Finite element analysis of plasticity behaviour of aluminium alloys in high-pressure torsion compressive loading stage
International Journal of Structural Integrity
ISSN: 1757-9864
Article publication date: 23 September 2019
Issue publication date: 23 September 2019
Abstract
Purpose
The purpose of this paper is to examine the plasticity behaviour of aluminium alloys in high-pressure torsion (HPT) compressive loading stage. It is a part of the strengthen lightweight material development through severe plastic deformation.
Design/methodology/approach
A finite element simulation of HPT compression stage by displacement control incremental loading was proposed by taking into account an unconstraint HPT configuration. The quasi-static condition was utilised, by embedding strain hardening plasticity constitutive model and considering frictional effects, to assess the plasticity behaviour of aluminium alloys, particularly AA2024 and AA6082.
Findings
The present investigation clearly indicates that the deviation of material flow as a result of sticking condition of µ⩾0.5, was found to be negligible. An inhomogeneous material flow along the sample radial and thickness direction was evident, producing a stress concentration at the edge of the loaded surface, indicating the anticipated region of failure. The effective plastic strain in the compression stage was also found to be significant. Based on the effective strain response, plasticity behaviour of the compressed sample was predicted.
Originality/value
This paper demonstrates the plasticity behaviour of the analysed aluminium alloys. Since the mechanical properties produced by the deformed material are closely related to the exerted plastic deformation, understanding the phenomenon associated with the plastic strain development is essential. The outcome of this research will assist in seizing the opportunities of improving both material properties and the HPT procedures.
Keywords
Acknowledgements
The author(s) gratefully acknowledges the Malaysia Public Service Department for the Federal Training Award (HLP) scholarship. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 730888.
Citation
Lamin, F., Ahmad Kamal Ariffin, A.K.A. and Mohamed, I.F. (2019), "Finite element analysis of plasticity behaviour of aluminium alloys in high-pressure torsion compressive loading stage", International Journal of Structural Integrity, Vol. 10 No. 5, pp. 692-703. https://doi.org/10.1108/IJSI-04-2019-0037
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited