Binary nickel-titanium shape memory alloys (SMAs) developed for wrought manufacturing processes require extensive amounts of cold work to achieve good mechanical performances. Cold working is undesirable in additive manufacturing. To meet this gap, a suite of precipitation hardenable NiTiHf SMAs have been developed for additive manufacturing to span superelastic, actuation, and structural/tribology performances. Additionally, the ability to control additively manufactured dislocation structures in the printing of binary NiTi alloys is also being examined. The metallurgy, thermomechanical properties, applications, and the first laser powder bed fusion process-structure-property relationships of both NiTi and NiTiHf alloys will be presented. Furthermore, these alloys promise a means for printing multi-functional structures from a single material ‚Äì the path forward to such technologies will be discussed.

The Next Generation of NiTi-based Shape Memory Alloys: Developed for Additive Manufacturing

The Virtual Technical Meeting of the Society of Engineering Science 2020 is the first fully virtual meeting of the SES community to envision and connect during the hiatus created by Covid-19, providing a platform for the exchange of ideas, and to showcase the latest research in the field of engineering science.

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