Functional properties and shape memory effect of Nitinol manufactured via electron beam powder bed fusion

Fink A, Fu Z, Körner C (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Materialia Elsevier

Book Volume: 30

Article Number: 101823

DOI: 10.1016/j.mtla.2023.101823

Abstract

Ti-rich Nitinol (NiTi) is characterized by its functional properties to restore its original shape after deformation due to a temperature-induced reversible martensitic phase transition. In this study, dense Ti-rich Nitinol free of cracks is successfully produced by means of Electron Beam Powder Bed Fusion (PBF-EB). The martensitic phase transition behavior of the as-built NiTi parts and powder is analyzed using Differential Scanning Calorimetry (DSC) analysis. To gain a deep understanding of the DSC results, segregation during solidification is thermodynamically studied (CALPHAD). The PBF-EB-fabricated NiTi shows a microstructure containing fine columnar grains and numerous precipitates, whose influence on the tensile properties at room temperature is discussed. Furthermore, the one-way and two-way shape memory effects of PBE-EB-produced NiTi are investigated using an innovative experimental setup based on thermomechanical training.

Authors with CRIS profile

Alexander Fink Advanced Materials and Processes (ZMP) Zongwen Fu Advanced Materials and Processes (ZMP) Carolin Körner Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

How to cite

APA:

Fink, A., Fu, Z., & Körner, C. (2023). Functional properties and shape memory effect of Nitinol manufactured via electron beam powder bed fusion. Materialia, 30. https://dx.doi.org/10.1016/j.mtla.2023.101823

MLA:

Fink, Alexander, Zongwen Fu, and Carolin Körner. "Functional properties and shape memory effect of Nitinol manufactured via electron beam powder bed fusion." Materialia 30 (2023).

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