NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Thermal Imaging for Assessment of Electron-Beam Free Form Fabrication (EBF(sup 3)) Additive Manufacturing WeldsAdditive 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. The benefits of EBF(sup 3) technology are weight savings to support space missions, rapid prototyping in a zero gravity environment, and improved vehicle readiness. The EBF(sup 3) system is composed of 3 main components: electron beam gun, multi-axis position system, and metallic wire feeder. The electron beam is used to melt the wire and the multi-axis positioning system is used to build the part layer by layer. To insure a quality weld, a near infrared (NIR) camera is used to image the melt pool and solidification areas. This paper describes the calibration and application of a NIR camera for temperature measurement. In addition, image processing techniques are presented for weld assessment metrics.
Document ID
20130013389
Document Type
Conference Paper
Authors
Zalameda, Joseph N.
(NASA Langley Research Center Hampton, VA, United States)
Burke, Eric R.
(NASA Langley Research Center Hampton, VA, United States)
Hafley, Robert A.
(NASA Langley Research Center Hampton, VA, United States)
Taminger, Karen M.
(NASA Langley Research Center Hampton, VA, United States)
Domack, Christopher S.
(Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Brewer, Amy R.
(Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Martin, Richard E.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 27, 2013
Publication Date
April 29, 2013
Subject Category
Metals And Metallic Materials
Report/Patent Number
NF1676L-16457
Meeting Information
SPIE Defense, Security, and Sensing 2013(Bellingham, WA)
Funding Number(s)
WBS: WBS 432938.09.02.07.03.14
Distribution Limits
Public
Copyright
Public Use Permitted.

Available Downloads

NameType 20130013389.pdf STI
No Preview Available