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    • Strain controlled medium cycle fatigue of a notched Pb-Sn-Cd lead alloy 

      Viespoli, Luigi Mario; Johanson, Audun; Alvaro, Antonio; Nyhus, Bård; Berto, Filippo (Peer reviewed; Journal article, 2019)
      During the extrusion process of subsea power cable sheathing layer it is possible that metallic and/or non-metallic debris present in the processing environment enter the metal lattice originating discontinuities that might ...

    • Strain localization and ductile fracture in advanced high-strength steel sheets 

      Gruben, Gaute; Morin, David; Langseth, Magnus; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2017)
      An experimental-numerical approach is applied to determine the strain localization and ductile fracture of high-strength dual-phase and martensitic steel sheet materials. To this end, four different quasi-static material ...

    • Strategies for the sampling of hydrogen at refuelling stations for purity assessment 

      Arrhenius, Karine; Aarhaug, Thor Anders; Bacquart, Thomas; Morris, Abigail; Bartlett, Sam; Wagner, Lisa; Blondeel, Claire; Gozlan, Bruno; Lescornez, Yann; Chramosta, Nathalie; Spitta, Christian; Basset, Etienne; Nouvelot, Quentin; Rizand, Mathilde (Peer reviewed; Journal article, 2021)
      Hydrogen delivered at hydrogen refuelling station must be compliant with requirements stated in different standards which require specialized sampling device and personnel to operate it. Currently, different strategies are ...

    • Streptomyces tardus sp. nov.: A Slow-Growing Actinobacterium Producing Candicidin, Isolated From Sediments of the Trondheim Fjord 

      Králová, Stanislava; Sandoval-Powers, Megan; Fawwal, Dorelle V.; Degnes, Kristin Fløgstad; Lewin, Anna; Klinkenberg, Geir; Nguyen, Giang-Son; Liles, Mark R.; Wentzel, Alexander (Peer reviewed; Journal article, 2021)
      Marine environments are home to an extensive number of microorganisms, many of which remain unexplored for taxonomic novelty and functional capabilities. In this study, a slow-growing Streptomyces strain expressing unique ...

    • Stress Corrosion Cracking in an Extruded Cu-Free Al-Zn-Mg Alloy 

      Lervik, Adrian; Walmsley, John Charles; Lodgaard, Lars; Marioara, Calin Daniel; Johnsen, Roy; Lunder, Otto; Holmestad, Randi (Peer reviewed; Journal article, 2020)
      Stress corrosion cracking (SCC) in Cu-free Al-Zn-Mg (7xxx) aluminium alloys limits its use in many applications. In this work, we study in detail the microstructure of a peak and slightly overaged condition in an AA7003 ...

    • Stress-strain curves of metallic materials and post-necking strain hardening characterization: A Review 

      Tu, Shengwen; Ren, Xiaobo; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2019)
      For metallic materials, standard uniaxial tensile tests with round bar specimens or flat specimens only provide accurate equivalent stress–strain curve before diffuse necking. However, for numerical modelling of problems ...

    • Structural and Thermal Characterization of Novel Organosolv Lignins from Wood and Herbaceous Sources 

      Trubetskaya, Anna; Lange, Heiko; Wittgens, Bernd; Brunsvik, Anders; Crestini, Claudia; Rova, Ulrika; Christakopoulos, Paul; Leahy, J.J.; Matsakas, Leonidas (Peer reviewed; Journal article, 2020)
      This study demonstrates the effects of structural variations of lignins isolated via an organosolv process from different woody and herbaceous feedstocks on their thermal stability profiles. The organosolv lignins were ...

    • Structural changes in SAPO-34 due to hydrothermal treatment. A NMR, XRD, and DRIFTS study 

      Arstad, Bjørnar; Lind, Anna Maria; Cavka, Jasmina Hafizovic; Thorshaug, Knut; Akporiaye, Duncan; Wragg, David; Fjellvåg, Helmer; Grønvold, Arne; Fuglerud, Terje (Peer reviewed; Journal article, 2016)
      When SAPO-34 is used as an industrial MTO catalyst, structural transformations leading to permanent deactivation are inevitable. The performance loss is linked principally to a redistribution of Si in the material, leading ...

    • Structural Characterization of Natural Quartz by Scanning TEM 

      Busam, Jochen; Wenner, Sigurd; Muggerud, Astrid Marie; Van Helvoort, Antonius (Peer reviewed; Journal article, 2018)
      For quartz, despite its industrial importance and an extensive amount of research done on it, there are still open fundamental questions, e.g. regarding crystal defects, phase changes or damage mechanisms under ionizing ...

    • Structural evolution of water and hydroxyl groups during thermal, mechanical and chemical treatment of high purity natural quartz 

      Gawel, Bartlomiej; Ulvensøen, Anna; Lukaszuk, Katarzyna Anna; Arstad, Bjørnar; Muggerud, Astrid Marie Flattum; Erbe, Andreas (Peer reviewed; Journal article, 2020)
      Fused silica crucibles are commonly used in the fabrication process of solar grade silicon ingots. These crucibles are manufactured from high purity natural quartz sand and as a consequence, their properties are influenced ...

    • Structural investigation of epitaxial LaFeO_3 thin films on (111) oriented SrTiO_3 by transmission electron microscopy 

      Christiansen, Emil; Nord, Magnus Kristofer; Hallsteinsen, Ingrid; Vullum, Per Erik; Tybell, Per Thomas Martin; Holmestad, Randi (Peer reviewed; Journal article, 2015)
      We report on structural domains in LaFeO3 epitaxial thin films on (111) oriented SrTiO3 observed by transmission electron microscopy using low magnification dark field imaging and high resolution transmission electron ...

    • Structural investigation of precipitates with Cu and Zn atomic columns in Al-Mg-Si alloys by aberration-corrected HAADF-STEM 

      Saito, Takeshi; Marioara, Calin Daniel; Andersen, Sigmund Jarle; Lefebvre, Williams; Holmestad, Randi (Peer reviewed; Journal article, 2014)
      Precipitates in Al-Mg-Si alloys with Cu addition (~0.1 wt%) and Zn addition (~1 wt%) were investigated by aberration corrected high angle annular dark field scanning transmission electron microscopy (HAADF-STEM). Most ...

    • Structural modifications and electron beam damage in aluminium alloy precipitate θ'-Al2Cu 

      Wenner, Sigurd; Friis, Jesper; Marioara, Calin Daniel; Andersen, Sigmund Jarle; Holmestad, Randi (Peer reviewed; Journal article, 2015)
      The –AlCu phase in an Al–4Zn–2Cu–1Mg–0.7Si (wt.%) alloy was investigated by means of scanning transmission electron microscopy. With our specific alloy composition, the phase is often formed with stacking faults on and ...

    • Structural properties of mixed conductor Ba1−xGd1−yLax+yCo2O6−δ 

      Strandbakke, Ragnar; Wragg, David Stephen; Sørby, Magnus Helgerud; Guzik, Matylda; Gunnæs, Anette Eleonora; Szpunar, Iga; Wachowski, Sebastian Lech; Balaguer, Maria; Carvalho, Patricia A.; Mielewczyk-Gryń, Aleksandra; Serra, Jose; Norby, Truls (Peer reviewed; Journal article, 2022)
      Ba1−xGd1−yLax+yCo2O6−δ (BGLC) compositions with large compositional ranges of Ba, Gd, and La have been characterised with respect to phase compositions, structure, and thermal and chemical expansion. The results show a ...

    • Structure, electrical conductivity and oxygen transport properties of perovskite-type oxides CaMn1−x−yTixFeyO3−δ 

      Ruhl, Rian; Song, Jia; Thoréton, Vincent; Singh, Sathya Prakash; Wiik, Kjell; Larring, Yngve; Bouwmeester, Henny J. M. (Journal article; Peer reviewed, 2019)
      Calcium manganite-based perovskite-type oxides hold promise for application in chemical looping combustion processes and oxygen transport membranes. In this study, we have investigated the structure, electrical conductivity ...

    • Structure, hydration, and chloride ingress in C-S-H: Insight from DFT calculations 

      Svenum, Ingeborg-Helene; Ringdalen, Inga Gudem; Bleken, Francesca Lønstad; Friis, Jesper; Hoche, Daniel; Swang, Ole (Peer reviewed; Journal article, 2020)
      The structure of Calcium-Silicate-Hydrate (C-S-H) and the effect of variations in its water content have been investigated using density functional theory (DFT) calculations. Trends for calculated densities as a function ...

    • Studies of Ca-based high temperature sorbents for CO2 capture 

      Arstad, Bjørnar; Spjelkavik, Aud I.; Andreassen, Kari Anne; Lind, Anna Maria; Prostak, Joanna; Blom, Richard (Peer reviewed; Journal article, 2013)
      The natural mineral dolomite has been calcined and impregnated with Ti-, Zr-, Al-nanoparticle suspensions with the aim of improving the cyclic stabilities in high temperature CO2 sorption processes. After impregnation and ...

    • Studies on delignification and inhibitory enzyme kinetics of alkaline peroxide pre-treated pine and deodar saw dust 

      Baksi, Sibashish; Sarkar, Ujjaini; Saha, Sudeshna; Ball, Akash K.; Kuniyal, Jagdish Chandra; Wentzel, Alexander; Birgen, Cansu; Preisig, Heinz A.; Wittgens, Bernd; Markussen, Sidsel (Peer reviewed; Journal article, 2019)
      Delignification of lignocellulosic biomass by alkaline peroxide pre-treatment is a preliminary important step for an overall biomass fractionation process. In the present work, saw dusts are pre-treated by aqueous alkaline ...

    • A Study of Bubble Behavior and Anode Effect on the Graphite and Industrial Carbon Anode in a See-Through Furnace During Aluminium Electrolysis 

      Stanic, Nikolina; Martinez, Ana Maria Cuellar; Einarsrud, Kristian Etienne; Sandnes, Espen (Peer reviewed; Journal article, 2022)
      Anode gas bubble behavior and anode effect on graphite and industrial carbon rod-shaped anode in a cryolite melt have been studied using a see-through furnace. The different carbon materials have different properties which ...

    • Study of low-temperature effect on the fracture locus of a 420-MPa structural steel with the edge tracing method 

      Tu, Shengwen; Ren, Xiaobo; Kristensen, Tore Andre; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2018)
      Quasi-static tensile tests with smooth round bar and axisymmetric notched tensile specimens have been performed to study the low-temperature effect on the fracture locus of a 420-MPa structural steel. Combined with a digital ...