Fabrication and Estimation of an Ultrafine Grained Complex Aluminum Alloy Sheet by the ARB Process Using Dissimilar Aluminum Alloys

Abstract A multi-layered complex aluminum alloy was successfully fabricated by three-layer stack accumulative roll bonding(ARB) process. The ARB using AA1050 and AA5052 alloy sheets was performed up to 7 cycles at ambient temperature without lubrication. The specimen processed by the ARB showed a multi-layer aluminum alloy sheet in which two aluminum alloys are alternately stacked. The grain size of the specimen decreased with the number of ARB cycles, became about 350nm in diameter after 7cycles. The tensile strength increased with the number of ARB cycles, after 6c it reached 281MPa which is about twice higher than that of the starting material. The microstructures and mechanical properties of a three-layer AA1050/AA5052 alloy fabricated by the ARB were compared to those of the conventional ARB-processed material.

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A Study on Thermal Conductivity and Mechanical Properties of Al-Zn-Mg Aluminum Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.724.169 ◽

2012 ◽

Vol 724 ◽

pp. 169-172

Author(s):

Je Sik Shin ◽

Se Hyun Ko ◽

Ki Tae Kim

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Electrical Conductivity ◽

Aluminum Alloy ◽

Aluminum Alloys ◽

Precipitation Hardening ◽

Alloy Sheet ◽

Aluminum Alloy Sheet ◽

High Electrical Conductivity ◽

Conductivity Loss

In this paper, it was aimed to develop a new Al-Zn-Mg base aluminum alloy having high electrical conductivity, strength, and formability simultaneously. As a result, Al-Zn-Mg base low aluminum alloy sheet can be effectively strengthened without significant thermal conductivity loss by multiply alloying precipitation hardening elements and properly controlling production process parameters.

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Texture and Correlation between R-Value and Formability of Aluminum Alloy Sheet

Materials Science Forum ◽

10.4028/www.scientific.net/msf.702-703.356 ◽

2011 ◽

Vol 702-703 ◽

pp. 356-359

Author(s):

Ni Tian ◽

Gang Zhao ◽

Bo Nie ◽

Jian Jun Wang ◽

Liang Zuo ◽

...

Keyword(s):

Aluminum Alloy ◽

Aluminum Alloys ◽

Pure Aluminum ◽

Alloy Sheet ◽

The Other ◽

Second Phase ◽

Aluminum Alloy Sheet ◽

Plastic Strain Ratio ◽

N Value ◽

R Value

The texture, microstructure, plastic strain ratio r value, elongation, strain hardening index n, the value of cupping test IE, and the correlation between r value and the other formability indices of two automotive aluminum alloys sheet 6016 and 6181, and commercial pure aluminum sheet were investigated. The results showed that the recrystallization textures of three aluminum alloys sheet are similar to each other, which mainly contain cube component. However, the r and n value, elongation, and IE of three aluminum alloys sheet are different from each other evidently, and there is no correlation between texture and r value, and the other formability indices except the n value. The large quantity of second-phase particles in the aluminum alloy matrix has very important effect on both the r value and the formability of aluminum alloy sheet.

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