Effects of Primary Processing Techniques and Significance of Hall-Petch Strengthening on the Mechanical Response of Magnesium Matrix Composites Containing TiO2 NanoparticulatesReport as inadecuate


Effects of Primary Processing Techniques and Significance of Hall-Petch Strengthening on the Mechanical Response of Magnesium Matrix Composites Containing TiO2 Nanoparticulates


Effects of Primary Processing Techniques and Significance of Hall-Petch Strengthening on the Mechanical Response of Magnesium Matrix Composites Containing TiO2 Nanoparticulates - Download this document for free, or read online. Document in PDF available to download.

Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore





*

Author to whom correspondence should be addressed.



Academic Editor: Thomas Nann

Abstract In the present study, Mg 1.98 and 2.5 vol % TiO2 nanocomposites are primarily synthesized utilizing solid-phase blend-press-sinter powder metallurgy PM technique and liquid-phase disintegrated melt deposition technique DMD followed by hot extrusion. Microstructural characterization of the synthesized Mg-TiO2 nanocomposites indicated significant grain refinement with DMD synthesized Mg nanocomposites exhibiting as high as ~47% for 2.5 vol % TiO2 NPs addition. X-ray diffraction studies indicated that texture randomization of pure Mg depends not only on the critical amount of TiO2 NPs added to the Mg matrix but also on the adopted synthesis methodology. Irrespective of the processing technique, theoretically predicted tensile yield strength of Mg-TiO2 nanocomposites was found to be primarily governed by Hall-Petch mechanism. Among the synthesized Mg materials, solid-phase synthesized Mg 1.98 vol % TiO2 nanocomposite exhibited a maximum tensile fracture strain of ~14.5%. Further, the liquid-phase synthesized Mg-TiO2 nanocomposites exhibited higher tensile and compression properties than those primarily processed by solid-phase synthesis. The tensile-compression asymmetry values of the synthesized Mg-TiO2 nanocomposite was found to be lower than that of pure Mg with solid-phase synthesized Mg 1.98 vol % TiO2 nanocomposite exhibiting as low as 1.06. View Full-Text

Keywords: Mg 1.98 and 2.5 vol % TiO2 nanocomposites; synthesis techniques; Hall-Petch mechanism; tensile properties; compression properties Mg 1.98 and 2.5 vol % TiO2 nanocomposites; synthesis techniques; Hall-Petch mechanism; tensile properties; compression properties





Author: Ganesh Kumar Meenashisundaram, Mui Hoon Nai and Manoj Gupta *

Source: http://mdpi.com/



DOWNLOAD PDF




Related documents