Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Robert A. Hafley"'
Autor:
Eric R. Burke, Robert A. Hafley, Joseph N. Zalameda, Karen M. Taminger, Brian L. Taminger, Christopher S. Domack
Publikováno v:
SPIE Proceedings.
Researchers at NASA Langley Research Center have been developing the Electron Beam Freeform Fabrication (EBF3) metal additive manufacturing process for the past 15 years. In this process, an electron beam is used as a heat source to create a small mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ce48ac63481c96400083bb0419d0584
https://doi.org/10.1117/12.2222439
https://doi.org/10.1117/12.2222439
Publikováno v:
TMS 2016 145th Annual Meeting & Exhibition ISBN: 9783319486246
TMS 2016: 145 Annual Meeting & Exhibition: Supplemental Proceedings
TMS 2016: 145 Annual Meeting & Exhibition: Supplemental Proceedings
Electron Beam Freeform Fabrication (EBF3) is an additive manufacturing technique, developed at NASA Langley Research Center, capable of fabricating large scale aerospace parts. Advantages of using EBF3 as opposed to conventional manufacturing methods
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5506517520940b61e4d98981f00526a
https://doi.org/10.1007/978-3-319-48254-5_23
https://doi.org/10.1007/978-3-319-48254-5_23
Publikováno v:
Materials Science Forum. :1297-1302
Electron beam freeform fabrication (EBF3) is a new layer-additive process that has been developed for near-net shape fabrication of complex structures. EBF3 uses an electron beam to create a molten pool on the surface of a substrate. Wire is fed into
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7efdb36aab0ab93b46c7cb7591f1812
https://doi.org/10.4028/www.scientific.net/msf.519-521.1297
https://doi.org/10.4028/www.scientific.net/msf.519-521.1297
Publikováno v:
Journal of Manufacturing Science and Engineering. 136
Electron beam freeform fabrication (EBF3), a metallic layer-additive manufacturing process, uses a high-power electron beam in conjunction with a metal feed wire to create a molten pool on a substrate, which on solidification produces a component of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf2db8a0909deff5c92981d92d4da50c
https://doi.org/10.1115/1.4028509
https://doi.org/10.1115/1.4028509
Autor:
Stephen J. Hales, Robert A. Hafley
Publikováno v:
Materials Science Forum. :1347-1352
The objective of this investigation was to correlate textural characteristics with yield strength anisotropy in identical T-stiffened extruded panels manufactured from the Al-Li alloys 2195, RX818 and 2096. Two regions within the panels were examined
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cc71f8baef73a52d7b019cca2cbeee9
https://doi.org/10.4028/www.scientific.net/msf.331-337.1347
https://doi.org/10.4028/www.scientific.net/msf.331-337.1347
Autor:
Robert A. Hafley, S.J. Hales
Publikováno v:
Materials Science and Engineering: A. 257:153-164
Low density aluminum-lithium (Al-Li) alloys, such as 2195, are candidate materials for reducing the structural weight of cryogenic tanks on launch vehicles. The objective of this investigation was to establish the relationship between mechanical anis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d858261450d46a7ec211508d78fa3d9a
https://doi.org/10.1016/s0921-5093(98)00834-x
https://doi.org/10.1016/s0921-5093(98)00834-x
Autor:
Amy R. Brewer, Joseph N. Zalameda, Christopher S. Domack, Eric R. Burke, Richard E. Martin, Karen M. Taminger, Robert A. Hafley
Publikováno v:
SPIE Proceedings.
Additive manufacturing is a rapidly growing field where 3-dimensional parts can be produced layer by layer. NASA s electron beam free-form fabrication (EBF(sup 3)) technology is being evaluated to manufacture metallic parts in a space environment. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d16dcd985b0c37a67588ba0cbe65ed1
https://doi.org/10.1117/12.2018233
https://doi.org/10.1117/12.2018233
Autor:
Robert A. Hafley, John T. Dorsey, Erik Komendera, Nikolaus Correll, William R. Doggett, Bruce D. King
Publikováno v:
AIAA SPACE 2012 Conference & Exposition.
Within NASA Space Science, Exploration and the Office of Chief Technologist, there are Grand Challenges and advanced future exploration, science and commercial mission applications that could benefit significantly from large-span and large-area struc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe25694ddae9c2ac4c9c9e82c14d5892
https://doi.org/10.2514/6.2012-5115
https://doi.org/10.2514/6.2012-5115
Publikováno v:
45th AIAA Aerospace Sciences Meeting and Exhibit.
The influence of reduced gravitational forces (in space and on the lunar or Martian surfaces) on manufacturing processes must be understood for effective fabrication and repair of structures and replacement parts during long duration space missions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58a522319a505903ef3e91d76925dce8
https://doi.org/10.2514/6.2007-1154
https://doi.org/10.2514/6.2007-1154