[HTML][HTML] Controlling grain nucleation and morphology by laser beam shaping in metal additive manufacturing

TT Roehling, R Shi, SA Khairallah, JD Roehling… - Materials & Design, 2020 - Elsevier
Gaussian laser intensity profiles are standard in laser-based metal additive manufacturing,
although recent work in single-layer melt tracks showed that beam shaping could offer a …

[HTML][HTML] Microstructural control in metal laser powder bed fusion additive manufacturing using laser beam shaping strategy

R Shi, SA Khairallah, TT Roehling, TW Heo… - Acta Materialia, 2020 - Elsevier
Additive manufacturing (AM) promises to revolutionize manufacturing by producing complex
parts with tailored mechanical properties through local microstructure control. The main …

[HTML][HTML] Modulating laser intensity profile ellipticity for microstructural control during metal additive manufacturing

TT Roehling, SSQ Wu, SA Khairallah, JD Roehling… - Acta Materialia, 2017 - Elsevier
Additively manufactured (AM) metals are often highly textured, containing large columnar
grains that initiate epitaxially under steep temperature gradients and rapid solidification …

[HTML][HTML] Layer-wise engineering of grain orientation (LEGO) in laser powder bed fusion of stainless steel 316L

KA Sofinowski, S Raman, X Wang, B Gaskey… - Additive …, 2021 - Elsevier
Additive manufacturing (AM) has opened new possibilities for site-specific microstructure
control of metal alloys. In laser powder bed fusion (LPBF) AM, the microstructure can be …

Three-dimensional modeling of the microstructure evolution during metal additive manufacturing

O Zinovieva, A Zinoviev, V Ploshikhin - Computational Materials Science, 2018 - Elsevier
Prediction of microstructures of additive manufactured materials is a significant research
focus to face the challenge of producing tailored components. In this work, a three …

[HTML][HTML] Evolution of solidification texture during additive manufacturing

HL Wei, J Mazumder, T DebRoy - Scientific reports, 2015 - nature.com
Striking differences in the solidification textures of a nickel based alloy owing to changes in
laser scanning pattern during additive manufacturing are examined based on theory and …

The development of grain structure during additive manufacturing

AF Chadwick, PW Voorhees - Acta Materialia, 2021 - Elsevier
Additive manufacturing of structural alloys results in the formation of complex
microstructures, often with long, columnar grains that grow epitaxially from existing grains. A …

Numerical investigation of effects of nucleation mechanisms on grain structure in metal additive manufacturing

X Li, W Tan - Computational Materials Science, 2018 - Elsevier
Understanding the grain structure in metal additive manufacturing (MAM) builds is important
to improve the properties of MAM builds and the controllability of MAM processes. The …

Understanding grain evolution in additive manufacturing through modeling

J Akram, P Chalavadi, D Pal, B Stucker - Additive Manufacturing, 2018 - Elsevier
Variability in the mechanical properties of additively manufactured metal parts is a key
concern for their application in service. One of the parameters affecting the above …

[HTML][HTML] Beam shaping technology and its application in metal laser additive manufacturing: a review

J Bi, L Wu, S Li, Z Yang, X Jia, MD Starostenkov… - Journal of Materials …, 2023 - Elsevier
Laser additive manufacturing (AM) technology is widely applied in manufacturing critical
components (eg, rocket fuel nozzles, satellite antenna mounts and human implants, etc.) in …