Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Priddy, Matthew W.

Committee Member

Doude, Haley R.

Committee Member

Soto-Medina, Sujeily

Date of Degree

8-9-2022

Document Type

Graduate Thesis - Open Access

Major

Mechanical Engineering

Degree Name

Master of Science (M.S.)

College

James Worth Bagley College of Engineering

Department

Department of Mechanical Engineering

Abstract

Additive manufacturing (AM) is used to create geometries otherwise impossible to machine. Topology optimization, microstructural texture control, and the use of lattices could be created through AM to increase performance of systems. Currently research focuses on solution aging of printed 17-4 PH, while other heat treatments are not as heavily studied. This study identifies different heat treatments applied to additively manufactured 17-4 precipitation hardened (PH) and the effects on mechanical properties. This study used quasi-static tension, quasi-static compression, and Charpy V-notch testing to analyze the effects of heat treatment as well as the effectiveness of additive manufacturing compared to traditional machining for wrought materials. Data during testing was taken with digital image correlation to identify changes in local strain. The effectiveness of heat treatment was demonstrated in this study and can be used to estimate performance on additively produced 17-4 PH.

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