Results 61 to 70 of about 2,939 (187)

Characterisation of defects following MicroCT sampling inspection of specimens produced by electron beam powder bed fusion

Virtual and Physical Prototyping
With the maturation of metal additive manufacturing (AM) technologies, and the evolution of the machine capabilities, the discussions in literature are pivoting towards reliability and quality of the components produced.
Eric Bol, Garrett M. Kelley, M. Ramulu
doaj   +1 more source

Combined Effects of Thermal Cycling Aging and Reinforcement Content on the Ball‐On‐Disk Wear of Additively Manufactured Polylactic Acid Composites

Polymer Composites, EarlyView.
Thermal Aging and Tribological Tests of Additive Manufactured PLA Composites. ABSTRACT This study focuses on the additive manufacturing of pure polylactic acid (PLA) specimens and milled glass fiber (GF)‐filled PLA composites under thermal cycling aging and wear tests. Wear tracks have been analyzed via 3D optical profiling and SEM imaging.
Sinan Fidan, Satılmış Ürgün, Nevin Gamze Karsli, Taner Yilmaz, Mustafa Özgür Bora, Mehmet İskender Özsoy   +5 more
wiley   +1 more source

The Evolution of Crystal Structure in Polypropylene as It Goes From Pellet to Powder to Print in Powder Bed Fusion Additive Manufacturing

Journal of Polymer Science, EarlyView.
Small angle x‐ray scattering provides insight into the change in crystalline structure in polypropylene molecular weight blends as the polypropylene is transformed from commercial pellets to a powder suitable for powder bed fusion (PBF), and then further transformed to a part printed by PBF.
Timothy Taylor, Akan George, Mahmudul Hasan, Jackson Bryant, Michael J. Bortner, Christopher B. Williams, Mark Dadmun   +6 more
wiley   +1 more source

Monitoring melt pool dynamics using multi-detector electron optical imaging

Materials & Design
Experimental observation of the dynamic melt pool evolution in advanced powder bed fusion processes is a challenging endeavor. The main challenge is that the small melt pool dimensions and its fast dynamic evolution require high spatial and temporal ...
Jakob Renner, Erik Granhed, Neeraj Vaswade, Anders Snis, Carolin Körner   +4 more
doaj   +1 more source

Engineering Cobalt‐Based Thin Films for Fischer–Tropsch Synthesis

Small, EarlyView.
Cobalt thin films with tailored crystalline phases and oxidation states serve as well‐defined model Fischer–Tropsch catalysts. In situ synchrotron GIXRD reveals distinct reduction behaviour and phase evolution, while catalytic testing demonstrates phase‐dependent hydrocarbon selectivity and improved structural stability. These model thin‐film catalysts
Muhammad Hamid Raza, Avela Kunene, Alexander Steigert, Athanasios Skaltsogiannis, Catalina E. Jiménez, Florian Ruske, Ali Shan Malik, René Schwiddessen, Judith Helena Mettke, Johannes Frisch, Regan G. Wilks, Erik Reichelt, Marcus Bär, Rutger Schlatmann, Daniel Amkreutz   +14 more
wiley   +1 more source

Powder bed fusion of AlSi10Mg using an electron beam: Processability, microstructure and mechanical properties

, 2023
Abstract Powder bed fusion additive manufacturing processes of metals using an electron beam (PBF-EB/M) and laser beam (PBF-LB/M) are methods for producing complex near-net-shape parts layer upon layer, which are standardized in DIN EN ISO/ASTM 52900.
Ortmann, Robert, Kretzer, Nele, Grimm, Tobias, Sehrt, Jan T.   +3 more
openaire   +1 more source

Regulating Copper Nuclearity in Metal–Organic Frameworks for the Hydrogenation of Carbon Dioxide

Small Methods, EarlyView.
CO2 hydrogenation on Cu‐metalated MOFs at gas–solid and liquid–solid interfaces depend strongly on the nuclearity of the Cu, which can be adjusted via the density of defects and the synthesis process. In both reaction regimes, methanol formation is favored on Cu clusters rather than on isolated Cu sites, highlighting the critical role of metal ...
Soufiane Bahou, Chanokporn Kosri, Ashour A. Ahmed, Hesham Mena, Riya Sehrawat, Sebastian Wohlrab, Thanapa Numpilai, Pongtanawat Khemthong, Thongthai Witoon, Kajornsak Faungnawakij, Bunyarat Rungtaweevoranit, Ali Abdel‐Mageed   +11 more
wiley   +1 more source

Titanium Additive Manufacturing with Powder Bed Fusion: A Bibliometric Perspective

Applied Sciences
Titanium additive manufacturing using powder bed fusion technologies has seen notable growth since 2015, particularly in high-performance sectors such as aerospace, biomedical, and automotive industries.
Antonio del Bosque, Pablo Fernández-Arias, Diego Vergara   +2 more
doaj   +1 more source

Influence of Heat Treatment and Scan Rotation on the Microstructure of Hot Work Tool Steel Manufactured using Laser Powder Bed Fusion

steel research international, EarlyView.
The study investigates the influence of heat treatment and scan rotation on the microstructure of a modified H13 tool steel manufactured using laser powder bed fusion. Key findings include the refinement of prior austenite grains (PAGs) due to recrystallization and carbide pinning, and the significant impact of scan rotation on the size distribution of
Negar Panahi, Fengxiang Lin, Christos Oikonomou, Mikael Grehk   +3 more
wiley   +1 more source

Additive Manufacturing of Hot‐Work Tool Steel by In Situ Alloying Using Laser Powder Bed Fusion and Directed Energy Deposition—Strategies to Improve Chemical Homogeneity

steel research international, EarlyView.
To support future alloy development a powder mixture is processed by laser additive manufacturing. The powder mixture containing Mo‐ and W‐rich tracers is processed by powder bed fusion using single and double laser exposure and by directed energy deposition which provides drastically enlarged melt pools.
Felix Großwendt, Sebastian Weber, Jonathan Lentz   +2 more
wiley   +1 more source