited lower and higher compressive strength and ductility (respectively) compared to ZK60A while AZ31/AZ91/Al 2O3 exhibited higher and unchanged compressive strength and ductility (respectively) compared to AZ31/AZ91. Here, the previously unreported nanograin formation (recrystallization) during room temperature compressive deformation as a toughening mechanism in relation to nanoparticle stimulated nucleation (NSN) ability is also highlighted. © 2012 Elsevier B.V. All rights reserved.|
|Source Title:||Materials Chemistry and Physics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Mar 7, 2018
WEB OF SCIENCETM
checked on Feb 5, 2018
checked on Mar 11, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.