A Numerical and Experimental Investigation of Steady-State and Transient Melt Pool Dimensions in Additive Manufacturing of Invar 36
Ha-Rok Bae (Committee Member), Joy Gockel (Advisor), Ahsan Mian (Committee Member)
Master of Science in Mechanical Engineering (MSME)
The use of additive manufacturing (AM) in tooling enables low production components to be fabricated with lower costs, reduced waste, increased design flexibility and reduced lead time. Invar 36 is a popular metal tooling material known for its low coefficient of thermal expansion. This work uses thermal finite element (FE) modeling as a tool to determine the feasibility of using Invar 36 in AM and to investigate the transient effect from common scanning strategies. Results show that the steady-state melt pool dimensions behave similar to traditional AM materials for varying process parameters. Transient results show that the melt pool response is dependent on processing parameters. Single and multiple pass experiments were performed to compare the modeling results and determine additional effects caused by repeated scans. Results show that Invar 36 is a suitable material for use in AM, which will enable rapid tooling for composite structures.
Department or Program
Department of Mechanical and Materials Engineering
Year Degree Awarded
Copyright 2017, all rights reserved. My ETD will be available under the "Fair Use" terms of copyright law.