Aerospace & Defense Technology - December 2024 - 29

Tech Briefs
APL researchers developed a precise modeling approach to simulate critical thermal dynamics. The melt pool microstructure of a precipitation-strengthened
nickel-base superalloy, shown here, was used to validate APL's model and cooling rate prediction. (Image: ASM International, 2024.)
printing it, which in turn can be used to
predict the mechanical properties of the
material and the performance of the fabricated
component.
Led by Li Ma, an APL Senior Staff Engineer
whose specialties include integrated
computational materials modeling
for additive manufacturing, researchers
developed a technique to predict the
microstructure formed during a single
laser pass over a certain volume of powder
via physics-based computational
modeling and simulation.
Specifically, the team used a computational
fluid dynamics (CFD) model to
quantify changes in temperature and
cooling rates during the printing process.
Thermal gradient and cooling rate
from CFD were used as input into another
model that predicts microstructural
formation, including grain structure and
phase formation. In the future, it will be
possible to use these simulations to predict
the microstructures of fully manufactured
components.
It was a monumental achievement -
but it didn't go quite far enough. Manufacturing
a single component entails
millions of laser passes. Simulating each
small region of that component's microstructure
would take hours of high-performance
computing time, severely
Aerospace & Defense Technology, December 2024
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29

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Aerospace & Defense Technology - December 2024

Table of Contents for the Digital Edition of Aerospace & Defense Technology - December 2024

Aerospace & Defense Technology - December 2024 - Intro
Aerospace & Defense Technology - December 2024 - Sponsor
Aerospace & Defense Technology - December 2024 - Cov1
Aerospace & Defense Technology - December 2024 - Cov2
Aerospace & Defense Technology - December 2024 - 1
Aerospace & Defense Technology - December 2024 - 2
Aerospace & Defense Technology - December 2024 - 3
Aerospace & Defense Technology - December 2024 - 4
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Aerospace & Defense Technology - December 2024 - 7
Aerospace & Defense Technology - December 2024 - 8
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Aerospace & Defense Technology - December 2024 - 11
Aerospace & Defense Technology - December 2024 - 12
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Aerospace & Defense Technology - December 2024 - 40
Aerospace & Defense Technology - December 2024 - Cov3
Aerospace & Defense Technology - December 2024 - Cov4
https://www.nxtbook.com/smg/techbriefs/24ADT12
https://www.nxtbook.com/smg/techbriefs/24ADT10
https://www.nxtbook.com/smg/techbriefs/24ADT09
https://www.nxtbook.com/smg/techbriefs/24ADT08
https://www.nxtbook.com/smg/techbriefs/24ADT06
https://www.nxtbook.com/smg/techbriefs/24ADT05
https://www.nxtbook.com/smg/techbriefs/24ADT04
https://www.nxtbook.com/smg/techbriefs/24ADT02
https://www.nxtbook.com/smg/techbriefs/23ADT12
https://www.nxtbook.com/smg/techbriefs/23ADT10
https://www.nxtbook.com/smg/techbriefs/23ADT09
https://www.nxtbook.com/smg/techbriefs/23ADT08
https://www.nxtbook.com/smg/techbriefs/23ADT06
https://www.nxtbook.com/smg/techbriefs/23ADT05
https://www.nxtbook.com/smg/techbriefs/23ADT04
https://www.nxtbook.com/smg/techbriefs/23ADT02
https://www.nxtbook.com/smg/techbriefs/22ADT12
https://www.nxtbook.com/smg/techbriefs/22ADT10
https://www.nxtbook.com/smg/techbriefs/22ADT09
https://www.nxtbook.com/smg/techbriefs/22ADT08
https://www.nxtbook.com/smg/techbriefs/22ADT06
https://www.nxtbook.com/smg/techbriefs/22ADT05
https://www.nxtbook.com/smg/techbriefs/22ADT04
https://www.nxtbook.com/smg/techbriefs/22ADT02
https://www.nxtbook.com/smg/techbriefs/21ADT12
https://www.nxtbook.com/smg/techbriefs/21ADT10
https://www.nxtbook.com/smg/techbriefs/21ADT09
https://www.nxtbook.com/smg/techbriefs/21ADT08
https://www.nxtbook.com/smg/techbriefs/21ADT06
https://www.nxtbook.com/smg/techbriefs/21ADT05
https://www.nxtbook.com/smg/techbriefs/21ADT04
https://www.nxtbook.com/smg/techbriefs/21ADT02
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