Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jallcom.2011.04.083
Title: Effect of ball milling the hybrid reinforcements on the microstructure and mechanical properties of Mg-(Ti + n-Al2O3) composites
Authors: Sankaranarayanan, S.
Jayalakshmi, S. 
Gupta, M. 
Keywords: Mechanical alloying
Mechanical properties
Metal matrix composites
Microstructure
Rapid solidification
Scanning electron microscopy (SEM)
Issue Date: 30-Jun-2011
Citation: Sankaranarayanan, S., Jayalakshmi, S., Gupta, M. (2011-06-30). Effect of ball milling the hybrid reinforcements on the microstructure and mechanical properties of Mg-(Ti + n-Al2O3) composites. Journal of Alloys and Compounds 509 (26) : 7229-7237. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jallcom.2011.04.083
Abstract: In this study, composites containing pure magnesium and hybrid reinforcements (5.6 wt.% titanium (Ti) particulates and 2.5 wt.% nanoscale alumina (n-Al2O3) particles) were synthesized using the disintegrated melt deposition technique followed by hot extrusion. The hybrid reinforcement addition into the Mg matrix was carried out in two ways: (i) by direct addition of the reinforcements into the Mg-matrix, Mg-(5.6Ti + 2.5n-Al2O3) and (ii) by pre-synthesizing the composite reinforcement by ball milling and its subsequent addition into the Mg-matrix, Mg-(5.6Ti + 2.5n-Al2O3)BM. Microstructural characterization revealed significant grain refinement due to reinforcement addition. The evaluation of mechanical properties indicated a significant improvement in microhardness, tensile and compressive properties of the composites when compared to monolithic magnesium. For the Mg-(5.6Ti + 2.5n-Al2O3) composite, wherein the reinforcements were directly added into the matrix, the improvement in strength properties occurred at the expense of ductility. For the Mg-(5.6Ti + 2.5n-Al2O 3)BM composites with pre-synthesized ball-milled reinforcements, the increase in strength properties was accompanied by an increase/retention of ductility. The observed difference in behaviour of the composites is primarily attributed to the morphology and distribution of the reinforcements obtained due to the ball-milling process, thereby resulting in composites with enhanced toughness. © 2011 Elsevier B.V. All rights reserved.
Source Title: Journal of Alloys and Compounds
URI: http://scholarbank.nus.edu.sg/handle/10635/85040
ISSN: 09258388
DOI: 10.1016/j.jallcom.2011.04.083
Appears in Collections:Staff Publications

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

SCOPUSTM   
Citations

32
checked on Sep 19, 2018

WEB OF SCIENCETM
Citations

31
checked on Sep 4, 2018

Page view(s)

35
checked on Sep 21, 2018

Google ScholarTM

Check

Altmetric


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