Blar i NTNU Open på forfatter "Roven, Hans Jørgen"

Achieving dispersed fine soft Bi particles and grain refinement in a hypermonotectic Al-Bi alloy by severe plastic deformation and annealing

Zha, Min; Yu, Zhiyuan; Qian, Feng; Wang, Huiyuan; Li, Yanjun; Mathiesen, Ragnvald; Roven, Hans Jørgen (Journal article; Peer reviewed, 2018)

The present work revealed that equal-channel angular pressing (ECAP) deformation combined with appropriate annealing could represent as an efficient route to modify immiscible as-cast microstructure of a monotectic Al–8Bi ...

Achieving ultrahigh strength in binary Al-10Mg alloy through heavy cryogenic rolling

Liu, Zhibo; Lin, Yaojun; Yan, Zhigang; Liu, Manping; Liu, Xiaochun; Sun, Jiani; Roven, Hans Jørgen (Peer reviewed; Journal article, 2022)

Al-Mg alloys with high Mg contents have attracted considerable interest given enhanced strength and simultaneously reduced density by high Mg solute concentrations. In the present study, we proposed a strategy of strengthening ...

Aluminium Recycling Pre-treatments: Compaction and Thermal De-coating

Olivares, Alicia Vallejo (Doctoral theses at NTNU;2024:103, Doctoral thesis, 2024)

Due to their light weight and versatility, aluminium alloys are found everywhere around us, from food packaging to aerospace applications. Aluminium recycling saves substantial amounts of energy, resources, and waste ...

Aluminum alloys as reinforcement in concrete constructions: Opportunities and Challenges

Runningen, Ingvild (Master thesis, 2021)

Abstract will be available on 2024-06-17

Aluminum weld metal inoculation by Ti/TiB2/TiC additions to screw extruded filler wires

Kirkbakk, Kjell Martin (Master thesis, 2022)

Nylig utviklede metoder har gjort det mulig å produsere Al-TiC nanokompositt-sveisetråder som fører til økt kornforfining i sveisemetallet. Dette reduserer tilbøyeligheten til varmsprekking i de utherdbare aluminiumslegeringene, ...

Application of EBSD technique to ultrafine grained and nanostructured materials processed by severe plastic deformation: Sample preparation, parameters optimization and analysis

Chen, Yongjun; Hjelen, Jarle; Roven, Hans Jørgen (Journal article; Peer reviewed, 2012)

With the help of FESEM, high resolution electron backscatter diffraction can investigate the grains/subgrains as small as a few tens of nanometers with a good angular resolution (∼0.5°). Fast development of EBSD speed (up ...

Applications of screw extrusion for pure aluminium and aluminium foils

Værnes, Martin Storli (Master thesis, 2018)

This thesis has assessed the effect of the screw extrusion process on a super pure aluminium Ø 3mm wire. This thesis also determined that commercial quality aluminium foil can be screw extruded using the prototype found ...

Characterisation of an aluminium matrix nanocomposite wire manufactured by screw extrusion

Ragnvaldsen, Olav (Master thesis, 2019)

Kontinuerleg skrueekstrusjon av metaller (Metal Continuous Scew Extrusion, MCSE) er ein nyutvikla, fast tilstands produksjonsmetode, som tilrettelegg for framstilling av metallegeringar og komposittar med nye eigenskapar. ...

Characterisation of Feed and Produced Material in Screw Extrusion of Titanium

Meling, Jan Inge Hammer (Master thesis, 2016)

A novel method of extrusion of materials with high viscosity is being developed at NTNU, the method is based on screw extrusion, which is more known in the plastic industry. The process, at the end of the development cycle ...

Characterization and Mechanical Testing of Co-Extruded Rods with an AA6082 Core and Rapidly Solidified AA7090/AA7090-Sc Sleeve

Bjerkestrand, Vegard Jørgenvåg (Master thesis, 2018)

The development and implementation of materials having a combination of mechanical properties, e.g. high strength and high ductility, have been of interest within the material science community for decades. In the growing ...

Characterization and Optimization of AlSi10Mg-Components Produced by Selective Laser Melting

Holm, Håkon Dehli (Master thesis, 2018)

The additive manufacturing process known as selective laser melting (SLM) produces metallic parts directly from a computer aided design (CAD)-model, by selectively melting metallic powder particles together in a layer-by-layer ...

Characterization of Aluminium Components Produced by Additive Manufacturing

Rønneberg, Tobias (Master thesis, 2016)

Additive manufacturing (AM) is a new method of manufacturing that can produce physical objects directly from CAD-models. Powder Bed Fusion (PBF) technology can produce metallic parts by selectively fusing powders layer by ...

Characterization of Coextruded Rods with Al-4,5Mg as the Base Alloy and Rapidly Solidified Al-4,5Mg-1Ag as the Surface Alloy

Kalager, Harald (Master thesis, 2017)

Coextruded rods with Al-4,5wt%Mg as the base alloy and rapidly solidified Al-4,5wt%Mg-1wt%Ag as the surface alloy has been characterized. Precipitation hardening, light microscopyand scanning electron microscopy (SEM) ...