THERMAL SCIENCE

International Scientific Journal

Wen-Yu Qian

,

Yu ChenORCID

FIRST-PRINCIPLES STUDY ON THE MECHANICAL PROPERTIES OF AL2CURU ALLOYS UNDER STRAIN

ABSTRACT
In this paper, the mechanical properties of Al2CuRu were calculated by applying uniaxial strain in the y-direction. Research findings indicate that when the strain reaches -14% or 10%, the mechanical stability condition is not met. Consequently, the present study focused exclusively on the mechanical properties of Al2CuRu within the strain range of -13% to 9%. The stress-strain curve of Al2CuRu under uniaxial strain was analysed, revealing that strain applied in the y-direction resulted in significantly greater stress in the y-direction compared to the x- and z-directions. When the strain was between -4% and 2%, the stress-strain curve exhibited a satisfactory linear pattern. However, when the strain exceeds 2% or -4%, a slight non-linear phenomenon becomes evident. It was observed that Al2CuRu exhibited elastic deformation without significant plastic deformation. It was also found that stretching can adjust the elastic modulus of Al2CuRu, reduce its Vickers hardness, and increase its ductility. The elastic modulus has a large range of regulation. The adjustable range of bulk modulus and Young’s modulus exceeds 160 GPa. The Al2CuRu has a relatively large range of elastic deformation and is a typical plastic material. It is one of the alternative materials for the super elastic alloy family. It is therefore concluded that the mechanical properties of Al2CuRu can be regulated by applying uniaxial strain, thus expanding the application range of Al2CuRu materials.
KEYWORDS
fist-principles, mechanical stability, strain, Elastic modulus, Vickers hardness
PAPER SUBMITTED: 2024-06-27
PAPER REVISED: 2025-01-20
PAPER ACCEPTED: 2025-05-22
PUBLISHED ONLINE: 2026-04-12
DOI REFERENCE: https://doi.org/10.2298/TSCI2602047Q
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2026, VOLUME 30, ISSUE No. 2, PAGES [1047 - 1055]
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First-principles study on the mechanical properties of Al2CuRu alloys under strain

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