Browsing SINTEF Open by Author "Graff, Joachim Seland"
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A Comparative Investigation of Duplex and Super Duplex Stainless Steels Processed through Laser Powder Bed Fusion
Gargalis, Leonidas; Karavias, Leonidas; Graff, Joachim Seland; Diplas, Spyridon; Koumoulos, Elias P.; Karaxi, Evangelia K. (Peer reviewed; Journal article, 2023)The aim of this paper was to compare duplex (DSS) and super duplex stainless steel processed by laser powder bed fusion (LPBF) based on the process parameters and microstructure–nanomechanical property relationships. Each ... -
High-Rate Epitaxial Growth of Silicon Using Electron Beam Evaporation at High Temperatures
Stange, Marit Synnøve Sæverud; Sunde, Tor Olav Løveng; Dahl-Hansen, Runar Plunnecke; Rajput, Kalpna; Graff, Joachim Seland; Belle, Branson Delano; Ulyashin, Alexander (Peer reviewed; Journal article, 2023)This paper describes the high-rate (~1.5 μm/min) growth of Si films on Si supporting substrates with (100) crystallographic orientation at 600 °C, 800 °C, and 1000 °C in a vacuum environment of ~1 × 10−5 mbar using electron ... -
Investigation of veryintenseD3-band emission in multi-crystalline silicon wafers using electron microscopy and hyperspectral photoluminescence imaging
Thøgersen, Annett; Jensen, Ingvild Julie Thue; Graff, Joachim Seland; Ringdalen, Inga Gudem; Almeida Carvalho, Patricia; Mehl, Torbjørn; Zhu, Junjie; Burud, Ingunn; Olsen, Espen; Søndenå, Rune (Peer reviewed; Journal article, 2022)Defects in high performance multi-crystalline silicon wafers can be detrimental to the lifetime of the solar cell. It is, therefore, important to study and understand the underlying structure and chemical elements present ... -
Novel Powder Feedstock towards Microstructure Engineering in Laser Powder Bed Fusion: A Case Study on Duplex/Super Duplex and Austenitic Stainless-Steel Alloys
Gargalis, Leonidas; Karavias, Leonidas; Graff, Joachim Seland; Diplas, Spyridon; Koumoulos, Elias P.; Karaxi, Evangelia K. (Peer reviewed; Journal article, 2023)Additive manufacturing of Duplex Stainless Steels (DSS) and Super Duplex Stainless Steels (SDSS) has been successfully demonstrated using LPBF in recent years, however, both alloys feature an almost fully ferritic ... -
On the mechanism of Mn(II)-doping in Scandia stabilized zirconia electrolytes
Vøllestad, Einar; Øygarden, Vegar; Graff, Joachim Seland; Sunding, Martin Fleissner; Pietras, John D.; Polfus, Jonathan M.; Fontaine, Marie-Laure (Peer reviewed; Journal article, 2022)Cubic Scandia-stabilized zirconia (ScSZ) is an attractive electrolyte material for solid oxide cells due to its significant ionic conductivity, provided that the phase transition to its rhombohedral polymorph upon cooling ... -
Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technology
Otto, Robert; Brøtan, Vegard; Carvalho, Patricia A.; Reiersen, Magnus; Graff, Joachim Seland; Sunding, Martin Fleissner; Åsebø Berg, Olav; Diplas, Spyridon; Azar, Amin Shahrestani (Peer reviewed; Journal article, 2021)Although various alloy systems have been explored for additive manufacturing (AM) during the past decade, introducing a new alloy remains a challenging task. Most of the materials require iterative builds, for investigating ...