Alloy Design for Additive Manufacturing of Shape Memory Alloys

Description & AMAZEMET association

This study highlights advancements in additive manufacturing (AM) of NiTi Shape Memory Alloys (SMAs), addressing challenges like phase stability and compositional heterogeneity through tailored powder production. Using customized rePowder ultrasonic atomizers by AMAZEMET, spherical powders with high sphericity and controlled particle size distributions were produced at 20 kHz and 40 kHz frequencies. Analytical techniques, including SEM, DSC, and PSD, revealed the relationship between atomization parameters and the thermal and morphological properties of NiTi powders, paving the way for AM-compatible alloys with enhanced microstructural and mechanical characteristics.

Authors

Mohammad Pourshams 1, Hediyeh Dabbaghi 1, Behrang Poorganji 1, Mohammad Elahinia 1

1 University of Toledo, Toledo, Ohio, USA

Abstract

There is a growing need to design tailored alloys for Additive Manufacturing (AM) in order to achieve the desired properties and quality in the resulting parts. The need is even stronger for functional materials such as Nickel- Titanium (NiTi) shape memory alloys (SMAs) with microstructure-driven properties such as superelasticity and the shape memory effect. These alloys have been used in innovative applications in aerospace, biomedical, and robotics. Despite their potential, the realization of NiTi SMAs through AM faces significant challenges, including phase stability, compositional heterogeneity, and solidification defects, which impede the achievement of desired microstructural and mechanical characteristics.
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About the Author: Jakub Tomaszewski

Change agent and problem solver in the field of marketing, working with mission-driven businesses. Helping AMAZAMET Team to deliver the right message to the right person, at just the right time. Constantly working to build a better tomorrow through marketing. Passionate photographer and videographer. Privately loving husband and father.

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