Changes of phase composition of maraging steel 1.2709 during selective laser melting

Selective laser melting (SLM) as an additive manufacturing technology enables the quick production of complex shaped three-dimensional (3D) specimens directly from a metal powder. Various metal powders, including different steels, are used in this technology. The influence of the SLM process on the...

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Bibliographic Details
Published in:Hyperfine interactions 2020, Vol.241 (1), p.1-8, Article 2
Main Authors: Mashlan, Miroslav, Linderhof, Fredericus, Davidova, Magdalena, Kubickova, Hana, Zemtsova, Elena
Format: Article
Language:English
Subjects:
1-6 September 2019
Atomic
China
Condensed Matter Physics
Dalian
Fracture toughness
Hadrons
Heavy Ions
Inhomogeneity
Laser beam melting
Maraging steels
Metal powders
Molecular
Mossbauer spectroscopy
Nickel steels
Nuclear Physics
Optical and Plasma Physics
Phase composition
Physics
Physics and Astronomy
Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME2019)
Rapid prototyping
Scanning electron microscopy
Spectrum analysis
Steel alloys
Surface properties
Surfaces and Interfaces
Thin Films
Transformations
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Summary:Selective laser melting (SLM) as an additive manufacturing technology enables the quick production of complex shaped three-dimensional (3D) specimens directly from a metal powder. Various metal powders, including different steels, are used in this technology. The influence of the SLM process on the phase composition of the final 3D specimen has been examined by Mössbauer spectroscopy (MS) The surface quality has been examined by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The maraging steel 1.2709 (CL50WS), an iron-nickel steel alloy, which is often used in applications where high fracture toughness and strength are required has been investigated. The difference between the phase composition of the initial CL50WS powder and the final specimen identified via MS demonstrated transformation of a martensitic phase into an austenitic one. This transformation proceeds during the whole SLM process. SEM presented imperfections of the surface of the final specimen. The spherical and irregular pores were observed as well as the particles of initial powder bonded to face. Inhomogeneity of elements on the face has been observed by EDS.
ISSN:0304-3843
1572-9540
DOI:10.1007/s10751-019-1665-9