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Microstructures of Laser Deposited 304L Austenitic Stainless Steel

Published online by Cambridge University Press:  10 February 2011

John A. Brooks ,
Thomas J. Headley  and
Charles V. Robino
John A. Brooks
Affiliation:
Sandia National Laboratories, Livermore, CA
Thomas J. Headley
Affiliation:
Sandia National Laboratories, Albuquerque, NM
Charles V. Robino
Affiliation:
Sandia National Laboratories, Albuquerque, NM
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Abstract

Laser deposits fabricated from two different compositions of 304L stainless steel powder were characterized to determine the nature of the solidification and solid state transformations. One of the goals of this work was to determine to what extent novel microstructures consisting of single-phase austenite could be achieved with the thermal conditions of the LENS process. Although ferrite-free deposits were not obtained, structures with very low ferrite content were achieved. It appeared that, with slight changes in alloy composition, this goal could be met via two different solidification and transformation mechanisms.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 625: Symposium Y – Solid Freeform & Additive Fabrication – 2000 , 2000 , 21
Copyright
Copyright © Materials Research Society 2000

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