Paper Title:
Ultra Grain Refinement and High Strengthening of Al Based MMC by Accumulative Roll Bonding Process
  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.

  Info
Periodical
Materials Science Forum (Volumes 449-452)
Edited by
S.-G. Kang and T. Kobayashi
Pages
613-616
DOI
10.4028/www.scientific.net/MSF.449-452.613
Citation
S. H. Lee, C.H. Lee, S. Y. Chang, "Ultra Grain Refinement and High Strengthening of Al Based MMC by Accumulative Roll Bonding Process", Materials Science Forum, Vols. 449-452, pp. 613-616, 2004
Online since
March 2004
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Seong Hee Lee, Seung Zeon Han, Cha Yong Lim
Abstract:Accumulative roll-bonding (ARB) process was applied to an oxygen free copper for improvement of the mechanical properties via ultra grain...
239
Authors: Seong Hee Lee, Tetsuo Sakai, C.H. Lee, Yong Ho Choa
Abstract:Nano-structured aluminum was fabricated by accumulative roll-bonding (ARB) process using different rolling methods. One is the ARB using...
327
Authors: Seong Hee Lee, Si Young Chang, Sung Tag Oh
Abstract:The effect of working temperature on microstructure and mechanical properties of ultrafine grained monolithic Al and Al-5vol.%SiCp composite...
1381
Authors: Seong Hee Lee, Sang Shik Kim, Seung Zeon Han, Cha Yong Lim
Abstract:The effects of strain rate in rolling on microstructures and mechanical properties of a nano-grained high purity copper processed by...
71
Authors: Kun Xia Wei, Wei Wei, Qing Bo Du, Jing Hu
Micro/Nano Materials
Abstract:Usually the heat treatment in the cyclic ARB passes is indispensable to reduce work-hardening effects and improve interface bonding quality....
993