Paper Titles
Effect of Mechanical Milling on the Microstructure and Hydrogen Interaction of Both Mm-Ni and MmNi5-Ni Mixtures
p.72
Effect of the Organoclay Preparation on the Extent of the Intercalation/Exfoliation and the Barrier Properties in Polyamide-6/Montmorillonite Nanocomposites
p.78
Novel Fabrication Method of Nanofluid Having Good Roundness and High Suspension Stability
p.85
Hot Extrusion of Nanostructured Al Alloy Powder: Extrusion Ratio and Temperature Effect on the Microstructure and Mechanical Properties
p.91
Processing and Simulation for Consolidation of Nanostructured Al-Cu Powder Alloys
p.97
Rapidly Solidified Al-6Si-3Cu Alloy
p.103
Nanocrystallization Kinetics of Amorphous Fe-Based Multicomponent Alloy by Non-Isothermal Analysis
p.109
Electrolytic Manganese Dioxide Nucleation and Growth on Titanium Substrates
p.114
Diffusion-Controlled Nanocrystallization of the Fe73.5Cu1Nb3Si15.5B7 Finemet Amorphous Alloy
p.120

Processing and Simulation for Consolidation of Nanostructured Al-Cu Powder Alloys

Article Preview

Abstract:

Nanostructured aluminium-based alloys are light yet much stronger than conventional materials, which offer technological opportunities for applications such as in aerospace industry. One of the alloys of great interest for such applications is based on Al-Cu system and one of the main challenges for development of such alloys are associated with powder processing. However, processing such powder alloys into bulk material requires relatively low temperature and high pressure, which presents significant processing difficulties. A two-step approach is being explored in our group to reach the goal of a fully dense bulk material. Firstly, cold pressing is used to partially consolidate the powder material and secondly, hot extrusion is used to consolidate the alloy to full density. Process modelling is being used to design the extrusion process, including the extrusion ratio and extrusion length, to limit the temperature increase during extrusion as a result of adiabatic heating, and to avoid excessive heating to limit the undesirable grain growth of the material. A parametric study of extrusion parameters is presented and processing parameters are recommended. The use of process modelling has proven to be a useful tool in understanding the results from the extrusion experiments and limiting the number of interactions during extrusion.

You might also be interested in these eBooks
Metastable and Nanostructured Materials III View Preview

Info:

Periodical:

Materials Science Forum (Volume 570)

Pages:

97-102

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.570.97

Citation:

Cite this paper

Online since:

February 2008

Authors:

M.M. Peres, J.B. Fogagnolo, Alberto Moreira Jorge, Claudio Shyinti Kiminami, Walter José Botta Filho, Claudemiro Bolfarini

Keywords:

Consolidation, Finite Element Analysis (FEA), Nanostructured Powder Material

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2008 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Zhou, J. C., Huang, B. Y. and Wu, E. X., J. Mat. Proc. Tech., 2003, 127 (1-3), 21.

Google Scholar

[2] So, H., Li, W. C., Hsieh, H. K., J. Mat. Proc. Tech., 2001, 114 (1), 18.

Google Scholar

[3] Ariffin, A. K., Gethin, D. T., and Lewis, R. W., Powder Metall., 1998, 41(3), 189.

Google Scholar

[4] Shima, P, Int. J. Powder Metall., 2002, 38(2), 41.

Google Scholar

[5] Cedergren, J., Sorensen, N. J., and Bergark, A., 2002, Three-dimensional Analysis of Compaction of Metal Powder,: Mechanics of Materials, 34, pp.43-59.

DOI: 10.1016/s0167-6636(01)00090-4

Google Scholar

[6] A.F. Castle and T. Sheppard, Hot Working Theory Applied to Extrusion of Some Aluminum Alloys, Met Technol., 1976, 3 (10), (1976).

Google Scholar

[7] Choquet, P., LeBon, A., Rossard, C., Perdrix, C. and Joannes, G.: Thermec-88, I. Tamura, ed., ISIJ, Tokyo, 1998, 2, 729.

Google Scholar

[8] Teodosiu, C., Nicolae, V., Soós, E. and Radu, C.G.: Ver. Roum. Sci. Thechnol. -Mech. Appl., 1979, 24, 13.

Google Scholar

[9] Laasraoui, A. and Jonas, J.J., Metall. Trans A, 1991, 22A, 1545.

Google Scholar