Browsing SINTEF Open by Author "Holmedal, Bjørn"
Now showing items 1-17 of 17
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Assessment of advanced Taylor models, the Taylor factor and yield-surface exponent for FCC metals
Zhang, Kai; Holmedal, Bjørn; Manik, Tomas; Saai, Afaf (Journal article; Peer reviewed, 2019)High-resolution crystal plasticity-finite element method (CPFEM) simulations are performed to provide new reference values of the Taylor factor M and the isotropic yield surface exponent for high stacking fault energy ... -
Deformation Texture Evolution in Flat Profile AlMgSi Extrusions: Experiments, FEM, and Crystal Plasticity Modeling
Manik, Tomas; Marthinsen, Knut; Zhang, Kai; Imani Aria, Arash; Holmedal, Bjørn (Peer reviewed; Journal article, 2021)In the present work, the deformation textures during flat profile extrusion from round billets of an AA6063 and an AA6082 aluminium alloy have been numerically modeled by coupling FEM flow simulations and crystal plasticity ... -
Detailed investigation of the shearing mechanism of β" precipitates in Al-Mg-Si alloys
Christiansen, Emil; Marioara, Calin Daniel; Ringdalen, Inga Gudem; Bjørge, Ruben; Holmedal, Bjørn; Hopperstad, Odd Sture; Holmestad, Randi (Peer reviewed; Journal article, 2020)The mechanism behind shearing of β'' precipitates in Al-Mg-Si alloys during deformation is investigated by applying advanced transmission electron microscopy (TEM) techniques and frozen phonon multislice TEM image simulations ... -
Effect of cyclic ageing on the early-stage clustering in Al–Zn-Mg(-Cu) alloys
Shah, Sohail; Thronsen, Elisabeth; Hatzoglou, Constantinos; Wenner, Sigurd; Marioara, Calin Daniel; Holmestad, Randi; Holmedal, Bjørn (Peer reviewed; Journal article, 2022)The cyclic application of mechanical stress to aluminum alloys at room temperature, referred to as cyclic ageing, continuously injects vacancies, enabling dynamic precipitation of a fine distribution of solute clusters. ... -
EVOLUTION IN TEXTURE AND ITS THROUGH-THICKNESS VARIATIONS IN Al-Mg-Si-EXTRUSIONS: EXPERIMENTS AND MODELLING.
Zhang, Kai; Marthinsen, Knut; Holmedal, Bjørn; Aukrust, Trond; Segatori, Antonio (Chapter, 2018) -
An improved modelling framework for strength and work hardening of precipitate strengthened Al–Mg–Si alloys
Lu, Feng; Sunde, Jonas Kristoffer; Marioara, Calin Daniel; Holmestad, Randi; Holmedal, Bjørn (Peer reviewed; Journal article, 2022)A modelling framework for the strength and work hardening contributions in age hardened Al–Mg–Si alloys is presented. The modelling work is based on transmission electron microscopy (TEM) measurements of the needle-shaped ... -
In-situ X-ray microtomography of interface between additively manufactured aluminium bronze and H13 tool steel
Linga, Håkon; Zhang, Yubin; Brøtan, Vegard; Ren, Xiaobo; Westermann, Ida; Holmedal, Bjørn (Peer reviewed; Journal article, 2022)Directed energy deposition (DED) is an additive manufacturing process category where material is melted as it is deposited, often powder melted with a focused laser. In this work aluminium bronze was deposited onto H13 ... -
Influence of dispersoids on microstructure evolution and work hardening of aluminium alloys during tension and cold rolling
Zhao, Qinglong; Holmedal, Bjørn; Li, Yanjun (Peer reviewed; Journal article, 2013)The influence of dispersoids on work hardening of aluminium during tension and cold rolling has been studied by comparing Al–Mn alloys containing similar amounts of solutes but various dispersoid densities. The microstructure ... -
Linking mechanical properties to precipitate microstructure in three Al-Mg-Si(-Cu) alloys
Sunde, Jonas Kristoffer; Lu, Feng; Marioara, Calin Daniel; Holmedal, Bjørn; Holmestad, Randi (Peer reviewed; Journal article, 2021)The mechanical properties of age hardenable Al alloys depend strongly on the precipitate microstructure. This work has investigated the relationship between properties such as strength and ductility and the distribution ... -
Modelling and experimental validation of microstructure evolution during the cooling stage of homogenization heat treatment of Al-Mg-Si alloys
Du, Qiang; Jia, Lina; Tang, Kai; Holmedal, Bjørn (Journal article, 2018)A CALPHAD-coupled multi-component multi-phase Kampmann–Wagner Numerical modelling framework has been adapted and coupled with a homogenization model to predict the competitive nucleation and growth of multi-sized ... -
Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy
Christiansen, Emil; Marioara, Calin Daniel; Holmedal, Bjørn; Hopperstad, Odd Sture; Holmestad, Randi (Journal article; Peer reviewed, 2019)This paper compares the nano-scale structure of β” precipitates in a peak-aged Al-Mg-Si alloy before and after deformation. Three complementary advanced transmission electron microscopy techniques are used to reveal the ... -
On the Use of a Cluster Identification Method and a Statistical Approach for Analyzing Atom Probe Tomography Data for GP Zones in Al–Zn–Mg(–Cu) Alloys
Shah, Sohail; Thronsen, Elisabeth; de gauser, Frederic; hatzoglou, constantinos; Marioara, Calin Daniel; Holmestad, Randi; Holmedal, Bjørn (Peer reviewed; Journal article, 2023)Early-stage clustering in two Al–Mg–Zn(–Cu) alloys has been investigated using atom probe tomography and transmission electron microscopy. Cluster identification by the isoposition method and a statistical approach based ... -
Precipitation and strengthening modeling for disk-shaped particles in aluminum alloys: Size distribution considered
Li, Yue; Holmedal, Bjørn; Li, Hongxiang; Zhuang, Linzhong; Zhang, Jishan; Du, Qiang (Peer reviewed; Journal article, 2018)For an ICME (Integrated Computational Material Engineering) modeling framework used for the age-hardening aluminum alloy design and heat treatment parameters optimization, it is critical to take into account the geometric ... -
Precipitation of Non-Spherical Particles in Aluminum Alloys Part I: Generalization of the Kampmann–Wagner Numerical Model
Holmedal, Bjørn; Osmundsen, Elisa; Du, Qiang (Peer reviewed; Journal article, 2015)Particles precipitated during aging treatments often have non-spherical shapes, e.g., needles or plates, while in the classical Kampmann–Wagner Numerical (KWN) precipitation model, it is assumed that the particles are of ... -
The Effect of Elastic Strain and Small Plastic Deformation on Tensile Strength of a Lean Al–Mg–Si Alloy
Mørtsell, Eva Anne; Westermann, Ida; Marioara, Calin Daniel; Pedersen, Ketill Olav; Andersen, Sigmund Jarle; Røyset, Jostein; Holmedal, Bjørn; Holmestad, Randi (Journal article; Peer reviewed, 2019)Al–Mg–Si alloys are usually formed into their final shape by rolling or extrusion. After extrusion, the aluminium profiles are usually straightened, causing the material to be subjected to a small plastic deformation. This ... -
Through thickness variations of deformation texture in round profile extrusions of 6063-type aluminium alloy: Experiments, FEM and crystal plasticity modelling
Zhang, Kai; Marthinsen, Knut; Holmedal, Bjørn; Aukrust, Trond; Segatori, Antonio (Journal article; Peer reviewed, 2018) -
Towards high-throughput microstructure simulation in compositionally complex alloys via machine learning
Li, Yue; Holmedal, Bjørn; Liu, Boyu; Li, Hongxiang; Zhuang, Linzhong; Zhang, Jishan; Du, Qiang; Xie, Jianxin (Peer reviewed; Journal article, 2021)The coupling of computational thermodynamics and kinetics has been the central research theme in Integrated Computational Material Engineering (ICME). Two major bottlenecks in implementing this coupling and performing ...