The FLEXTURBINE consortium is built around an industrially initiated nucleus: Core representatives of the European turbine industry have joined forces and involved leading European universities and research institutes to address the identified research and technology questions. They will cooperate to achieve the project objectives, sharing experience and know-how and developing results with complementary skills. The following figure outlines the contributions of each partner to the FLEXTURBINE topics and the impact on the future market drivers for flexible energy generation.
The consortium setup comprises all steps of the value chain and thus ensures that the technology is applied as soon as possible. The industrial design capabilities are complemented by selected high profile university departments, which are also involved in modelling activities as well as in preforming rig and component tests.

Fig. 1 - Partners Contribution and Impact

 

Consortium Map & Partner Details

Technical University of Darmstadt

The Chair and Institute for materials technology is part of the Technical University of Darmstadt 

stated as Technische Universität Darmstadt. The Institute is a technological and scientific center of competence for research and development, testing, teaching and consulting concerning a wide range of materials isssues in the field of mechanical engineering and construction, energy, automotive and medical technology. The department High Temperature Materials is concentrating on research and development issues in the field of creep, creep fatigue interaction, crack growth, complex loading like thermo-mechanical fatigue and multiaxial loading conditions, lifetime assessment and lifing model development. Furthermore one main objective is the development of complex material models to describe the deformation and damage behaviour. In this regard numerical simulations are performed to evaluate the deformation and crack growth behaviour under stationary and transient loading conditions. These subjects concern a wide range of high temperature materials such as heat-resistant steels, nickel-base superalloys, titanium and aluminium alloys as well as intermetallic compounds. Of interest is further the investigation of thermal protective coatings in terms of fracture mechanic and microstructural properties and lifetime.

Role in the project

TUDA has experience for decades in the subject of creep fatigue testing, creep fatigue crack growth, lifing model development, creep fatigue lifetime simulation and microstructural characterisation. TUDA participated in numerous collaborative national, European and international research projects and round robin exercises in these subjects. Concerning creep fatigue 

crack growth behaviour TUDA provides high competence in the subject of high temperature fracture mechanics testing, evaluation and modelling. In this regard TUDA developed several analytical models to describe crack growth and to assess lifetime under complex loading conditions (creep, fatigue, oxidation, thermo- mechanical fatigue). TUDA is capable to perform Fatigue Crack Growth (FCG) tests and Creep Crack Growth (CCG) tests under isothermal and complex loading conditions.

TUDA will perform tests in the high mean stress regime with variable load amplitudes to assess the fatigue and crack growth behaviour under superimposed loading conditions and to assess the required data for modelling. Main goal is to provide a methodology to quantify the effect of high mean stress and superimposed loading. Thus the performance of existing models will be tested and if these models will prove to be inadequate, the models have to be adapted. The interpretation of the results is supported by microstructural investigations.

 

Personnel involved

PDr. Alfred Scholz

Dr.-Ing. in creep fatigue interaction, head of department high temperature materials, 

25 years expertise in creep, creep fatigue and creep fatigue crack growth behaviour of heat resistant steels, nickel-base superalloys, lifing method and complex loading. Coordinator of numerous research projects, e.g. in COST538 action coordinator of nickel base alloys modelling, coordinator of an international round robin exercise, participant in several EU funded projects, coordinator of standardization activities (high temperature standards) for the German DIN.

scholz@mpa-ifw.tu-darmstadt.de 

Dr. Falk Müller

Dr.-Ing. in high temperature fracture mechanics, head of group crack growth behaviour 

at high tempera-tures and complex loading conditions, several years of expertise in fracture mechanics and lifing methods. Participant in several national, European and international projects dealing with crack growth behaviour.

fmueller@mpa-ifw.tu-darmstadt.de

Martin Frommherz

frommherz@mpa-ifw.tu-darmstadt.de


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