Blar i Institutt for konstruksjonsteknikk på forfatter "Marthinsen, Knut"
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Dynamic strain ageing in an AlMg alloy at different strain rates and temperatures: Experiments and constitutive modelling
Xu, Jianbin; Holmedal, Bjørn; Hopperstad, Odd Sture; Manik, Tomas; Marthinsen, Knut (Peer reviewed; Journal article, 2022)Uniaxial tension tests at strain rates from to and temperatures from 298 to 418 K are performed to study the dynamic strain ageing (DSA) of an AA5182-O sheet. Digital image correlation (DIC) is used to obtain the stress-strain ... -
Experimental Characterization and Modelling of the PLC Effect in an AlMg-Alloy
Xu, Jianbin; Holmedal, Bjørn; Hopperstad, Odd Sture; Marthinsen, Knut (Peer reviewed; Journal article, 2021)In the present work, uniaxial tension tests have been conducted to study the mechanical response of a commercial Al4.5wt%Mg alloy (AA5182). The measurements range from the strain rate of 10-4 to 100 s-1 at room temperature. ... -
Lattice rotations in precipitate free zones in an Al-Mg-Si alloy
Christiansen, Emil; Marioara, Calin Daniel; Marthinsen, Knut; Hopperstad, Odd Sture; Holmestad, Randi (Journal article; Peer reviewed, 2018)Scanning precession electron diffraction and automated crystal orientation mapping in a transmission electron microscope (TEM) have been applied to quantitatively study the crystal orientation of precipitate free zones ... -
On the spatio-temporal characteristics of the Portevin-Le Chatelier effect in aluminium alloy AA5182: An experimental and numerical study
Xu, Jianbin; Hopperstad, Odd Sture; Holmedal, Bjørn; Berstad, Torodd; Manik, Tomas; Marthinsen, Knut (Peer reviewed; Journal article, 2023)The Portevin–Le Chatelier (PLC) effect and its spatio-temporal characteristics in the aluminium alloy AA5182 are studied experimentally and numerically in the current work. An extremely high-frequency camera (up to 1000 ... -
A simple method enabling efficient quantitative analysis of the Portevin–Le Chatelier band characteristics
Xu, Jianbin; Liu, Lei; Hopperstad, Odd Sture; Holmedal, Bjørn; Manik, Tomas; Marthinsen, Knut (Peer reviewed; Journal article, 2022)Localized deformation bands are often observed in materials exhibiting the Portevin–Le Chatelier (PLC) effect. However, efficient quantitative analysis of PLC bands remains challenging. A novel method is thus proposed in ...