2024 Undergraduate Research Showcase

The Effect of Print Parameters on the Mechanical Behavior and Chemical Composition of Additively Manufactured Nickel Based Alloys

Document Type

Student Presentation

Presentation Date

4-19-2024

Faculty Sponsor

Dr. Brian Jaques

Abstract

Additive manufacturing (AM) has the potential to reinvent the manufacturing industry by reducing energy usage and waste production. Specifically, Laser powder bed fusion (L-PBF), is an AM process, has been shown to produce high resolution, fully dense parts with improved mechanical performance compared to traditionally manufactured parts. The purpose of this study is to investigate how the print parameters of the L-PBF process affect the final materials properties, microstructure, and composition of stainless steel-316L (SS-316L) components. After printing, monolith specimens were segmented using wire electrical discharge machining and labeled via laser engraving for sample tracking and spatial correlation relative to the original build orientations. Elemental analysis using LECO ON an CS was done on the samples to correlate composition to energy density of parts. Scanning electron microscopy (SEM) with elemental analysis was utilized to correlate chemical compositions to microhardness. Standard and high energy density shielded samples had higher concentrations of C, Si, O, Mo, and Mn compared to unshielded samples. The implications of this study will allow further understanding of the ways that flaws form in AM materials and allow for the development of mitigation strategies and improved build plans.

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