TY - JOUR

T1 - Evaluating High-Pressure Torsion Scale-Up

AU - Reis, Leonardo M.

AU - Hohenwarter, Anton

AU - Kawasaki, Megumi

AU - Figueiredo, Roberto Braga

N1 - Publisher Copyright: © 2024 Wiley-VCH GmbH.

PY - 2024/2/22

Y1 - 2024/2/22

N2 - Increasing sample dimensions in high-pressure torsion (HPT) processing affects load and torque requirements, deformation distribution, and heating. Finite-element modeling (FEM) and experiments are used to investigate the effect of technical parameters on the scaling up of HPT. Simulations confirm that axial load and torque requirements are proportional to the square and the cube of the sample radius, respectively. The temperature rise also displays a pronounced dependency on the radius. Decreasing the diameter-to-thickness ratio can cause heterogeneity in strain distribution along the thickness direction at the edges of the sample. Such heterogeneity is governed by friction conditions between the material and the lateral wall of the anvil depression. Simulation of HPT processing of ring-shaped samples shows that it is possible to reach more homogeneous distribution of strain and flow stress in the processed material. Experiments using magnesium confirm a tendency for strain localization in the early stage of HPT processing but increasing the number of turns increases the homogeneity of the material. The embodied energy in HPT processing is discussed.

AB - Increasing sample dimensions in high-pressure torsion (HPT) processing affects load and torque requirements, deformation distribution, and heating. Finite-element modeling (FEM) and experiments are used to investigate the effect of technical parameters on the scaling up of HPT. Simulations confirm that axial load and torque requirements are proportional to the square and the cube of the sample radius, respectively. The temperature rise also displays a pronounced dependency on the radius. Decreasing the diameter-to-thickness ratio can cause heterogeneity in strain distribution along the thickness direction at the edges of the sample. Such heterogeneity is governed by friction conditions between the material and the lateral wall of the anvil depression. Simulation of HPT processing of ring-shaped samples shows that it is possible to reach more homogeneous distribution of strain and flow stress in the processed material. Experiments using magnesium confirm a tendency for strain localization in the early stage of HPT processing but increasing the number of turns increases the homogeneity of the material. The embodied energy in HPT processing is discussed.

KW - finite-element modelings

KW - high-pressure torsions

KW - metal formings

KW - severe plastic deformations

UR - http://www.scopus.com/inward/record.url?scp=85186218123&partnerID=8YFLogxK

U2 - 10.1002/adem.202400175

DO - 10.1002/adem.202400175

M3 - Article

AN - SCOPUS:85186218123

VL - 26.2024

JO - Advanced Engineering Materials

JF - Advanced Engineering Materials

SN - 1438-1656

IS - 19

M1 - 2400175

ER -