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Progress in Additive Manufacturing
Erschienen in: Progress in Additive Manufacturing 3/2020

10.04.2020 | Full Research Article

Simulation-assisted analysis of microstructural evolution of Ti–6Al–4V during laser powder bed fusion

verfasst von: Peter Holfelder, Armin Witte

Erschienen in: Progress in Additive Manufacturing | Ausgabe 3/2020

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Abstract

A combination of a Multi-Phase Field model and an Orientation Field is proposed to describe the microstructure evolution induced by laser–material interaction in Laser Powder Bed Fusion (LPBF). The relevant phase transformations are covered by nucleation and growth processes driven by free enthalpy. An empiric correction is applied to the phase-field approach to reduce the grid resolution required for the numerical simulation. This contribution focuses on the LPBF processing of the titanium alloy Ti–6Al–4V. Particularly, the transition between \(\upbeta\)-titanium and melt is emphasized. The results are discussed and compared to measurements. A numerical correction can be applied to the MPF model to avoid a mesh introduct anisotopy in the crystal growth. The simulation shows the \(\upbeta\)-phase crystal growth with the (1 0 0) direction into the melt. The model for the phase transformation from \(\upbeta\)-phase to \(\upalpha\)-phase agrees with the XRD measurements.
Vorheriger Artikel Editorial
Nächster Artikel Thermal expansion behavior of Al–xSi alloys fabricated using selective laser melting

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Metadaten
Titel
Simulation-assisted analysis of microstructural evolution of Ti–6Al–4V during laser powder bed fusion
verfasst von
Peter Holfelder
Armin Witte
Publikationsdatum
10.04.2020
Verlag
Springer International Publishing
Erschienen in
Progress in Additive Manufacturing / Ausgabe 3/2020
Print ISSN: 2363-9512
Elektronische ISSN: 2363-9520
DOI
https://doi.org/10.1007/s40964-020-00114-w

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