Title

Characteristics of laser-fabricated metal structures

Authors

Authors

S. Sankaranarayanan; W. Guo;A. Kar

Comments

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Abbreviated Journal Title

Mater. Manuf. Process.

Keywords

EXTENDED SOLID-SOLUTION; DIFFUSION-MODEL; Engineering, Manufacturing; Materials Science, Multidisciplinary

Abstract

Laser-aided direct fabrication technology is developed to produce three-dimensional metal alloy structures directly from the constituent elements. The shapes of the structures are designed using Computer Aided Design (CAD) tools and are fabricated as real parts by fusing powders with a laser beam. In this study, alloy structures of simple plate like geometry were produced by mixing stainless steel (SS 316) powder with either copper or aluminum powder. The thickness of the component is related to the process parameters through an energy balance equation, which is verified against experimental data. Material properties such as hardness, strength and conductivity are analyzed and optical micrographs are presented to exhibit the microstructure of the alloy. The results show improved hardness at certain locations in the alloy, higher thermal conductivity of stainless steel. However, the structures broke due to brittle failure under tensile loads.

Journal Title

Materials and Manufacturing Processes

Volume

13

Issue/Number

4

Publication Date

1-1-1998

Document Type

Article

Language

English

First Page

537

Last Page

554

WOS Identifier

WOS:000075247200004

ISSN

1042-6914

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