Results 111 to 120 of about 13,736 (216)

Life Cycle Assessment of Metal Part Repair Using Directed Energy Deposition : A Comparison Between Arc- and Laser-Based Methods [PDF]

This bachelor’s thesis investigates the environmental performance of metal part repair using Directed Energy Deposition (DED), focusing on a comparison between arc-based (DED-Arc) and laser-based (DED-LB) methods. The analysis is based on a process-phase
Hörkkö, Jaakko
core  

Enhanced mechanical properties and deformation mechanisms in DED Inconel 625 via printing path switching

Materials Research Letters
In this work, the effects of printing path switching (0° and 90°) at high linear energy density on the grain structure transition and mechanical properties of directed energy deposition-arc (DED-Arc) Inconel 625 alloys were explored.
J.Y. Li, Jiajia Shen, S.Y. Yuan, W. Dong, Y. Cheng, Y.H. Zhao, J.P. Oliveira, Y. Zhang, K.H. Wang   +8 more
doaj   +1 more source

Dilution-induced compositional transformation and mechanical degradation in multi-material directed energy deposition

Materials Research Letters
Multi-material additive manufacturing enables the integration of dissimilar materials to create heterostructured materials with multifunctional properties.
Shubo Gao, Peng Chen, Jun Feng Low, Youxiang Chew   +3 more
doaj   +1 more source

Channel Wall Nozzle Manufacturing and Hot-Fire Testing Using a Laser Wire Direct Closeout Technique for Liquid Rocket Engines [PDF]

No abstract ...
Brandsmeier, Will, Gradl, Paul, Greene, Sandy E.   +2 more
core   +1 more source

Magnetism, FeS colloids, and Origins of Life

, 2010
A number of features of living systems: reversible interactions and weak bonds underlying motor-dynamics; gel-sol transitions; cellular connected fractal organization; asymmetry in interactions and organization; quantum coherent phenomena; to name some ...
A Ahniyaz, A Engel, A Etxeberria, A Nagya, A Preisinger, A Pross, A Yethiraj, AD Patel, AD Patel, AD Patel, AG Cairns-Smith, AJ Boyce, AJ Boyce, AL Buchachenko, AM Selvam, AM Tishin, AP Roberts, AS Keys, AY Zubarev, AY Zubarev, B-O Küppers, BA Grzybowski, C Bustamante, C Huber, C Jaryznski, C Tenailleau, C Viedma, CR Vestal, D Abel, D Abel, D Rickard, D Rickard, D Rickard, den Hollander WThF, DG Drubin, DI Khomskii, DJ Vaughan, DJ Vaughan, DL Stein, DS Kelley, E Schroedinger, EJ Milner-White, EJ Milner-White, ET Degens, EV Koonin, F Heylighen, FJ Dyson, FM Harold, G Mitra-Delmotte, G Nicolis, G Wächtershäuser, GL Früh-Green, GN Ling, GO Arrhenius, GS Engel, H Frohlich, H Frohlich, H Ohfuji, H Ohfuji, H Ohldag, HH Pattee, HH Pattee, HM Palmer, I Adler, I Kant, IK Kominis, J Al-Khalili, J Breivik, J Charnock, J Cheon, J Dyment, J Hemberger, J Higo, J Hoffmeyer, J Li, J McFadden, J Spitzer, J Torbet, JC Weaver, JD Bernal, JK Jain, JL Kirschvink, JL Kirschvink, JL Kirschvink, JM McBride, JP Ferris, JS Ban, JS Beard, JT Trevors, K Hatori, K Matsuno, K Righter, KA Michie, KM Doll, LE Orgel, LE Orgel, LE Orgel, LS Levitov, M Haw, M Jibu, M Mostovoy, M Polyani, M Winkelhofer, M Wolthers, M Wu, MF Chaplin, MF Chaplin, Mitra-Delmotte, MJ Russell, MJ Russell, MJ Russell, MJ Russell, MJ Russell, MJ Russell, MJ Russell, MJ Russell, MJ Russell, MJ Russell, MO Goerbig, MP Pileni, NE Mavromatos, NJ Cerf, P Baaske, P Bak, P Galland, P Wasilewski, PCW Davies, PCW Davies, PCW Davies, PW Anderson, R Hazen, R Kopelman, R Lifshitz, R Palm, R Pastor-Satorras, R Phillips, R Shapiro, R Skomski, RA Dunlap, RCL Larter, RD Astumian, RD Astumian, RE Rosensweig, RT Wilkin, RW Chantrell, S Hagan, S Itoh, S Kauffman, S Lloyd, S Odenbach, S Sun, S Taketomi, S Traverso, SA Newman, T Schroeder, V Fritsch, V Hoffmann, VK Mer La, VM Goldschmidt, VN Manoharan, VTh Marteinsson, VV Korolev, W Cruz da, W Martin, W Martin, WH Zurek, Y Kwon, Y Lalatonne, Y Min, Z Merali, Z Sawlowicz, Z Sawlowicz, Z Wang   +172 more
core   +1 more source

Bimetallic Channel Wall Nozzle Development and Hot-Fire Testing Using Additively Manufactured Laser Wire Direct Closeout Technology [PDF]

NASA has been developing and advancing regeneratively-cooled channel wall nozzle technology for liquid rocket engines to reduce cost and schedules associated with fabrication. One of the primary methods being advanced is Laser Wire Direct Closeout (LWDC).
Gradl, Paul, Greene, Sandy, Wammen, Tal
core   +1 more source

Microstructure and Mechanical Property of Thin-Walled Inconel 718 Parts Fabricated by Ultrasonic-Assisted Laser-Directed Energy Deposition

Crystals
Laser-directed energy deposition (DED) offers significant potential for the additive manufacturing of thin-walled Inconel 718 aerospace components. However, the structural defects readily formed during deposition, along with the extensive precipitation ...
Bo Peng, Xiaoqiang Zhang, Mengmeng Zhang, Ze Chai, Fahai Ba, Xiaoqi Chen   +5 more
doaj   +1 more source

Production of Sustainable Powders for Direct Energy Deposition (DED)

, 2022
openaire   +2 more sources

Additive Manufacturing of Liquid Rocket Engine Combustion Devices: A Summary of Process Developments and Hot-Fire Testing Results [PDF]

Additive Manufacturing (AM) of metals is a processing technology that has significantly matured over the last decade. For liquid propellant rocket engines, the advantages of AM for replacing conventional manufacturing of complicated and expensive ...
Bullard, Brad, Buzzell, James, Cooper, Kenneth, Garcia, Chance, Gradl, Paul, Greene, Sandy E., Hulka, James, Osborne, Robin, Protz, Christopher, Wood, Jessica   +9 more
core   +4 more sources

Mechanical testing and microstructural analysis of wire laser beam directed energy deposited steel plates

Materials & Design
Wire laser beam directed energy deposition, referred to herein as DED-LB, has emerged as a key technology in additive manufacturing, enabling the efficient and cost-effective production of large-scale components.
Wenxuan Hong, Pinelopi Kyvelou, Ruizhi Zhang, Leroy Gardner   +3 more
doaj   +1 more source