Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

In Situ Thermography During Laser Powder Bed Fusion of a Nickel Superalloy 625 Artifact with Various Overhangs and Supports

Published

Author(s)

Benjamin A. Molnar, Jarred C. Heigel, Eric P. Whitenton

Abstract

This document provides details on the experiment and associated measurement files available for download in the dataset "In Situ Thermography During Laser Powder Bed Fusion of a Nickel Superalloy 625 Artifact with Various Overhangs and Supports." The measurements were acquired during the fabrication of a small nickel superalloy 625 (IN625) artifact using a commercial laser powder bed fusion (LPBF) system. The artifact consists of two half-arch features with increasing degrees of overhangs, from 5 degrees to 85 degrees, in increments of 10 degrees. The artifact geometry and process are controlled to ensure consist processing along the overhang geometry, thus enabling the effect due to overhang geometry and support structures to be isolated from effects due to inter-layer scan-strategy variations that are typical in commercial LPBF processes. The measurements include high-speed thermography of each layer, from which radiant temperature, cooling rate, and melt pool length are calculated. The objective of this experiment and data dissemination is twofold. First, to provide data for the modeling community for model validation to ensure that their models are accurately accounting for the effect of overhang geometries and support structures in thermal models. The second objective is to provide fundamental insight into these effects for researchers and process designers.
Citation
Journal of Research (NIST JRES) -
Volume
126

Keywords

3D build, Additive manufacturing, IN625, nickel super alloy 625, powder bed fusion, temperature measurement, thermography, overhangs, reference artifact, model validation

Citation

Molnar, B. , Heigel, J. and Whitenton, E. (2021), In Situ Thermography During Laser Powder Bed Fusion of a Nickel Superalloy 625 Artifact with Various Overhangs and Supports, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/jres.126.005, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=930524 (Accessed September 21, 2021)
Created March 12, 2021, Updated April 6, 2021