Effects of Thermal Exposure on the Mechanical Properties and Microstructure Stability of an Al-Cu-Mg-Ag 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 (σBbB) and yield strength (σBsB) reduced with both increasing exposure time and temperature. When exposed at 150°C, the Al-Cu-Mg-Ag alloy exhibits good structural stability due to the splendid 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 θ phase during thermal exposure.

Info:

Periodical:

Advanced Materials Research (Volumes 97-101)

Edited by:

Zhengyi Jiang and Chunliang Zhang

Pages:

675-678

DOI:

10.4028/www.scientific.net/AMR.97-101.675

Citation:

A. J. Duan et al., "Effects of Thermal Exposure on the Mechanical Properties and Microstructure Stability of an Al-Cu-Mg-Ag Alloy ", Advanced Materials Research, Vols. 97-101, pp. 675-678, 2010

Online since:

March 2010

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Price:

$35.00

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