Paper Titles
Dry Sliding Wear Characteristics of Severely Deformed 6061 Aluminum and AZ61 Magnesium Alloys
p.597
Effect of PWHT on Behaviors of Precipitates and Hardness Distribution of 6061 Al Alloy Joints by Friction Stir Welding Method
p.601
Rapid Grain Growth of Hot Extruded Al-Zn-Mg-Cu-(Sc) Alloy during Heat Treatment
p.605
Spray Casting of Al-25Si Alloy and Hot Deformation Behavior
p.609
Ultra Grain Refinement and High Strengthening of Al Based MMC by Accumulative Roll Bonding Process
p.613
Effects of Silicon and Chromium on the Fatigue Properties of Al-Zn-Mg-Cu Cast Alloy
p.617
Thermal Properties and Fracture Behavior of Compositionally Graded Al-SiCp Composites
p.621
Microstructural Evolution and Mechanical Properties of Ultrafine Grained Commercially Pure 1100 Aluminum Alloy Processed by Accumulative Roll-Bonding (ARB)
p.625
Wear Behavior of Graphite-Dispersed Al-Sn-Si Alloys
p.629

Ultra Grain Refinement and High Strengthening of Al Based MMC by Accumulative Roll Bonding Process

Article Preview

Abstract:

Aluminum based metal matrix composite (MMC) was processed by accumulative roll bonding (ARB) for ultra grain refinement and high strengthening. The ARB process up to 4 cycles was performed for the composite with 5vol.%SiC at ambient temperature under unlubricated conditions. The ARB of unreinforced aluminum powder compact was also performed for comparison. The tensile strength of the composite increased with the number of ARB cycles, and reached a maximum of 375MPa at the 3rd cycle, which is 1.8 times higher than that of the initial material. An increment of the strength per cycle was much larger in the composite than that in the unreinforced 6061 aluminum powder compact. The elongation of the composite decreased gradually with the number of ARB cycles, became almost zero after 4 cycles. TEM observation revealed that the composites fabricated by 1 to 3 cycles showed a dislocation cell structure, but after 4 cycles it showed an ultra-fine grained structure with mean grain size below 500nm. The ultra-fine grains developed at lower cycles in the composite than in the unreinforced one.

You might also be interested in these eBooks
Designing, Processing and Properties of Advanced Engineering Materials View Preview

Info:

Periodical:

Materials Science Forum (Volumes 449-452)

Pages:

613-616

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.449-452.613

Citation:

Cite this paper

Online since:

March 2004

Authors:

Seong Hee Lee, Chung Hyo Lee, Si Young Chang

Keywords:

Accumulative Roll Bonding Process, Mechanical Property, Metal Matrix Composite (MMC), Ultrafine Grained

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2004 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] V. M. Segal: Mater. Sci. Eng. Vol. A197 (1995), p.157.

Google Scholar

[2] R. Z. Valiev, R.K. Islamgaliev and I.V. Alexandrov: Progress in Materials Science, Vol. 45 (2000), p.103.

Google Scholar

[3] Z. Horita, D. J. Smith, M. Furukawa, M. Nemoto, R. Z. Valiev and T. G. Langdon: J. Mater. Res. Vol. 11 (1996), p.1880.

Google Scholar

[4] Y. Saito, H. Utsunomiya, N. Tsuji and T. Sakai: Acta Mater. Vol. 47 (1999), p.579.

Google Scholar

[5] Y. Saito, N. Tsuji, H. Utsunomiya, T. Sakai and R. G. Hong: Scripta Mater. Vol. 39 (1998), p.1221.

Google Scholar

[6] N. Tsuji, Y. Saito, H. Utsunomiya and S. Tanigawa: Scripta Mater. Vol. 40 (1999), p.795.

Google Scholar

[7] Y. T. Zhu, H. Jiang, J. Huang and T. C. Lowe: Metall. Mater. Trans. Vol. A32 (2001), p.1559.

Google Scholar

[8] S. H. Lee, T. Sakai and Y. Saito, H. Utsunomiya and N. Tsuji: Materials Transactions, JIM, Vol. 40 (1999), p.1422.

Google Scholar

[9] S. H. Lee, Y. Saito, T. Sakai, H. Utsunomiya and N. Tsuji: Mater. Sci., Forum Vol. 331-337 (2000).

Google Scholar