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Directed Light Fabrication of Iron-Based Materials

Published online by Cambridge University Press:  15 February 2011

D.J. Thoma ,
C. Charbon ,
G.K. Lewis  and
R.B. Nemec
D.J. Thoma
Affiliation:
Los Alamos National Laboratory, Mail Stop G770, Los Alamos, NM 87545
C. Charbon
Affiliation:
Los Alamos National Laboratory, Mail Stop G770, Los Alamos, NM 87545
G.K. Lewis
Affiliation:
Los Alamos National Laboratory, Mail Stop G770, Los Alamos, NM 87545
R.B. Nemec
Affiliation:
Los Alamos National Laboratory, Mail Stop G770, Los Alamos, NM 87545
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Abstract

Directed light fabrication (DLP) is a rapid fabrication process that fuses gas delivered metal powders within a focal zone of a laser beam to produce fully dense, near-net shape, 3-dimensional metal components from a computer generated solid model. This study used iron-based alloys to evaluate the microstructural development in the DLF process. Continuous microstructural features are evident, implying a continuous liquid/solid interface during processing. In addition, solidification cooling rates have been determined based upon secondary dendrite arm spacings in Fe-25wt.%Ni and 316 stainless steel. Cooling rates vary from 101-105 K s-1, and the solidification behavior has been simulated using macroscopic heat transfer analyses.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 397: Symposium B – Advanced laser Processing of Materials-Fundamentals and Applications , 1995 , 341
Copyright
Copyright © Materials Research Society 1996

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References

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