In the present study, elemental and nano-ZrO2 particulates reinforced magnesium materials were synthesized using an innovative disintegrated melt deposition technique followed by hot extrusion. Microstructural characterization of the composite samples showed retention of reinforcement, significant grain refinement of magnesium matrix, and the presence of minimal porosity. Mechanical properties characterization revealed that the presence of nano-ZrO2 reinforcement lead to significant improvement in hardness, 0.2% yield strength and UTS but adversely affected ductility. The results further revealed that the combination of 0.2% yield strength, UTS, and ductility exhibited by nano-ZrO2 reinforced magnesium remained much superior even when compared to magnesium reinforced with much higher volume percentage of micron-size SiCP. An attempt is made in the present study to correlate the effect of nano-ZrO2 as reinforcement and its increasing amount with the microstructural and mechanical properties of magnesium.
Fink, R. (2003). In: Kainer, K.U. (ed.), Die-Casting Magnesium, Magnesium-Alloys and Technologies, pp. 23—44, Wiley-VCH Verlag GmbH & Co., Weinheim, Germany.
2.
Magers, D. and Brussels, J. (1998). In: Mordike, B.L. and K.U. Kainer (eds), Magnesium Alloys and Their Applications, pp. 105—112, Werkstoff-Informationsge-Sellschaft , Wolfsburg, Germany.
3.
Guy, A.G. (1967). Elements of Physical Metallurgy, 2nd edn, p.233, Addison-Wesley, USA.
4.
Lloyd, D.J. (1994). Particle Reinforced Aluminum and Magnesium Matrix Composites, International Materials Reviews, 39(1): 1—23.
5.
Luo, A. (1995). Processing, Microstructure, and Mechanical Behavior of Cast Magnesium Metal Matrix Composites, Metallurgical and Materials Transactions A, 26: 2445—2455.
6.
Unverricht, R., Peitz, V., Riehemann, W. and Ferkel, H. (1998). Dispersion-strengthening of Magnesium by Nanoscaled Ceramic Powder, Proceeding of Conference on Magnesium Alloys and Their Applications, Wolfsburg, Germany, pp. 327—332.
7.
Saravanan, R.A. and Surappa, M.K. (2000). Fabrication and Characterization of Pure Magnesium—30 vol.% SiCP Particle Composite, Materials Science and Engineering A, 276: 108—116.
8.
Gupta, M., Lai, M.O. and Saravanaranganathan, D. (2000). Synthesis, Microstructure and Properties Characterization of Disintegrated Melt Deposited Mg/SiC Composites , Journal of Materials Science, 35: 2155—2165.
9.
Hassan, S.F. and Gupta, M. (2002). Development of High Strength Magnesium Based Composites Using Elemental Nickel Particulates as Reinforcement , Journal of Materials Science, 37: 2467—2474.
10.
Hassan, S.F. and Gupta, M. (2003). Development of High Strength Magnesium—Copper Based Hybrid Composites with Enhanced Tensile Properties, MaterialsScience and Technology, 19: 253—259.
11.
Hassan, S.F. and Gupta, M. (2002). Development of a Ductile Magnesium Composite Materials Using Titanium as Reinforcement, Journal of Alloys and Compounds, 345: 246—251.
12.
Singh, A., Nakamura, M., Watanabe, M., Kato, A. and Tsai, A.P. (2003). Quasicrystal Strengthened Mg—Zn—Y Alloys by Extrusion, Scripta Materialia, 49: 417—422.
13.
Hassan, S.F. and Gupta, M. (2004) Development of High-performance Magnesium Nano-composites Using Solidification Processing Route, MaterialsScience and Technology, 20: 1383—1388.
14.
Hassan, S.F. and Gupta, M. (2005). Development of High Performance Magnesium Nano-composites Using Nano-Al2O3 as Reinforcement, MaterialsScience and Engineering A, 392: 163—168.
15.
Hassan, S.F. and Gupta, M. (2006). Effect of Different Types of Nano-size Oxide Particulates on Microstructural and Mechanical Properties of Elemental Mg, Journal of Materials Science (in press).
16.
Reed-Hill, R.E. (1964). Physical Metallurgy Principles , 2nd edn, pp. 192, 267 and 725, D. Van Nostrand Company, New York, USA.
17.
Eustathopoulos, N., Nicholas, M.G. and Drevet, B. (1999). Wettability at High Temperatures vol. 3, p. 198, Pregamon Materials Series, Elsevier, UK.
Tham, L.M., Gupta, M. and Cheng, L. (1999). Influence of Processing Parameters During Disintegrated Melt Deposition Processing on Near Net Shape Synthesis of Aluminium Based Metal Matrix Composites, MaterialsScience and Technology , 15: 1139—1146.
20.
Bauccio, M. (1993). ASM Metal Reference Book, 3rd edn, p. 145, ASM International, Materials Park, USA.
21.
Morrell, R. (1985). Handbook of Properties of Technical and Engineering Ceramics, Part 1: An Introduction for the Engineer and Designer, pp. 39, 82, and 95, Her Majesty's Stationary Office, UK.
22.
Hassold, G.N. , Holm, E.A. and Srolovitz , D.J. (1990). Effects of Particle Size on Inhibited Grain Growth, Scripta Metallurgica et materialia, 24: 101—106.
23.
Shewmon, P.G. (1969). Transformation in Metals, pp. 69, McGraw-Hill Book Company, New York, USA.
24.
Murr, L.E. (1975). Interfacial Phenomena in Metals and Alloys, pp. 28, 202, and 340, Addison-Wesley, MA, USA.
25.
Naser, J., Riehemann, W. and Ferkel. H. (1997). Dispersion Hardening of Metals by Nanoscaled Ceramic Powder, Materials Science and Engineering A, 234—236: 467—469.
26.
Ashby, M.F. and Jones, D.R.H. (1996). Engineering Materials I, pp. 34 and 86, Butterworth-Heinemann, Oxford, Boston, USA.
27.
Gupta, M. and Srivatsan, TS (1999). Microstructure and Grain Growth Behavior of an Aluminum Alloy Metal Matrix Composite Processed by Disintegrated Melt Deposition , Journal of Materials Engineering Performance, 8(4): 473—478.
28.
Wua, F., Zhua, J., Chen, Y. and Zhang, G. (2000). The Effects of Processing on the Microstructures and Properties of Mater Gr/Mg Composites, MaterialsScience and Engineering A, 277: 143—147.
29.
Yang, W. and Lee, W.B. (1993). Mesoplasticity and its Applications, p. 361, Materials Research and Engineering , Springer-Verlag, Berlin, Germany.
