MIL OSI – Source: TU Berlin –
Headline: Programme: DFG – Priority Programme “Compositionally Complex Alloys – High Entropy Alloys (CCA-HEA)” (SPP 2006)
Montag, 24. Oktober 2016″Recently, a novel class of metallic alloys, referred to as “high entropy alloys” (HEA) or “compositionally complex alloys” (CCA), has been introduced. These alloys consist of near-equiatomic concentrations of multiple metallic elements. As such, they fundamentally differ from conventional alloys, which commonly consist of a primary element with additions of secondary (alloying) elements in order to achieve desired properties. This new concept of alloy design with no base element opens up a huge multi-component space with significant technological potential and poses challenging scientific questions.
The aim of this Priority Programme is to develop CCA and HEA with outstanding mechanical properties or displaying unusual phenomena, which cannot be obtained in conventional alloys, or be explained by current textbook-level theory. Within this programme, alloys with five or more elements are targeted, each having a concentration between 5 and 35 at. %. Lower-order subsets of these alloys, namely binaries, ternaries and quaternaries, may be investigated in supporting roles only, in order to gain basic understanding of CCA and HEA. In order to optimise targeted materials properties, small additions of minor alloying elements such as C, B, Hf, Zr, Si, etc., are permitted.
The Priority Programme will comprise two branches:High entropy alloys, HEA, which are defined within this Priority Programme as single solid solution phases, preferably with simple crystal structures.Compositionally complex alloys, CCA, consisting of multiphase microstructures with two or more phases, which may include a solid solution phase.[…]The proposals will be evaluated in the course of a colloquium in Bayreuth with short talks and poster presentations, scheduled for 4 April 2017.”…
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(Quelle: DFG Informationen für die Wissenschaft, Nr. 65, 14.10.2016)