Work

Laser Beam Powder Bed Fusion of Co–Ni–Ga Shape Memory Alloy Using Single-Crystalline Substrate Material

Year: 2025

Type: article

Abstract: In the present study, a Heusler-type Co–Ni–Ga shape memory alloy (SMA) was additively manufactured using laser beam powder bed fusion (PBF-LB/M). This alloy system is known for its promising superelastic properties in single-crystalline state. Polycrystals, however, suffer from premature failure due to intergranular cracking under thermo-mechanical loading and/or processing. In order to overcome this issue, an appropriate microstructure design is of utmost importance for envisaged applications. The present study reports on the use of single-crystalline substrate plates as seed crystals during PBF-LB/M processing. Detailed microstructure analysis reveals the influence of processing parameters and scanning strategies on the solidification behavior and microstructure evolution with increasing built height. Eventually, a promising PBF-LB/M processing routine for obtaining additively manufactured Co–Ni–Ga structures with good shape memory effect is established.

Source: Shape Memory and Superelasticity

DOI: 10.1007/s40830-025-00555-8

Authors: Marius Horn, Christian Lauhoff, Moritz Kahlert, Adrian Guder, Philipp Krooß, Thomas Niendorf

Institution: University of Kassel

Language: English

Topic: Additive Manufacturing Materials and Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,390

Funders: Deutsche Forschungsgemeinschaft, Universität Kassel