Effects of Thermal Exposure on Mechanical Properties of Al-4.87Cu-1.2Mg-1.0Ag Alloy

Abstract:

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Mechanical properties and microstructural evolution of an Al-Cu-Mg-Ag alloy during thermal exposure at elevated temperature were characterized by means of tensile tests, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observation. The tensile test results suggested that tensile strength (σb) and yield strength (σs) reduced with both increasing exposure time and temperature. When exposed at 150°C, the Al-4.87Cu-1.2Mg-1.0Ag alloy exhibits good structural stability due to the excellent thermal stability of the Ω phase. SEM results showed that the specimen was fractured in a combined manner of intergranular and transgranular fracture. TEM results suggested the reduction of mechanical properties of samples was attributed to the coarsening of Ω phase and the precipitation of S' phase during thermal exposure.

Info:

Periodical:

Advanced Materials Research (Volumes 189-193)

Edited by:

Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang

Pages:

1031-1035

DOI:

10.4028/www.scientific.net/AMR.189-193.1031

Citation:

A. J. Duan et al., "Effects of Thermal Exposure on Mechanical Properties of Al-4.87Cu-1.2Mg-1.0Ag Alloy", Advanced Materials Research, Vols. 189-193, pp. 1031-1035, 2011

Online since:

February 2011

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Price:

$35.00

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