Paper Title:
An Investigation of Cavitation in the Tensile Testing of a Spray-Cast Aluminum Alloy Processed by ECAP
  Abstract

A commercial aluminum 7034 alloy, produced by spray casting and having an initial grain size of ~2.1 μm, was subjected to equal-channel angular pressing (ECAP) through six passes at 473 K. In the as-pressed condition, the microstructure was reasonably homogeneous and the grain size was reduced to an ultrafine grain size of ~0.3 μm. This alloy contains MgZn2 and Al3Zr precipitates which restrict grain growth. In tensile testing at 673 K after processing by ECAP, an elongation of >1000% was achieved at a strain rate of 1.0 × 10-2 s-1 corresponding to high strain rate superplasticity. Quantitative cavity measurements were conducted on the specimens after tensile testing for both the as-received condition and after ECAP. These measurements reveal a significant number of small cavities in the samples and especially in the sample that exhibited a very high elongation. This paper describes the morphology of cavity development in the spray-cast aluminum alloy in both the as-received and as-pressed condition.

  Info
Periodical
Materials Science Forum (Volumes 503-504)
Edited by
Zenji Horita
Pages
83-90
DOI
10.4028/www.scientific.net/MSF.503-504.83
Citation
M. Kawasaki, C. Xu, T. G. Langdon, "An Investigation of Cavitation in the Tensile Testing of a Spray-Cast Aluminum Alloy Processed by ECAP", Materials Science Forum, Vols. 503-504, pp. 83-90, 2006
Online since
January 2006
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: Marco J. Starink, Shun Cai Wang, Nong Gao, H. Singh Ubhi, Cheng Xu, Terence G. Langdon
Abstract:The texture and grain boundary evolution during equal channel angular pressing (ECAP) of a spray-cast Al-7034 (Al-Zn-Mg-Cu) alloy containing...
937
Authors: Yoshimasa Takayama, Y. Otsuka, Toshiya Shibayanagi, Hajime Kato, Kunio Funami
Abstract:Grain refinement and high temperature deformation in two kinds of magnesium alloys subjected to friction stir processing (FSP) have been...
55
Authors: Takashi Mizuguchi, Rintaro Ueji, Hayato Miyagawa, Yasuhiro Tanaka, Kazunari Shinagawa
Chapter 18: Steels
Abstract:The fracture behavior transition due to the change of strain rate in 5%Si magnetic steel with dislocation microstructures was studied. The Si...
2187
Authors: Shao Feng Zeng, Kai Huai Yang, Wen Zhe Chen
Chapter 7: Transmission and Control of Fluid
Abstract:Equal channel angular pressing (ECAP) was applied to a commercial AZ61 magnesium alloy for up to 8 passes at temperatures as low as 473K....
2124