Developing Post Processing Treatments to Improve the Performance of LPBF Parts
Metallic additively manufactured parts suffer from defects and high anisotropy, which can render them inferior to conventionally manufactured parts such as forged and cast parts.
This project aims at developing post processing heat treatments for additively manufactured Inconel 718 and 15-5PH.
The goal of the heat treatments is to homogenize the microstructure and reduce the anisotropy and the severity of the defects.
Tensile testing, SEM microscopy, fractography, X-ray diffraction, and Rietveld refinement characterization techniques were used to analyze the influence of the heat treatment.
Developed heat treatment succeeded in reducing the anisotropy and improved the reliability of the additively manufactured Inconel 718 and 15-5PH steel.
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Characterizing the Mechanical Behavior and Microstructure of As-Built LPBF parts
This project aimed at characterizing the microstructure and mechanical behavior of two of the most common additively manufactured alloys, Inconel 718 and 15-5PH, in their as-built condition at room temperature and elevated temperatures.
Specimens were fabricated in different orientations.
Tensile testing, SEM microscopy, and fractography characterization techniques were implemented.
Preliminary Bayesian inference model was implemented to predict the tensile strength for additively manufactured 15-5PH fabricated in different orientations and at different environmental temperatures.
