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High Performance Alloys

Research Field High Performance Alloys

The term High Performance Alloys encompasses a wide array of material systems. It usually denotes alloys that can withstand extreme environments, e.g. high temperatures or corrosive atmospheres, show an exceptional combination of strength and ductility or exhibit unique properties such as the shape-memory effect. The aim of the High Performance Alloys Group is to optimize existing materials and discover new alloys through systematic exploration of the relevant multi-dimensional alloying spaces.

Mitarbeiterfoto Christopher Zenk

Christopher Zenk, Dr.-Ing.

Mitarbeiterfoto Benjamin Wahlmann

Benjamin Wahlmann, M.Sc.

Mitarbeiterfoto Tobias Gaag

Tobias Gaag, M.Sc.

Mitarbeiterfoto Florian Galgon

Florian Galgon, M.Sc.

Mitarbeiterfoto Luis Morales

Luis Morales, M.Sc.

Mitarbeiterfoto Ning Luo

Ning Luo, M.Sc.

Mitarbeiterfoto Nick Semjatov

Nick Semjatov, M.Sc.

Journal Articles

Thesis

A new numerical tool will be explored that supports the experimental alloy developer in defining new compositions with potential for high strength. Starting with a composition space that is defined by the developer based on his metallurgical experience and his design goals, the numerical tool will propose the most promising compositions. The research program will on the one hand address open questions regarding the mathematical optimization in this application and on the other hand new models for predicting the relevant material properties.

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It is worked on novel hierarchical FeAl-based precipitate-strengthened alloys for high-temperature structural applications. Some of them show very unique hierarchical microstructure with L21 precipitates within B2 precipitates within a bcc matrix. This exciting group of materials resembles a promising low-cost alternative to Ni-superalloys and Ti-based alloys under specific conditions. A potential application for these alloys ultra-supercritical power plants with service temperatures…

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In this project two different but equally exciting material systems are being investigated:

Development of high temperature Cu-Al-Ni-X shape memory alloys (SMAs)

Compared to commercially available Ni-Ti SMAs, Cu-Al-Ni-X SMAs possess a slightly higher transformation temperature above 100 °C and exhibit a lower production cost. However, poor mechanical properties caused by their typically coarse grain size and anisotropy severely limit their worldwide application. Therefore, …

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