Using finite element modelling to examine the flow process and temperature evolution in HPT under different constraining conditions

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Pereira, P.H.R.^1 ; Figueiredo, R.B.^2 ; Cetlin, P.R.^3 ; Langdon, T.G.^1,4

Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, United Kingdom^1

Department of Materials Engineering and Civil Construction, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil^2

Department of Mechanical Engineering, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil^3

Departments of Aerospace and Mechanical Engineering and Materials Science, University of Southern California, Los Angeles CA 90089-1453, United States^4

关键词: Constrained conditions;    Finite element modelling;    Finite element simulations;    High hydrostatic pressure;    High pressure torsions;    Severe plastic deformations;    Strain distributions;    Temperature evolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012041/pdf
DOI  :  10.1088/1757-899X/63/1/012041

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

High-pressure torsion (HPT) is a metal-working technique used to impose severe plastic deformation into disc-shaped samples under high hydrostatic pressures. Different HPT facilities have been developed and they may be divided into three distinct categories depending upon the configuration of the anvils and the restriction imposed on the lateral flow of the samples. In the present paper, finite element simulations were performed to compare the flow process, temperature, strain and hydrostatic stress distributions under unconstrained, quasi-constrained and constrained conditions. It is shown there are distinct strain distributions in the samples depending on the facility configurations and a similar trend in the temperature rise of the HPT workpieces.