Publications

Displaying 1 - 9 of 9

The trace of heat: on the predictive power of modeling transient diffusion

June 26, 2025

Author(s)

Vijaya Holla, Timothy Redford, Philipp Kopp, Stefan Kollmannsberger

The paper at hand evaluates the validity of the transient heat equation with phase change and temperature-dependent coefficients as a model to predict the evolution of melt pools for rapid turnaround scan strategies in a laser powder bed fusion (PBF-LB)

Instrumented micro/macroindentation of porosity defects in laser powder bed fusion 316L stainless steel

June 5, 2025

Author(s)

Jordan Weaver, Houshang Yin, Jesse Redford, Xiaoyuan Lou

Porosity defects and their effect on mechanical properties remain a concern in metals-based laser powder bed fusion, even for optimized process parameters. Instrumented micro/macroindentation with Berkovich and spherical tips to forces of 50 N and 150 N

Measurement of Recoating Plane Error in Laser Powder Bed Fusion Additive Manufacturing Machines with an Inertial Measurement Unit

November 5, 2024

Author(s)

Jesse Redford, Jordan Weaver, Gregory Vogl

A Collaborative Study on The Characterization of Additive Manufacturing Build Surfaces and Solidified Melt Pool Topography

July 15, 2024

Author(s)

Jason Fox, Jesse Redford, Christopher Evans

A CRITICAL COOLING CONSTANT TO CLARIFY TRACK-TO-TRACK OVERHEATING IN LASER POWDER BED FUSION ADDITIVE MANUFACTURING OF IN625

July 15, 2024

Author(s)

Jesse Redford, Jason Fox, Christopher Evans

CHARACTERIZATION OF ANOMALOUS (ATYPICAL) SOLIDIFIED MELT POOLS IN NICKEL SUPERALLOY 625 LASER POWDER BED FUSION

July 15, 2024

Author(s)

Christopher Evans, Jesse Redford, Jason Fox, Jordan Weaver

In Laser Powder Bed Fusion (LBPF) for metal additive manufacturing, a combination of feedstock and processing parameters such as laser power and scan velocity, combined with part geometry can result in overheating and formation of localized anomalous melt

Scan Strategy Based Measurands For Characterization of Surface Topography in Laser Powder Bed Fusion

July 15, 2024

Author(s)

Jason Fox, Jesse Redford, Christopher Evans

Center-line-time functions and critical constants for predicting laser powder bed fusion melt pool distortion using one surface topography measurement

September 21, 2023

Author(s)

Jesse Redford, Jason Fox, Christopher Evans, brigid mullany

This work introduces a center-line-time function (CLTF) to characterize common scan strategies used in laser powder bed fusion (LPBF) that result in melt pool distortion. Eight rapid turnaround (RTR) samples, manufactured from nickel super alloy 625 using

Surface Topography and Melt Pool Behavior in Rapid Turnaround Regions of Laser Powder Bed Fusion Additive Manufacturing of Nickel Superalloy 625

July 13, 2023

Author(s)

Jason Fox, Christopher Evans, Jordan Weaver, Jesse Redford

The complexity and vast number of influencing variables in laser powder bed fusion (LPBF) have hindered the development of correlations between surface topography and part performance or process variables. To address this, the melt pool behavior in regions

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