Blar i NTNU Open på forfatter "Holmedal, Bjørn"
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Ductility investigation of extruded profiles in an AA6063 alloy
Arntzen, Silje (Master thesis, 2020)I bilindustrien jobbes det konstant mot å finne lettere, sterkere og mer kostnadseffektive materialer til produksjon og prosessering av bildeler. Dette fører til et større krav om kunnskap til materialenes mekaniske ... -
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 ... -
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. ... -
Effect of Fe and Si content in Aluminium Alloys as a result of increased recycling: Testing of high purity Aluminium Alloys in uniaxial tension
Slagsvold, Marius (Master thesis, 2011)The recycling of aluminium from used aluminium scrap leads to an unavoidable presence of pollutions in the form of elements of various amounts. Two such elements are iron and silicon. These will always be present to some ... -
Elaboration of colored gold alloys for jewelry and watchmaking fields
Dussuet, Charlotte (Master thesis, 2022)Abstract will be available on 2025-03-18 -
Evolution in Mechanical Behaviour in a Rolled 3xxx Aluminium Alloy during Lacquering
Underhaug, Kristine Meling (Master thesis, 2020)Arbeidet i denne masteroppgaven ble utført for å undersøke en mulig herdene effekt i plater av en 3xxx aluminium legering etter en lakkeringsprosess. Hensikten var å undersøke endringen i mekanisk adferd og hvordan materialet ... -
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)The visual appearance and mechanical properties of aluminium alloy extrusions are strongly dependent on the microstructure and texture of the extruded profiles, where the desired microstructure and texture may depend on ... -
The evolution of precipitates in an Al–Zn–Mg alloy
Thronsen, Elisabeth; Shah, Sohail; Hatzoglou, Constantinos; Marioara, Calin Daniel; Wenner, Sigurd; Andersen, Sigmund Jarle; Holmedal, Bjørn; Holmestad, Randi (Peer reviewed; Journal article, 2023)The precipitation sequence in Al–Zn–Mg alloys has been subject to many revisions over the years as more structural details of the early-stage Guinier-Preston (GP) zones and precipitates have been uncovered. To further ... -
An experimental and numerical study of the Portevin-Le Chatelier effect in an AlMg alloy
Xu, Jianbin (Doctoral theses at NTNU;2021:238, Doctoral thesis, 2021) -
Experimental characterization and modeling of aluminum alloy AA3103 for complex single and double strain-path changes
Qin, Jisheng; Holmedal, Bjørn; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2018)The stress-strain behavior of the aluminum alloy AA3103 subjected to single and double strain-path changes (SPCs) is studied experimentally. The experimental program includes compression-tension, tension-tension, rolling-tension ... -
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. ... -
Experimental investigation and modelling of strain-path changes in metals
Qin, Jisheng (Doctoral theses at NTNU;2017:287, Doctoral thesis, 2017) -
Experimental Studies of Cold Roll Bonded Aluminum Alloys
Lauvdal, Steinar (Master thesis, 2011)This master s thesis is based on experimental studies of the parameters influencing cold roll bonding (CRB) of the aluminum alloys AA1200 and AA3103,in the work hardened and annealed condition. The effect on the bond ... -
Fracture modes in naturally aged aluminium alloys and an investigation of accelerated age hardening by incremental stretching
Sørlie, Marie Rønning (Master thesis, 2023)En tidligere undersøkelse av effekten av syklisk elding på 7xxx aluminiumslegeringer fra flate ekstruderte profiler fant at både naturlig elding og visse kombinasjoner av syklisk elding førte til tidlige duktile skjærbrudd ... -
A Full-Field Crystal Plasticity Study on the Bauschinger Effect Caused by Non-Shearable Particles and Voids in Aluminium Single Crystals
Imani Aria, Arash; Holmedal, Bjørn; Manik, Tomas; Marthinsen, Knut (Journal article; Peer reviewed, 2024)In the present work, the goal is to use two-scale simulations to be incorporated into the full-field open software DAMASK version 2.0.3 crystal plasticity framework, in relation to the Bauschinger effect caused by the ... -
Implementasjon av en ny modell for presipitering av kuboide partikler.
Osmundsen, Elisa Ariane (Master thesis, 2013)Målet med dette prosjektet var å implementere en modell for å beskrive hvordan distribusjonen av presipitater endres underveis ved presipitering i aluminiumslegeringer, som kan brukes til alle sideforhold av presipitatnåler. ... -
Implementation of a Precipitation Model for Cylindrical-Shaped Particles
Bjørge, Thomas Vatn (Master thesis, 2020)I de fleste utherdbare legeringer oppstår det partikler av sekundærfaser som ofte er av ikke sfærisk karakter. I Kampmann Wagner Numerical (KWN) modeller som brukes for å forutse partikkeldistribusjoner, er partiklene ... -
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 (Journal article; Peer reviewed, 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 grain subdivision and texture evolution in aluminium alloys during cold rolling
Zhao, Qinglong; Holmedal, Bjørn (Journal article, 2014)Al-Mn alloys containing similar amounts of solutes but various dispersoid densities were cold rolled. The grain subdivision and micro-texture were examined by electron backscatter diffraction and orientation imaging ...