Optimization of Process Parameters in Spark Plasma Sintering Al6061 and Al2124 Aluminum Alloys

Abstract:

In the present study, Al2124 and Al6061 alloys were consolidated through spark plasma sintering at 400, 450 and 500 °C using three different combinations of pressure and time (35 MPa - 20 min, 40 MPa - 15 min and 45 MPa - 10 min). The microstructure, density and hardness of sintered samples were evaluated. Full densification and the highest hardness were obtained at 450 °C. Beyond 450 °C, there was only small change of hardness. Densification of specimens was less sensitive to the applied pressure. However, the lowest pressure of 35 MPa led to the highest hardness. At higher temperatures, the increase in pressure resulted in grain growth which decreased the hardness.

• Periodical: Advanced Materials Research (Volumes 328-330)
• Pages: 1517-1522
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.328-330.1517
• Online since: September 2011
• Authors: Abdullah Khalil, Abbas Hakeem, Nouari Saheb
• Keywords: Aluminium Alloy, Density, Grain Growth, Hardness, Spark Plasma Sintering (SPS)

References

[1] R. Ohser-Wiedemann, U. Martin, H.J. Seifert, and A. Müller, Densification behaviour of pure molybdenum powder by spark plasma sintering, International Journal of Refractory Metals and Hard Materials, vol. 28, Jul. 2010, pp.550-557.

DOI: 10.1016/j.ijrmhm.2010.03.003

[2] X. Shi, H. Yang, and S. Wang, Spark plasma sintering of W–15Cu alloy from ultrafine composite powder prepared by spray drying and calcining-continuous reduction technology, Materials Characterization, vol. 60, Feb. 2009, pp.133-137.

DOI: 10.1016/j.matchar.2008.07.012

[3] H. Feng, Y. Zhou, D. Jia, and Q. Meng, Rapid synthesis of Ti alloy with B addition by spark plasma sintering, Materials Science and Engineering A, vol. 390, Jan. 2005, pp.344-349.

DOI: 10.1016/j.msea.2004.08.028

[4] C. Kim, H. Lee, S. Shin, J. Lee, D. Kim, and S. Lee, Microstructure and mechanical properties of Cu-based bulk amorphous alloy billets fabricated by spark plasma sintering, Materials Science and Engineering A, vol. 406, Oct. 2005, pp.293-299.

DOI: 10.1016/j.msea.2005.06.043

[5] T. Skiba, P. Haušild, M. Karlík, K. Vanmeensel, and J. Vleugels, Mechanical properties of spark plasma sintered FeAl intermetallics, Intermetallics, vol. 18, Jul. 2010, pp.1410-1414.

DOI: 10.1016/j.intermet.2010.02.009

[6] C. Xu, S. Jia, and Z. Cao, Synthesis of Al–Mn–Ce alloy by the spark plasma sintering, Materials Characterization, vol. 54, May. 2005, pp.394-398.

DOI: 10.1016/j.matchar.2004.12.006

[7] W. Li and L. Gao, Rapid sintering of nanocrystalline ZrO2(3Y) by spark plasma sintering, Journal of the European Ceramic Society, vol. 20, Dec. 2000, pp.2441-2445.

DOI: 10.1016/s0955-2219(00)00152-7

[8] S. Chung, K. Higashi, and W. Kim, Superplastic gas pressure forming of fine-grained AZ61 magnesium alloy sheet, Materials Science and Engineering A, vol. 372, May. 2004, pp.15-20.

DOI: 10.1016/j.msea.2003.08.125

[9] V. Sursaeva, S. Protasova, W. Lojkowski, and J. Jun, Microstructure Evolution During Normal Grain Growth Under High Pressure in 2-D Aluminium Foils, Textures and Microstructures, vol. 32, 1999, pp.175-185.

DOI: 10.1155/tsm.32.175

[10] Y.B. Wang, J.C. Ho, X.Z. Liao, H.Q. Li, S.P. Ringer, and Y.T. Zhu, Mechanism of grain growth during severe plastic deformation of a nanocrystalline Ni–Fe alloy, Applied Physics Letters, vol. 94, 2009, pp.1-3.

DOI: 10.1063/1.3065025