Selective Laser Melting of TiNi Auxetic Structures

Moataz Attallah, Hany Hassanin, Khamis Essa, Sheng Li, Nicholas Adkins

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This talk details the pathway for the development of TiNi-based negative Poisson's ratio structure using selective laser melting (SLM). The SLM process-ability of Ti-rich TiNi was explored, revealing a high susceptibility to cracking and the formation of Ti2Ni intermetallics, as well as oxygen pick-up during the process. Process optimisation, by varying the process parameters, resulted in a significant reduction of cracking and porosity. Nonetheless, post-process heat treatments were essential to improve the microstructural homogeneity of the builds, and to reduce the Ti2Ni intermetallics to achieve the appropriate shape memory performance. Furthermore, optimisation of the auxetic structure via Finite Element Modelling (FEM) was used in order to design the target Poisson's ratio, with the SLM processed structure having a similar performance as predicted by FEM.
Original languageEnglish
Title of host publicationMS&T 2016
Subtitle of host publicationProceedings from the Materials Science and Technology 2016 Conference
PublisherMS&T Partner Societies
ISBN (Electronic)978-0873397643
Publication statusPublished - 23 Oct 2016
EventMS&T 2016: Materials Science and Technology 2016 Conference - Utah, Salt Lake City, United States
Duration: 23 Oct 201727 Oct 2017


ConferenceMS&T 2016
Country/TerritoryUnited States
CitySalt Lake City


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