Title

Inconel 625 Additive Manufacturing Process Parameter Investigation on an EOS M290

Author

Johnson

Date of Award

8-2019

Degree Name

Master of Science

Department

Mechanical and Aerospace Engineering

Department

Mechanical and Aeronautical Engineering

First Advisor

Dr. Daniel Kujawski

Second Advisor

Dr. Jinseok Kim

Third Advisor

Dr. Erik Pederson

Fourth Advisor

Dr. Ralph Worthington

Keywords

Inconel 625, additive manufacturing, laser powder bed fusion, mechanical properties, process parameter

Access Setting

Masters Thesis-Abstract Only

Restricted to Campus until

8-2029

Abstract

Additive Manufacturing (AM) has been used to manufacture fully dense metallic production hardware by using a layer-by-layer build approach. There are various methods of producing metal components from AM, such as laser beam melting, electron beam melting, or metal deposition. Laser powder bed fusion (L-PBF) [1], a type of laser beam melting has grown in popularity for use in production settings due to its ability to produce consistently produce production hardware with material and mechanical properties similar to conventionally produced parts. However, a complete understanding of the material and mechanical properties and how AM processes parameters effect the properties of the resulting material is not fully understood. This research paper reviews a comprehensive study that investigates the material and mechanical properties of Inconel 625 produced with L-PBF in the as built and post high isostatic press (HIP) processing. Process parameters including laser power and laser speed have been studied. The material and mechanical properties of interest in this study include bulk material density, porosity, micro structure evaluation, material hardness, and tensile test properties. It is expected that from this report an acceptable range of process parameters can be identified to ensure parts meet all material and mechanical properties.

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