April 23-26, 2018 | Fort Worth Convention Center | Fort Worth, TX | Exhibits April 24-26

Melt Pool Geometry and Thermal Emission Monitoring in Laser Powder Bed Fusion

Academic Research I, II, III

Expert May 10, 2017 11:45 am - 12:10 pm

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Brian A. Fisher, PhD Candidate, Carnegie Mellon University
Jack Beuth PhD, Professor, Mechanical Engineering and Director, NextManufacturing Center, Carnegie Mellon University

Powder Bed Laser Melting of Ti-6Al-4V is an important process for use in the aerospace and medical device industries. In order to ensure widespread adoption of this technology, the ability to optimize process parameters through the use of non-standard parameter sets and the ability to ensure part quality are critical. This presentation investigates the link between three process inputs: beam power, beam travel velocity, and surface temperature of the part in order to find optimal areas of processing space by mapping process inputs to process outputs of interest. Experiments were conducted at Carnegie Mellon University using an EOS M290 DMLS machine and at NIST using an internally developed laser melting test bed. Additionally, high speed imaging is used to correlate process parameters to melt pool thermal emission in order to understand how melt pools change in-situ due to parameter modifications. This understanding can guide part quality monitoring software that is based on data from more simple sensors. A resulting relationship between melt pool area, processing conditions, and melt pool thermal emission will be presented.

Brian A. Fisher

PhD Candidate
Carnegie Mellon University

Brian Fisher is a PhD candidate under Professor Jack Beuth at Carnegie Mellon Un

Jack Beuth PhD

Professor, Mechanical Engineering and Director, NextManufacturing Center
Carnegie Mellon University

Dr. Beuth's research