In Situ Measurements of Melt-Pool Length and Cooling Rate During 3D Builds of the Metal AM-Bench Artifacts

Published

February 20, 2020

Author(s)

Jarred C. Heigel, Brandon M. Lane, Lyle E. Levine

Abstract

This work provides results and analysis of the in situ thermal measurement acquired during the 3D builds performed for the 2018 Additive Manufacturing Benchmark Tests. The objective is to provide context for post process characterization of distortion, residual strain, and microstructure, which are reported elsewhere in this journal issue, and to provide validation data for thermal models of the build process. Four bridge artifacts (75 mm long, 5 mm wide, 12.5 mm tall) are created in each of four builds using a commercial laser powder bed fusion (LPBF) system. One build is executed using 15-5 stainless steel, while the other three are performed using nickel super alloy 625 (IN625). High-speed infrared thermography performed during four of the builds is used to measure the melt pool length and cooling rate within a select region. The temperature of the substrate and build volume is measured during the fifth build to provide data to establish the boundary conditions for thermal models.

Citation

Integrating Materials and Manufacturing Innovation

Pub Type

Journals

Download Paper

https://doi.org/10.1007/s40192-020-00170-8

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Keywords

Additive manufacturing, Process measurement and control, Thermal properties, Metals, Modeling and simulation research, Thermometry metrology, Laser powder bed fusion, 3D build, Temperature, Cooling rate, Melt pool, Model validation

Citation

Heigel, J. , Lane, B. and Levine, L. (2020), In Situ Measurements of Melt-Pool Length and Cooling Rate During 3D Builds of the Metal AM-Bench Artifacts, Integrating Materials and Manufacturing Innovation, [online], https://doi.org/10.1007/s40192-020-00170-8 (Accessed October 25, 2025)