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Title: Towards in process Materials Characterization in Laser-based Metal Additive Manufacturing.

Abstract

Abstract not provided.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1424852
Report Number(s):
SAND2017-2072C
651198
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the 2017 TMS held February 26 - March 3, 2017 in San Diego, CA.
Country of Publication:
United States
Language:
English

Citation Formats

Kustas, Andrew, Keicher, David M, Brumbach, Michael T., Nation, Brendan L, and Argibay, Nicolas. Towards in process Materials Characterization in Laser-based Metal Additive Manufacturing.. United States: N. p., 2017. Web.
Kustas, Andrew, Keicher, David M, Brumbach, Michael T., Nation, Brendan L, & Argibay, Nicolas. Towards in process Materials Characterization in Laser-based Metal Additive Manufacturing.. United States.
Kustas, Andrew, Keicher, David M, Brumbach, Michael T., Nation, Brendan L, and Argibay, Nicolas. Wed . "Towards in process Materials Characterization in Laser-based Metal Additive Manufacturing.". United States. doi:. https://www.osti.gov/servlets/purl/1424852.
@article{osti_1424852,
title = {Towards in process Materials Characterization in Laser-based Metal Additive Manufacturing.},
author = {Kustas, Andrew and Keicher, David M and Brumbach, Michael T. and Nation, Brendan L and Argibay, Nicolas},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}

Conference:
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  • Abstract not provided.
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  • Additive Manufacturing has garnered significant levels of interest in recent years as a primary manufacturing method. While the general technology has been around for over 20 years, with increased computing capacity, higher powered directed energy sources, e.g., lasers and electron beams, it is coming of age as a viable technique for high value added, low production quantity components. The Savannah River National Laboratory is interested in AM as a technique to build hydrogen isotope separation components called Thermal Cycling Absorption Process (TCAP) columns. The TCAP operates from cryogenic to moderate temperatures in a cyclic manner and is a pressure boundary.more » The current technique for fabricating TCAP columns is to form a flat coil of 0.375 to 0.5 inch diameter tube and braze two coils together. During the brazing operation, the two nested coils often move and this movement results in gaps between the coils. Since one coil contains the working fluid, i.e., liquid nitrogen, and the other the process fluid, hydrogen isotopes, these gaps result in poor heat transfer. Additive manufacturing is being explored as a replacement technology since the adjacent tubes can be fabricated simultaneously and in intimate contact and they can also share a common wall to improve heat transfer. AM allows designers to develop unique tube structures that overcome several of the shortcomings of the coil and braze technique, such as the braze gap in fabrication and slow cooling during operation. Simple test samples with various internal geometries were designed and built from Type 316L stainless steel using a laser powder bed process. Three test article geometries that were built include a simple tube, a pair of stacked tubes, and a tube partially surrounded by two kidney shaped tubes with cooling fins that would extend into the process fluid, these tube sections incorporated thermowells or heat trace channels, selectively. The test samples will be subjected to heat transfer testing and burst testing. The samples were inspected using X-ray, computed tomography, and metallography. The results of the testing conducted on these samples are described in this paper.« less
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