Development of Single-Crystal Ni-Base Superalloys Based on Multi-criteria Numerical Optimization and Efficient Use of Refractory Elements
Autor: | Jan Frenzel, Ralf Rettig, Alfred Ludwig, Ingo Steinbach, Janine Pfetzing-Micklich, Matthias Markl, Alexander Müller, Carolin Körner, Aparna P. A. Subramanyam, Dennis Naujoks, H. Schaar, Hofmeister Matthias, Ralf Drautz, Katrin Abrahams, Thomas Hammerschmidt, Nils Ritter, Robert F. Singer |
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Rok vydání: | 2018 |
Předmět: |
010302 applied physics
Structural material Materials science business.industry Metallurgy Alloy Metals and Alloys Base (geometry) Refractory metals 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Superalloy Development (topology) Mechanics of Materials 0103 physical sciences engineering 0210 nano-technology Process engineering business Material properties CALPHAD |
Zdroj: | Metallurgical and Materials Transactions A. 49:4134-4145 |
ISSN: | 1543-1940 1073-5623 |
Popis: | The development of new Ni-base superalloys with a complex composition consisting of eight or more alloying elements is a challenging task. The experimental state-of-the-art development cycle is based on the adaption of already existing compositions. Although new alloy compositions with potentially improved material properties are expected to be similar to already known superalloys, this procedure impedes efficiently finding these compositions in the large multi-dimensional design-space of all alloying elements. Modern alloy development combines numerical optimization methods with experimental validation to guide the development towards promising compositions. In this work, an improved numerical multi-criteria optimization tool using CALPHAD calculations and semi-empirical models for alloy development is presented. The model improvements to its predecessor are described and the successful application for the development of rhenium-free single-crystal Ni-base superalloys ERBO/13 and ERBO/15 is revisited. The optimization tool is described and the designed alloys are discussed regarding phase stability. Finally, a possible phase stability model extending the optimization tool and improving the alloy composition predictions is presented. |
Databáze: | OpenAIRE |
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