TY - JOUR

T1 - A new development of four-point method to measure the electrical resistivity in situ during plastic deformation

AU - Saberi, Saeid

AU - Stockinger, Martin

AU - Stoeckl, Christian

AU - Buchmayr, Bruno

AU - Weiss, Helmut

AU - Afsharnia, Reza

AU - Hartl, Karin

N1 - Publisher Copyright: © 2021 The Author(s)

PY - 2021/5/11

Y1 - 2021/5/11

N2 - The presented study introduces a new test method to measure the change of the electrical resistivity in situ during plastic deformation to characterize the deformation behaviour of metals. This investigation is based on a specially developed four- point method, which determines the change in electrical resistance of sheet samples of an aluminium alloy 6062, a copper alloy CW024A and steel DC04 in situ during deformation in a tensile test. Results show that the strain path, the deformation history, the plastic anisotropy as well as the plastic deformation have a significant influence on the electrical resistivity of all investigated materials. Therefore, this technique is universally applicable for all sheet metals, independent of the crystal structure, the electrical and mechanical properties to characterize structural changes during forming. The obtained data can be used for simulations of metal forming processes, e. g. to predict forming limit curves and damage monitoring under service loading.

AB - The presented study introduces a new test method to measure the change of the electrical resistivity in situ during plastic deformation to characterize the deformation behaviour of metals. This investigation is based on a specially developed four- point method, which determines the change in electrical resistance of sheet samples of an aluminium alloy 6062, a copper alloy CW024A and steel DC04 in situ during deformation in a tensile test. Results show that the strain path, the deformation history, the plastic anisotropy as well as the plastic deformation have a significant influence on the electrical resistivity of all investigated materials. Therefore, this technique is universally applicable for all sheet metals, independent of the crystal structure, the electrical and mechanical properties to characterize structural changes during forming. The obtained data can be used for simulations of metal forming processes, e. g. to predict forming limit curves and damage monitoring under service loading.

KW - Electrical resistivity

KW - Four-point method

KW - Plane strain test

KW - Plastic anisotropy

KW - Plastic deformation

KW - Uniaxial tensile test

UR - http://www.scopus.com/inward/record.url?scp=85105863085&partnerID=8YFLogxK

U2 - 10.1016/j.measurement.2021.109547

DO - 10.1016/j.measurement.2021.109547

M3 - Article

VL - 180.2021

JO - Measurement

JF - Measurement

SN - 0263-2241

IS - August

M1 - 109547

ER -