B0731 Life assessment of hot section gas turbine componets

These proceedings of a conference held at Heriot Watt University, Edinburgh, UK cover the important issues of both aero and industrial engines. The critical issues associated with design, creep and fatigue crack growth, coating technologies, new materials, repair and maintenance of hot section components were covered Contents 6 Introduction 8 Design Issues for Aeroengines 10 Lifing Strategies for High Temperature Fracture Critical Components 20 Life Management Issues for Operators 44 Microstructural Design of IN706-type Disc Materials for Improved Creep Crack Growth Resistance 58 Fatigue in Modern Nickel-Base Alloys for Gas Turbine Applications 70 Influence of Creep and Oxidation on the Elevated Temperature Crack Growth Behaviour of a Near-α Titanium Alloy 92 Effects of Grain and Precipitate Size Variation on Creep-Fatigue Behaviour of Udimet 720Li 106 Modelling of Creep Strain Behaviour of Udimet 720Li Wrought Superalloy 118 Characterisation of Damage Accumulation During the Creep Deformation of CMSX-4 at 1150 °C 128 Coating Life Assessment 144 Combined Effects of Temperature Gradient and Oxidation on Thermal Barrier Coating Failure 164 Investigation of Microstructural Development of PtAl Diffusion Coatings 182 Diffusion Barriers for Gas Turbine Superalloy Blades 194 Thermomechanical Fatigue of Coated Superalloys 202 High Temperature Deformation and Crack Growth in y-TiAl Base Intermetallic Materials 218 Application of Thermal Barrier Coatings on NiAl Intermetallic Material 238 Residual Life Assessment: Approaches, Techniques and Questions 246 Life Management System for Combustion Turbine Blades and Vanes 258 Predicting the Remnant Life of Corrosion Resistant Coatings 280 A Modelling Approach to Gas Turbine Blade Life Management 290 Stress Relaxation as a Basis for Blade Creep Life Assessment 302 Microstructural Evaluation of MCrAlY/Superalloy Interdiffusion Zones 320 The Development of a Process Model for the Weldability of Nickel-Base Superalloys for Gas Turbine Applications 336 Author Index 348 Subject Index 349 CreatedByIRIS_Readiris 'Proceedings of a Conference Held at Heriot Watt University, Edinburgh, 5-7 October 1999.Contents include: Design and Life Management; Cracks and Lifing; Continuum Damage; Coatings; Low Ductility Materials; Remaining Life Assessment; Repair Technology.'