Aluminum matrix composites (AMCs) reinforced with aluminum diboride (AlB 2) particles are obtained through a casting process. A mixture design experiment combined with split-split plot experiment helped to assess the significance of the effects of cold work on precipitation hardening prior to aging. Both cold work and aging allowed higher microhardness of the composite matrix, which is further increased by higher levels of boron and copper. Microstructure analysis showed a good distribution of reinforcements and revealed a grain subdivision pattern due to cold work. Tensile tests helped corroborate the microhardness measurements. Fracture surface analysis showed a predominantly mixed brittle—ductile mode.
Deppisch, C. , Liu, G., Shang , J.K. and Economy, J. (1997). Processing and Mechanical Properties of AlB2 Flake Reinforced Al-Alloy Composites , Materials Science and Engineering, A225: 153-161.
2.
Suarez, O.M. (2001). Mechanical Properties of a Novel Aluminum Matrix Composite Containing Boron, Journal of the Mechanical Behavior of Materials, 12: 225-237.
3.
Montgomery, D.C. (2002). Chapters 3, 6, 11, 13, Design and Analysis of Experiments, 5th edn, 218, John Wiley & Sons, New York.
4.
Suárez, O.M. , Yupa Luna, J. and Calderón, H.E. (2003). Precipitation Hardening in Novel Cast Aluminum Matrix Composite, American Foundry Society, 03-058(02): 159-166.
5.
Myers, R.H. and Montgomery, D.C. (2002). Chapters 10, 12, 13, Response Surface Methodology: Process and Product Optimization Using Designed Experiments , 2nd edn, pp. 521-690, John Wiley & Sons, New York.
6.
ASTM Standard D3552, 1996 ( 2002). Standard Test Method for Tensile Properties of Fiber Reinforced Metal Matrix Composites, ASTM International , West Conshohocken, PA.
7.
Minitab Statistical Software (2000). MINITAB Release 13.1, MINITAB INC.
8.
Hughes, D.A. , Kassner, M.E., Stout , M.G. and Vetrano, J.S. (1998). Metal Forming at the Center of Excellence for the Synthesis and Processing of Advance Materials , JOM, 50(6): 16-21.
9.
Han, P. (1992). Tensile Testing, p. 97, Materials Information Society (ASM International), Materials Park, Ohio .
10.
Deschamps, A., Esmaeili, S., Poole , W.J. and Militzer, M. (2000). Strain Hardening in Relation to Microstructure in Precipitation Hardening Materials, Proceedings of the 6th Japan-France Materials Science Seminar, Poitiers-France, PR6: 151-156.
11.
Deschamps, A. , Brechet, Y. and Guyot, P. (1999). Interactions between Plasticity and Precipitation, Proceedings of the 7th Seminar of the International Federation for Heat Treatments and Surface Engineering, Budapest, Hungary.
12.
ASTM Standard E8M-03 ( 2003). Standard Test Methods for Tension Testing of Metallic Materials (Metric), ASTM International, West Conshohocken, PA.
13.
Kurtz, R.J., Jones, R.H., Bloom, E.E., Rowcliffe, A.F., Smith, D.L., Odette, G.R. and Wiffen, F.W. (2001). (FT2/5) Progress in the U.S. Program to Develop Low-Activation Structural Materials for Fusion. IAEA.
14.
Porter, D.A. and Easterling, K.E. (2000). Precipitation in Age-Hardening Alloys, Phase Transformations in Metals and Alloys, 2nd edn, pp. 291-307, Nelson Thornes Ltd., Cheltenham, UK.
Nie, J.F. and Muddle, B.C. (2001). On the Form of the Age-Hardening Response in High Strength Aluminum Alloys, Materials Science and Engineering, A319-321: 448-451.
17.
Mills, K., Davis, J.R., Destefani, J.E., Dieterich, D.A., Frissell, H.J., Crankovic, G.M. and Jenkins, D.M. (1987). ASM Handbook Volume 12: Fractography, 9th edn, 76, Materials Information Society (ASM International), Metals Park, OH.
18.
Hull, D. (1999). Fractography, Observing, Measuring and Interpreting Fracture Surface Topography, p. 194, Cambridge University Press, New York.
19.
Goldstein, J.I., Newbury, D.E., Echlin, P., Joy, D.C., Romig Jr, A.D., Lyman, C.E., Fiori, C. and Lifshin, E. (1992). Scanning Electron Microscopy and X-Ray Microanalysis: A Text for Biologists, Materials Scientists and Geologists, 2nd edn, p. 331, Plenum Press, New York.
20.
Sample Spectra for SEM, http://www.edax.com, as on 04 August 2008. http://www.edax.com/Snippet.cfm?Snippet_ID=989
21.
Anderson, M.J. and Whitcomb, P.J. (1998). Find the Most Favorable Formulations, Chemical Engineering Progress , 94(4): 63-67.
