LCF behavior of 2024AA under uni- and biaxial loading taking into account creep pre-deformation

Adam Tomczyk; Andrzej Seweryn

doi:10.1016/j.engfracmech.2024.109867

LCF behavior of 2024AA under uni- and biaxial loading taking into account creep pre-deformation

Abstract

This study presents the results of experimental low-cycle fatigue (LCF) tests of aluminum 2024 alloy T3511 temper in uni- and biaxial loading states. Tests were carried out on both the as-received material (hardened extruded rods) and material with different pre-deformation histories. These deformations were carried out in the creep process at 200 °C and 300 °C for two different levels of at each temperature. The pre-deformed material’s basic fatigue characteristics were determined and compared with the appropriate characteristics of the as-received material. In-depth macro- and microscopic analysis (SEM) of fracture surfaces was done. The effect of preliminary creep on LCF behavior of investigated alloy was characterized for both uni- and biaxial loading. An increase of fatigue life occurs for large plastic strains in the case of cyclic tension/compression. For in-phase biaxial loading, improvement of life is observed only for material with pre-deformation at 300 °C. Crack initiates in the plane of maximum shear strains for both biaxial loading and pure torsion. For tension/compression – in the plane of maximum principal stress (strain).

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Authors (2)

Adam Tomczyk
Andrzej Seweryn prof. dr hab. inż.

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Articles

Type:

artykuły w czasopismach

Published in:

ENGINEERING FRACTURE MECHANICS no. 296,
ISSN: 0013-7944

Language:

English

Publication year:

2024

Bibliographic description:

Tomczyk A., Seweryn A.: LCF behavior of 2024AA under uni- and biaxial loading taking into account creep pre-deformation// ENGINEERING FRACTURE MECHANICS -,iss. 296 (2024), s.109867-

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