Blar i Vitenskapelige publikasjoner (TN-IMBM) på forfatter "Tucho, Wakshum Mekonnen"
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Bed packing configuration and hot-spot utilization for low-temperature CO2 methanation on monolithic reactor
Huynh, Huong Lan; Tucho, Wakshum Mekonnen; Shen, Qi; Yu, Zhixin (Peer reviewed; Journal article, 2022)The revival of CO2 methanation (Sabatier reaction) as part of the large-scale Power-to-Gas technology has stimulated the development of novel reactor concepts for better heat management due to its exothermic nature. The ... -
Directed laser deposition of super duplex stainless steel: Microstructure, texture evolution, and mechanical properties
Sayyar, Navid; Hansen, Vidar Folke; Tucho, Wakshum Mekonnen; Minde, Mona Wetrhus (Peer reviewed; Journal article, 2023-04)Microstructure and texture evolution of directed-laser deposited super-duplex stainless-steel, in the as-received block, were characterized using light and electron microscopies and electron backscattered diffraction. ... -
Effect of hydrogen on mechanical properties and fracture of martensitic carbon steel under quenched and tempered conditions
Adasooriya, Mudiyan Nirosha Damayanthi; Tucho, Wakshum Mekonnen; Holm, Erlend; Årthun, Terje; Hansen, Vidar; Solheim, Karl Gunnar; Hemmingsen, Tor (Peer reviewed; Journal article, 2020)The change in the mechanical properties of tempered high strength carbon steel (AISI 4130) due to hydrogen embrittlement (HE) has been investigated using slow strain rate tensile tests (SSRT). The heat treatment processes ... -
The influences of international standards on structural performance and fracture behavior of 3D printed long fiber composite structures
Akessa, Adugna Deressa; Adugna, Yosef Wakjira; Tucho, Wakshum Mekonnen (Peer reviewed; Journal article, 2023)The material properties of the additive manufactured composite structures are usually done following international standards, that show some difference dimensionally. This study focuses on the impact-induced on the tensile ... -
Investigations of Microstructure and Mechanical Properties of 17-4 Ph Ss Printed by Markforged Metal X
Akessa, Adugna Deressa; Tucho, Wakshum Mekonnen; Lemu, Hirpa Gelgele; Grønsund, Jørgen (Peer reviewed; Journal article, 2022-10)The Markforged Metal X (MfMX) printing machine (Markforged Inc., Massachusetts, USA) is one of the latest introduced additive manufacturing (AM) devices. It is getting popular because of its safety, simplicity, and ability ... -
Promoting effect of Fe on supported Ni catalysts in CO2 methanation by in situ DRIFTS and DFT study
Huynh, Huong Lan; Zhu, Jie; Zhang, Guanghui; Shen, Yongli; Tucho, Wakshum Mekonnen; Ding, Yi; Yu, Zhixin (Peer reviewed; Journal article, 2020-12)Bimetallic NiFe catalysts have emerged as a promising alternative to the traditional Ni catalysts for CO2 methanation. However, the promoting effect of Fe on the bimetallic catalysts remains ambiguous. In this study, a ... -
Studies of Post-Fabrication Heat Treatment of L-PBF-Inconel 718: Effects of Hold Time on Microstructure, Annealing Twins, and Hardness
Tucho, Wakshum Mekonnen; Hansen, Vidar Folke (Peer reviewed; Journal article, 2021-02)The widely adopted temperature for solid solution heat treatment (ST) for the conventionally fabricated Inconel 718 is 1100 °C for a hold time of 1 h or less. This ST scheme is, however, not enough to dissolve Laves and ...