Journal of Theoretical
and Applied Mechanics

56, 4, pp. 1055-1068, Warsaw 2018
DOI: 10.15632/jtam-pl.56.4.1055

Monotonic behaviour of typical Al-Cu-Mg alloy pre-strained at elevated temperature

Adam Tomczyk, Andrzej Seweryn, Michał Doroszko
This paper presents results of monotonic tensile and creep tests conducted on typical
Al-Cu-Mg alloy (commercial 2024) specimens. Tensile tests carried out at room (20◦C)
and elevated (100◦C, 200◦C, 300◦C) temperatures made it possible to determine strength
properties of the material (Young’s modulus, yield stress, ultimate tensile strength). Creep
tests were performed at elevated temperature (100◦C, 200◦C and 300◦C) with a constant
force. In order to obtain material creep characteristics, creep-rupture tests were carried out.
Then creep tests were conducted with two different strain values: one corresponding to the
beginning of the secondary creep and the other corresponding to a certain value of the
tertiary creep. After preliminary creep deformation at two various strain levels, specimens
were cooled at ambient temperature and then subjected to monotonic tensile tests. The
characteristics of the material were obtained for pre-strained specimens at different tempe-
ratures. Specimens fracture surfaces obtained as a result of tensile (at elevated and room
temperature), creep and combined tests were analyzed.
Keywords: creep and tensile tests, metals and alloys, scanning electron microscopy, numerical calculations, mechanical properties


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