Blar i NTNU Open på forfatter "Holmedal, Bjørn"
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Tensile bond strength of cold roll bonded aluminium sheets
Govindaraj, Nagaraj Vinayagam; Lauvdal, Steinar; Holmedal, Bjørn (Journal article; Peer reviewed, 2013)Sheets of AA1200 and AA3103 aluminium alloys were roll bonded at room temperature and the bond strength across the interface was tested in tension mode. Aluminium rods were glued to the two faces of a coin sample machined ... -
The Effect of Deformation by Torsion and Subsequent Heat Treatment on the Microstructure of AA6082
Hjorth, Andreas Strande (Master thesis, 2018)An AA6082-aluminum alloy is used in the production of suspension components for cars at Raufoss Technology AS. The components are manufactured through a process of several forming and heating steps. Through torsion testing ... -
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 ... -
The Effect of Exposure to Elevated Temperature on the Mechanical Properties of age hardenable AlMgSiCu-Alloys
Andersen, Ida Lægreid (Master thesis, 2019)Med et økt behov for lette, sterke materialer for bilindustrien, kommer også et økt behov for kunnskap om de mekaniske egenskapene til disse materialene. Det er godt kjent at utherdbare aluminiumlegeringer har høy styrke ... -
The effect of heat treatments on the formation of intermetallic compounds in clad composites of Al-Mg alloys and steel grades
Stanikzai, Mustafa (Master thesis, 2019)Denne masteroppgaven undersøker formasjon av intermetalliske komponenter i aluminium- og stålsammensetninger. Aluminiumslegeringer AA6082 og AA5083 ble kaldvalset med to typer stållegeringer: 316L og 355. Dimensjonene av ... -
The effect of silicon on the strengthening and work hardening of aluminum at room temperature
Zhao, Qinglong; Holmedal, Bjørn (Journal article; Peer reviewed, 2013)Solution hardening of Al–Si alloys at room temperature was investigated by tensile tests of several aluminum alloys containing various amounts of Si in solution but fabricated from the same commercially pure base material. ... -
The influence of Mn, Fe and Si on the work hardening of aluminum alloys
Zhao, Qinglong (Doktoravhandlinger ved NTNU, 1503-8181; 2013:16, Doctoral thesis, 2013)The relationship between the processing, the structure and the properties is a key issue of materials science research. The improvement of the properties and optimization of the process always requires a better understanding ... -
The Influence of Transient Change in Strain Rate on Subgrain Size During Deformation by Torsion of AA6063
Rist, Pål (Master thesis, 2016)During hot extrusion a extrusion billet s cross section is reduced, altering the metals micro- structure. As the billet is passing through the extrusion die the strain rate and temperature increases, resulting in a with a ... -
Thermomechanical processing of an AA6082 - IF steel cold roll bonded composite material
Solhaug, Harald (Master thesis, 2017)The work carried out in this thesis was conducted to investigate thermomechanical aspects of a steel-aluminum cold roll bonded material. The objective was to study different production parameters related to ageing of an ... -
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)The deformation texture and its through-thickness heterogeneity for an extruded round profile are experimentally measured by the electron back-scatter diffraction technique (EBSD), and numerically modelled by coupling FEM ... -
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)The deformation texture and its through-thickness heterogeneity for an extruded round profile are experimentally measured by the electron back-scatter diffraction technique (EBSD), and numerically modelled by coupling FEM ... -
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 ... -
Varmtorsjonstesting av 3xxx-legeringer
Jensen, Lars Emil (Master thesis, 2014)Styrkeeffekten av dispergerte partikler har blitt utforsket for en 3xxx-legering ved varmtorsjons-testing. Legeringens komposisjon var: 0,97wt.% Mn, 0,5wt.% Fe, 0,15wt.% Si og 0,05wt.% annet. Det er gjort fire forskjellige ... -
Welding and Mechanical Testing of Aluminium Alloys for use in Constructions
Thorstensen, Lavran (Master thesis, 2023)Målet med denne masteroppgaven er å produsere Al-Si-Mg legeringer til bruk i store konstruksjoner, samtidig som styrken ikke skal bli redusert i noen særlig grad som følge av sveising. Metallplater har gått gjennom ulike ... -
Work hardening and Portevin-Le Chatelier (PLC) effect in aluminium alloys
Sigvaldsen, Øystein Remmem (Master thesis, 2019)Bruk av enkelte Al-Mg-legeringer kan føre til utfordringer. Innenfor visse tøyningshastigheter og temperaturer kan det oppstå overflatefeil og tap av mekaniske egenskaper. Dette på grunn av Portevin-Le Chatelier-effekten. ... -
Work hardening and Portevin-Le Chatelier (PLC) effect in aluminium alloys
Sigvaldsen, Øystein Remmem (Master thesis, 2018)Mechanical testing and microstructure characterization of an AA5182 alloy is performed for use as input for calibration and further development of models for work hardening and dynamic strain aging effects. The experimental ...