The leading experts in the field convened to exchange their latest scientific findings, to discuss the next step in the development of high temperature shape memory alloys (HTSMAs) "From basics to applications", and to work out new ideas.
Over the past years, scientific as well as industrial interests in HTSMAs have increased significantly as these materials allow new industrial applications and are highly attractive for use in a wide range of applications such as mechanical engineering, aviation and automotive engineering. Thus, worldwide efforts are now made to develop and establish suitable material systems.
The conference provided an insight into the relationships between manufacturing, microstructure, properties, characterization, testing, modelling and of course application of HTSMAs.
The conference kicked off with the talk by Professor H. Karaca who presented the latest developments in Ni-Ti-Hf alloys. In his opening plenary, he focused on the material properties of conventionally produced HTMSAs compared with those obtained by additive manufacturing. Specifically, he could demonstrate that these materials have matured to a point, where their commercial use in very demanding applications is within reach.
The second plenary talk was given by Professor P. Sittner. He provided a profound insight into the phase transformation processes in shape memory alloys under thermo-mechanical loading. The use of advanced diffraction methods allowed his group to separate the contributions of the different microstructural processes to damage evolution.
The majority of the talks and poster presentations addressed Ni-Ti-X alloys as well as other promising systems such as Ti-Ta, Co-Ni or Fe-Mn based ones. In fact, the conference contributions covered the whole process chain from the alloy design stage to the manufacturing of first demonstrators. In particular, it could be shown how the systematic choice of alloy components, processing conditions and heat treatments can lead to HTSMAs that feature stable properties at elevated temperatures.
The three best posters were selected by the conference participants and honoured with poster awards during the conference dinner.
This year’s poster award winners are:
Lukas Kaderavek, L. Heller, L. Klimša, P. Šittner, The Czech Academy of Sciences (Czech Republic)
Temperature dependence of localized deformation of NiTi wires in tension characterized by 1D-DIC method
Malte Vollmer, P. Krooß, C. Lauhoff, T. Niendorf, University of Kassel (Germany)
On the suitability of Fe-Mn-Al-Ni for high temperature shape memory alloy applications
Thomas Waitz, M. Kerber, University of Vienna (Austria); M. Matsuda, Kumamoto University (Japan)
Ti-Pt high-temperature shape memory alloy subjected to severe plastic deformation
Given the positive response of the participants to the concept of the first HTSMAs, the schedule for the second conference again allowed for sufficient time for lively discussions. In addition to the highly interesting scientific programme, the HTSMAs 2018 offered other highlights as well, such as joint trips to Neuschwanstein Castle and the Katzbrui-Mühle followed by the conference dinner.
The feedback from this year’s participants also turned out very positive: Many of them emphasized that they were able not only to exchange their ideas with other experts and plan collaborations, but also to make new friends.
The conference was chaired by Prof. Hans Jürgen Maier from theInstitut für Werkstoffkunde (Materials Science) at Leibniz Universität Hannover (Germany).
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