Understanding the hot isostatic pressing effectiveness of laser powder bed fusion Ti-6Al-4V by in-situ X-ray imaging and diffraction experiments

Tatiana Mishurova; Sergei Evsevleev; Pierre Piault; Andrew King; Laura Henry; Giovanni Bruno

doi:10.1038/s41598-023-45258-1

Understanding the hot isostatic pressing effectiveness of laser powder bed fusion Ti-6Al-4V by in-situ X-ray imaging and diffraction experiments

Sci Rep. 2023 Oct 27;13(1):18433. doi: 10.1038/s41598-023-45258-1.

Authors

Tatiana Mishurova¹, Sergei Evsevleev², Pierre Piault³, Andrew King³, Laura Henry³, Giovanni Bruno^{2

4}

Affiliations

¹ Bundesanstalt für Materialforschung und-prüfung (BAM; Federal Institute for Materials Research and Testing), Unter den Eichen 87, 12205, Berlin, Germany. tatiana.mishurova@bam.de.
² Bundesanstalt für Materialforschung und-prüfung (BAM; Federal Institute for Materials Research and Testing), Unter den Eichen 87, 12205, Berlin, Germany.
³ Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, 91192, Gif-sur-Yvette, France.
⁴ Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Straße 24/25, 14476, Potsdam, Germany.

Abstract

In the present study, in-situ observation of Hot Isostatic Pressure (HIP) procedure of laser powder bed fusion manufactured Ti-6Al-4V parts was performed to quantitatively estimate the densification rate of the material and the influence of the defect initial size and shape on such rate. The observations were performed in-situ using the Ultrafast Tomography Paris-Edinburgh Cell and the combination of fast phase-contrast synchrotron X-ray tomography and energy dispersive diffraction. With this strategy, we could quantify how the effectiveness of HIP depends on the characteristics of a defect. Smaller defects showed a higher densification rate, while the defect shape did not have significant effect on such rate.