Fatigue of Steels Modified by High-Intensity Electron Beams

Contents:

Introduction

Chapter 1: Methods for increasing the fatigue life of metals and alloys • Fatigue failure of metals and alloys • Periods and stages of fatigue for finite life • Role of contact effects in fatigue processes • Factors influencing the fatigue of metals and alloys • Influence of the initial structure and the state of the surface layer • Influence of temperature and test environment on fatigue • Impact of the scale factor and loading conditions on fatigue • Evolution of the structure, phase composition and dislocation substructures in fatigue properties of steels by external energy effect • Types of dislocation substructures arising from fatigue • Modification of the properties of steels by external energy effect • Surface hardening of metals with concentrated energy fluxes • Conclusion of Chapter 1

Chapter 2: Materials and methods • Experimental material • Electron-beam treatment of steels • Equipment for surface treatment of materials with high-intensity low-energy electron beams • Methods of fatigue testing • Methods for structural studies • Method of quantitative analysis of experimental results

Chapter 3: Structure of the surface layer of 08Cr18Ni10Ti steel treated with high-intensity electron beam in different modes • Structural-phase state of 08Cr18Ni10Ti steel before electron beam irradiation • Comparative analysis of structural and phase states of the surface layer of 08Cr18Ni10Ti steel treated with a high-intensity electron beam of submillisecond duration • Gradients of structural and phase states of 08Cr18Ni10Ti steel treated with high-intensity electron beam in the pre-melting mode • Gradients of structural and phase states of 08Cr18Ni10Ti steel treated with high-intensity electron beam in the melting mode of the surface layer • Conclusion of Chapter 3

Chapter 4: Structure formed in the zone of fatigue failure of 08Cr18Ni10Ti steel treated with high-intensity electron beam • Structural phase state, formed in 08Cr18Ni10Ti steel under high-cycle fatigue • Gradients of structural and phase states formed in 08Cr18Ni10Ti steel treated with high-intensity electron beam in the initial stage of melting, under high-cycle fatigue test conditions • Gradients of structural and phase states formed in 08Cr18Ni10Ti steel treated with high-intensity electron beam in the melting mode of the surface layer under high cycle fatigue tests • Conclusion of Chapter 4

Chapter 5: Surface treatment of 20Cr13 steel with the high-intensity electron beam: phase composition, structure and properties • 20Cr13 steel structure before electron beam irradiation • 20Cr13 steel structure treated with the electron beam in the surface melting mode • 20Cr13 steel structure treated with the electron beam with melting of the surface layer • 20Cr13 steel structure treated with an electron beam in the high melting rate mode • Analysis of the dependence of the parameters of the steel structure on the energy density of the electron beam • Conclusion of Chapter 5

Chapter 6: Evolution during fatigue loading of the structural and phase state of 20Cr13 steel formed by electron beam treatment • Evolution of 20Cr13 steel structure, quenched by heating in the furnace and induced by fatigue tests • Evolution of the structure of 20Cr13 steel treated with the electron beam in the surface melting mode and induced by fatigue tests • Evolution of the structure of 20Cr13 steel treated with the electron beam in the melting mode of the surface layer and induced fatigue tests • Evolution of the structure of 20Cr13 steel treated with the electron beam in the high-intensity melting mode • Conclusion of chapter 6

Chapter 7: Structure of 20Cr23Ni18 steel treated with the high-intensity electron beam • Structural-phase state of the steel prior to electron beam irradiation • Modifying the structure of the surface of 20Cr23Ni18 steel during irradiation with high-intensity electron beam • Electron beam irradiation at an energy density of the electron beam of 20 J/cm2 • Electron beam irradiation at an energy density of the electron beam of 30 J / cm2 • Gradient of the structure and phase composition of the surface layer of austenitic 20Cr23Ni18 steel treated with an electron beam in the minimum fatigue life mode • Gradient of the structure and phase composition of the surface layer of austenitic 20Cr23Ni18 steel treated with high-intensity electron beam in the highest possible fatigue life mode • Conclusion of Chapter 7

Chapter 8: Structure of 20Cr23Ni18 steel fractured in fatigue tests • Structural and phase analysis of the mechanisms of fatigue fracture of 20Cr23Ni16 steel not treated with the electron beam • Structural-phase state of 20Cr23Ni16 steel treated with the electron beam (beam power density WS = 0.27 MW/cm2) and fractured as a result of fatigue tests • Structural-phase state of 20Cr23Ni16 steel treated with the electron beam (beam power density WS = 0.4 MW/cm2) and fractured as a result of fatigue tests • Structural-phase state of 20Cr23Ni16 steel treated with the electron beam (beam power density WS = 0.6 MW/cm2) and fractured as a result of fatigue tests

 

About the Authors:

Prof. Viktor Evgen?evic Grornov, Doctor of Physical and Mathematical Sciences, Honoured Scientist of Russia, laureate of the Government in the field of science, head of the Department of Physics of the Siberian State lndustrial University. Author of more than 2700 publications, including 48 monographs. Research interests - materials science, physics, strength and ductility of materials under external radiation.

Prof. Yurii Fedorovich Ivanov, Doctor of Physical and Mathematical Sciences, Senior Research Scientist, Institute of High Current Electronics SB RAS, author and co-author of over 800 scientific works, 8 Russian Federation patents and 20 monographs. Research interests include materials science, physics, strength and ductility of materials under conditions of external radiation, modification of inorganic materials by charged particle beams and plasma flows.

Dr. Sergey Vladirnirovich Vorobiev - doctoral student in physics, Siberian State lndustrial University, author of over 70 publications, including 5 monographs. Research interests - physics and mechanics of fatigue of steels and alloys under the action of external electromagnetic fields and radiation.

Dr. Sergey Valer'evich Konovalov - Associate Professor, the Department of Physics, Siberian State lndustrial University, author of over 500 scientific works, including 10 monographs and 5 patents of the Russian Federation. Area of scientific interests - physics of condensed state, physics of strength and ductility of materials under conditions of external energy effects.