Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Priddy, Matthew W.
Committee Member
Bian, Linkan
Committee Member
Doude, Haley R.
Date of Degree
8-9-2019
Original embargo terms
Worldwide
Document Type
Graduate Thesis - Open Access
Major
Mechanical Engineering
Degree Name
Master of Science
Degree Name
Doctor of Philosophy (Ph.D)
College
James Worth Bagley College of Engineering
College
James Worth Bagley College of Engineering
Department
Department of Mechanical Engineering
Department
Department of Mechanical Engineering
Abstract
This work seeks to characterize the impact of build interruptions to additively manufactured Al-Si-10-Mg produced by the powder bed fusion (PBF) process. Additive manufacturing represents a significant investment in overhead, machine, and material making an interruption to the process a potential waste of money and time. Interruptions in the form of power outages, lack of powdered feedstock, and/or shielding gas will cause the machine to operate in an unintended manner, potentially even stopping the build process. The process of manufacturing will influence the microstructure, which determine the material’s properties and performance. An interrupted PBF process could exhibit unique microstructural features and reduced mechanical properties that distinguish the resulting material from a continuous PBF process. Experiments were performed to simulate a production interruption with varying time periods of interruption and air exposure. The zone of interruption was characterized using optical micrographs, EDS, and hardness measurements to determine any effects of the interruption.
URI
https://hdl.handle.net/11668/14561
Sponsorship
United States Army Research Laboratory
Recommended Citation
Stokes, Ryan Mitchell, "Characterizing the effects of build interruptions on the microstructure and mechanical properties of powder bed fusion processed Al-Si-10Mg" (2019). Theses and Dissertations. 1046.
https://scholarsjunction.msstate.edu/td/1046