Hydrogen trapping in 3D-printed (additive manufactured) Ti-6Al-4V

Journal Article · Mon Oct 15 04:00:00 UTC 2018 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2018.07.029· OSTI ID:22805800

Silverstein, Ravit; Eliezer, Dan ^[1]

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1. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva (Israel)

Highlights: • The AM process influence hydrogen trapping and desorption behavior. • Susceptibility to hydrogen embrittlement significantly depends on the printing direction. • Hydrogen desorption in SLM Ti-6Al-4V is designated to dislocations and Ti-hydride phase. - Abstract: Hydrogen trapping state and desorption behavior in 3D printed-Ti-6Al-4V, designed using additive manufacturing (AM), have been investigated. The AM process in this work is selective laser melting (SLM) by which components are built using melting powder's layers with a laser beam. During this process, hydrogen can meet with Ti, leading to a catastrophically failure known as hydrogen embrittlement. The effect of hydrogen on different textural anisotropy of AM-Ti-6Al-4V, and on metal's defect (created during the SLM process), have been studied in relation with hydrogen trapping state, and hydrogen embrittlement. The common effect of hydrogen on phase transformation in AM-Ti-6Al-4V has been shown. It is shown that the susceptibility to hydrogen embrittlement significantly depends on the printing direction. The impact of hydrogen desorption on AM-Ti-6Al-4V have been demonstrated with thermal desorption spectrometry (TDS), X-ray diffraction (XRD) and microstructural observations.

• OSTI ID: 22805800
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 144; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM COMPOUNDS
ANISOTROPY
DESORPTION
DISLOCATIONS
HYDROGEN EMBRITTLEMENT
LAYERS
MELTING
MICROSTRUCTURE
SPECTROSCOPY
TERNARY ALLOY SYSTEMS
TITANIUM COMPOUNDS
VANADIUM COMPOUNDS
X-RAY DIFFRACTION