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Dominik Keller, Axel Monney, Timo Schudeleit and Konrad Wegener
Additive manufacturing processes are among the most innovative manufacturing processes of this century. Powder-based direct metal deposition (DMD) is one of these processes. In the DMD process, local shielding takes place via the powder nozzle. The proce...
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Christian Diegel, Thorsten Mattulat, Klaus Schricker, Leander Schmidt, Thomas Seefeld, Jean Pierre Bergmann and Peer Woizeschke
Background. Spatter formation at melt pool swellings at the keyhole rear wall is a major issue for laser deep penetration welding at speeds beyond 8 m/min. A gas nozzle directed towards the keyhole, that supplies shielding gas locally, is advantageous in...
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Bishal Silwal, Niraj Pudasaini, Sougata Roy, Anthony B. Murphy, Andrzej Nycz and Mark W. Noakes
Wire arc additive manufacturing (WAAM) is the process by which large, metallic structures are built, layer-by-layer, using a welding arc to melt wire feedstock. In this process, the proper selection of the shielding gas plays a vital role in the achievem...
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Victor Dyomin, Igor Semiletov, Denis Chernykh, Elena Chertoprud, Alexandra Davydova, Nikolay Kirillov, Olga Konovalova, Alexey Olshukov, Aleksandr Osadchiev and Igor Polovtsev
The paper presents the results of in situ studies of marine particles of different nature using a submersible digital holographic camera (DHC) during the Arctic expedition. It also describes the features, performance specifications, and possibilities of ...
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Jorge Gil, Abílio de Jesus, Maria Beatriz Silva, Maria F. Vaz, Ana Reis and João Manuel R. S. Tavares
Metallic additive manufacturing processes have been significantly developed since their inception with modern systems capable of manufacturing components for structural applications. However, successful processing through these methods requires extensive...
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João Roberto Sartori Moreno, Celso Alves Corrêa, Elisangela Aparecida da Silva Lizzi, Émillyn Ferreira Trevisani Olivio, Paulo Sergio Olivio Filho, Ana Carla Santos da Silva, Tiago Felipe de Abreu Santos
Pág. e49807
The objective of this study was to analyze the flux-cored arc welding (FCAW) welding parameters and microhardness levels on surface quality of 410 NiMo martensitic stainless-steel coatings. The parameters of the FCAW process applied to the coating, inclu...
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Leander Schmidt, Klaus Schricker, Jean Pierre Bergmann and Christina Junger
Spatter formation is a major issue in deep penetration welding with solid-state lasers at high welding speeds above 8 m/min. In order to limit spatter formation, the use of local gas flows represents a technically feasible solution. By using the gas flow...
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Yangyu Lu, Qingming Zhang, Yijiang Xue, Wenjin Liu and Renrong Long
Three types of multi-wall shielding were experimentally investigated for their performances under the high-velocity impact of a cm-size cylindrical projectile by using a two-stage light-gas gun. The three shields contained the same two aluminum bumpers b...
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Yinan Li, Xianbao Liu, Zhikang Zhou, Lei Zhang and Zilong Peng
A TiN and TiN·Ti2Cu reinforced copper matrix composite layer was cladded onto a T3 copper substrate to improve the anti-wear performance of copper products by means of the nitrogen-shielded gas tungsten arc cladding method (N2-GTAC). Better than the trad...
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Gezekile Nyalunga, Vishana Naicker, Maria du Toit
In recent years, due to economic and social infrastructure development and growth, South Africa has been facing growth in energy demand. Addressing this demand includes building more coal power stations, however with attention paid in designing them to r...
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