Introduction<br>Peculiarities of Metallic Surfaces<br>Experimental Techniques<br>The Electron Work Function of Strained Surfaces<br>Modeling of the Work Function<br>Contact Interaction of Metallic Surfaces<br>Fatigue Location Prediction<br>Computer Simulation of Parameter Evolution During Fatigue<br>Stressed Surfaces in Gas Turbine Engine Components<br>Strengthening and Nanostructuring of Metal Surfaces<br>The Physical Mechanism of Fatigue

PECULIARITIES OF THE METALLIC SURFACE<br>Surface Energy and Surface Stress<br>Crystal Structure of a Surface<br>Surface Defects<br>Distribution of Electrons Near the Surface<br>SOME EXPERIMENTAL TECHNIQUES<br>Diffraction Methods<br>Distribution of Residual Stresses in Depth<br>The Electronic Work Function<br>Indentation of Surface. Contact Electrical Resistance<br>Materials under Investigation<br>EXPERIMENTAL DATA ON THE WORK FUNCTION OF STRAINED SURFACES<br>Effect of Elastic Strain<br>Effect of Plastic Strain<br>Influence of Adsorption and Desorption<br>MODELING THE ELECTRONIC WORK FUNCTION<br>Model of the Elastic Strained Single Crystal<br>Taking into Account the Relaxation and Discontinuity of the Ionic Charge<br>Model for Neutral Orbital Electronegativity<br>CONTACT INTERACTION OF METALLIC SURFACES<br>Mechanical Indentation of the Surface Layers<br>Influence of Indenation and Surface Roughness on the Work Function<br>Effect of Friction and Wear on Energetic Relief<br>PREDICTION OF FATIGUE LOCATION<br>Forecast Possibilities of the Work Function. Experimental Results<br>Dislocation Density in Fatigue-Tested Metals<br>COMPUTER SIMULATION OF PARAMETER EVOLUTIONS DURING FATIGUE<br>Parameters of the Physical Model<br>Equations<br>System of Differential Equations<br>Results of the Simulation: Changes in the Parameters<br>STRESSED SURFACES IN THE GAS-TURBINE ENGINE COMPONENTS<br>Residual Stresses in the Surface of Blades and Disks and Fatigue Strength<br>Compressor Blades of Titanium-Based Alloys<br>NANOSTRUCTURING AND STRENGTHENING OF METALLIC SURFACES. FATIGUE BEHAVIOR<br>Surface Profile and Distribution of Residual Stresses with Depth<br>Fatigue Strength of the Strained Metallic Surface<br>Relaxation of the Residual Stresses under Cyclic Loading<br>Microstructure and Microstructural Stability<br>Empirical and Semi-Empirical Models of Fatigue Behavior<br>Prediction of Fatigue Strength<br>THE PHYSICAL MECHANISM OF FATIGUE<br>Crack Initiation<br>Periods of Fatigue-Crack Propagation<br>Crack Growth<br>Evolution of Fatigue Failure<br>S-N Curves<br>Influence of Gas Absorption<br>IMPROVEMENT IN FATIGUE PERFORMANCE<br>Restoring Intermediate Heat Treatment<br>Effect of the Current Pulse on Fatigue<br>The Combined Treatment of Blades<br>Structural Elements of Strengthening<br>SUPPLEMENT I<br>List of Symbols<br>SUPPLEMENT II<br>Growth of a Fatigue Crack. Description by a System of Differential Equations