Synopsis
Metals and alloys, being capable to withstand temperatures above 1200°C (2192°F) with stresses acting in the range of 100 MPa are of extremely high interest for several important applications. Additionally an oxidative aggressive environment is acting on the surface. Application examples are turbines used as jet engines or stationary gas turbines for electric power production. Also automotive engines are approaching these limits. These materials are therefore extremely attractive for industrial, environmental and socio-economical standpoints.

It is a major challenge to find and subsequently develop alloy systems which are capable of meeting these demands. State of the art materials used up to 1050°C are nickel-based superalloys and they will still be in service within the next 10 - 20 years. For highest demands they are used in single crystalline form in order to avoid grain boundary sliding. They approach up to 85% of their eutectic temperature in service. Further temperature improvements, needed to increase the efficiency, will be limited by these high homologous temperatures.

Potential new alloy systems are extensively studied by many research groups world-wide. The materials are tested and optimized with respect to the harsh loading conditions. The conference will be restricted to materials based on a metallic element and having metallic properties. A selected list of base elements ordered by decreasing melting point is: W, Re, Ta, Mo, Nb, Ir, Ru, Hf, Rh, V, Cr, Zr, Pt, Ti and Pd. A few of these systems are studied more intense than others (e.g. W, Mo, Nb, Pt, ... ). Intermetallic phases with high melting and/or disordering temperature are of interest as well. The conference will not cover ceramic materials as well as ceramic matrix composites.

Of special interest and experimentally demanding, since temperatures should exceed 1200°C, are the following characterization techniques:

• creep behavior
• oxidation resistance
• ductility from RT up to application temperature
• fatigue behavior
• resistance to crack propagation

Experimental approaches can be summarized by:

• alloy development
• mechanical testing
• microstructure observations (dislocation structures, phase changes) and correlation to mechanical behavior
• oxidation resistance and improvement of it
• "exotic" experimental setups (alloy development on a small scale, in-situ testing and characterization)

Simulation and modeling will cover:

• first principle calculations
• developing and testing of thermodynamic database for these materials

Simulation and modeling will cover:

• first principle calculations
• developing and testing of thermodynamic database for these materials

Outline
The conference will address the multi-disciplinary nature of high temperature alloys and will attempt to bring together those who have expertise in specific aspects of these alloys. Depending on the system, its manufacturing route and application, a variety of questions have to be answered through experimental investigations as well as by simulation and modeling. Presentation will cover:

• alloy development for creep behavior and oxidation resistance
• mechanical behavior including ductility from RT up to application temperature, fatigue behavior and resistance to crack propagation
• microstructure observations (dislocation structures, phase changes) and correlation to mechanical behavior
• experimental approaches including "exotic" experimental setups (alloy development on a small scale, in-situ testing and characterization)
• simulation and modeling
• applications

The program will consist of invited and solicited oral presentations and poster presentations. A Call for Abstracts will be issued shortly.

The conference chair is
Uwe Glatzel, University of Bayreuth, Germany
contact: uwe.glatzel@uni-bayreuth.de

The conference co-chairs are:
Bernard Bewlay, General Electric Global Research, USA
Lesley Cornish, University of Witwatersrand, South Africa
Martin Heilmaier, University of Darmstadt, Germany
Joachim Schneibel, (formerly) Oak Ridge National Laboratory, USA
David Shifler, Office of Naval Research, USA
Howard Stone, Rolls-Royce University Technology Centre, Cambridge, UK
Kyosuke Yoshimi, Tohoku University, Japan

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