Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Uncertainties Induced by Processing Parameter Variation in Selective Laser Melting of Ti6Al4V Revealed by In-Situ X-ray Imaging

Journal Article · · Materials
DOI:https://doi.org/10.3390/ma15020530· OSTI ID:1894937

Selective laser melting (SLM) additive manufacturing (AM) exhibits uncertainties, where variations in build quality are present despite utilizing the same optimized processing parameters. In this work, we identify the sources of uncertainty in SLM process by in-situ characterization of SLM dynamics induced by small variations in processing parameters. We show that variations in the laser beam size, laser power, laser scan speed, and powder layer thickness result in significant variations in the depression zone, melt pool, and spatter behavior. On average, a small deviation of only ~5% from the optimized/reference laser processing parameter resulted in a ~10% or greater change in the depression zone and melt pool geometries. For spatter dynamics, small variation (10 μm, 11%) of the laser beam size could lead to over 40% change in the overall volume of the spatter generated. The responses of the SLM dynamics to small variations of processing parameters revealed in this work are useful for understanding the process uncertainties in the SLM process.

Research Organization:
Argonne National Laboratory (ANL)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1894937
Journal Information:
Materials, Journal Name: Materials Journal Issue: 2 Vol. 15; ISSN 1996-1944
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

References (42)

Energy density analysis on single tracks formed by selective laser melting with CoCrMo powder material journal March 2013
Sensitivity analysis of material and process parameters in finite element modeling of selective laser melting of Inconel 625 journal January 2016
Scanning strategy in selective laser melting (SLM): a review journal February 2021
Powder Bed Layer Characteristics: The Overseen First-Order Process Input journal April 2016
Tensile Properties and Microstructures of Laser-Formed Ti-6Al-4V journal May 2010
Effect of Laser Power and Scan Speed on Melt Pool Characteristics of Commercially Pure Titanium (CP-Ti) journal June 2017
Influence of energy density on energy demand and porosity of 316L stainless steel fabricated by selective laser melting journal January 2018
Powder flowability characterisation methodology for powder-bed-based metal additive manufacturing journal July 2015
Influence of processing parameters on the evolution of melt pool, porosity, and microstructures in Ti-6Al-4V alloy parts fabricated by selective laser melting journal August 2017
The role of powder layer thickness on the quality of SLM printed parts journal July 2018
A study of the microstructural evolution during selective laser melting of Ti–6Al–4V journal May 2010
Modulating laser intensity profile ellipticity for microstructural control during metal additive manufacturing journal April 2017
Transient dynamics of powder spattering in laser powder bed fusion additive manufacturing process revealed by in-situ high-speed high-energy x-ray imaging journal June 2018
Influence of layer thickness and post-process treatments on the fatigue properties of CoCr scaffolds produced by laser powder bed fusion journal October 2018
Design of laser parameters for selectively laser melted maraging steel based on deposited energy density journal August 2019
In-situ characterization and quantification of melt pool variation under constant input energy density in laser powder bed fusion additive manufacturing process journal August 2019
Correlation between forming quality and spatter dynamics in laser powder bed fusion journal January 2020
Influence of Particle Size on Laser Absorption and Scanning Track Formation Mechanisms of Pure Tungsten Powder During Selective Laser Melting journal August 2019
Optimisation of process parameters to address fundamental challenges during selective laser melting of Ti-6Al-4V: A review journal May 2018
Additive manufacturing of Ti–6Al–4V parts through laser metal deposition (LMD): Process, microstructure, and mechanical properties journal October 2019
Additive manufacturing of Ti6Al4V alloy: A review journal February 2019
A review of critical repeatability and reproducibility issues in powder bed fusion journal January 2020
The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282 journal July 2021
Identification and characterization of spatter particles and their effect on surface roughness, density and mechanical response of 17-4 PH stainless steel laser powder-bed fusion parts journal May 2019
Effect of beam shape and spatial energy distribution on weld bead geometry in conduction welding journal September 2019
Additive manufacturing of metallic components – Process, structure and properties journal March 2018
Discrete element simulation of powder layer thickness in laser additive manufacturing journal June 2019
The Influence of Processing Parameters on the Mechanical Properties of SLM Parts journal January 2015
Pore elimination mechanisms during 3D printing of metals journal July 2019
Real-time monitoring of laser powder bed fusion process using high-speed X-ray imaging and diffraction journal June 2017
Measurement of powder bed density in powder bed fusion additive manufacturing processes journal October 2016
Additive manufacturing of Ti-6Al-4V alloy components for spacecraft applications conference June 2013
Identifying Uncertainty in Laser Powder Bed Fusion Additive Manufacturing Models journal September 2016
On Characterizing Uncertainty Sources in Laser Powder Bed Fusion Additive Manufacturing Models conference November 2019
Keyhole threshold and morphology in laser melting revealed by ultrahigh-speed x-ray imaging journal February 2019
Effect of Layer Thickness in Selective Laser Melting on Microstructure of Al/5 wt.%Fe 2 O 3 Powder Consolidated Parts journal January 2014
Understanding the effects of PBF process parameter interplay on Ti-6Al-4V surface properties journal August 2019
An Overview of Additive Manufacturing of Titanium Components by Directed Energy Deposition: Microstructure and Mechanical Properties journal August 2017
In Situ Monitoring Systems of The SLM Process: On the Need to Develop Machine Learning Models for Data Processing journal June 2020
Process-Structure-Property Relationships of AISI H13 Tool Steel Processed with Selective Laser Melting journal July 2019
Laser Metal Deposition of Inconel 718 Alloy and As-built Mechanical Properties Compared to Casting journal January 2021
Research on Selective Laser Melting of Ti6Al4V: Surface Morphologies, Optimized Processing Zone, and Ductility Improvement Mechanism journal June 2018