Threshold States of Materials and Components: (Materials Science Monographs)

"The Complex Programme of Scientific Engineering Progress of the COMECON Member Countries up to the Year 2000" has underlined the urgent need to intensify material, technological and constructional activities, to utilize unconventional materials and their production procedures, as well as computing techniques, so as to ensure the COMECON countries effectively utilize sources of raw materials, energy and human resources, preserving or possibly enhancing the environment in the process. The demands raised in connection with performance, speed, endurance and reliability will continue to be put forward, in designing machines, equipment and structures. Many components, nodes and constructions are being dynamically loaded in operation under various thermal conditions, under the action of various media and power fields. This results in exposure to failure and damage of components and nodes much more often than under the sole action of mechanical load. This volume gives an assessment of 33 forms of failure and damage of materials and components under the influence of these causes enabling the author to set up the systematics of threshold states, with certain limits.

Table of Contents:
1. Introduction. 2. Threshold State. Development and definition of concept. Definition of threshold state. Systematics of threshold states. Modelling and application of computing technique. 3. Strain. Physical concept of deformation. Microplastic deformation. Macroplastic deformation. Relaxation of stresses. Elastic-plastic buckling. 4. Fracture by Overstressing. Physical concept of fracture formation. Brittle fracture. Ductile fracture. Creep fracture. Fracture under overload by impact. Fracture under thermal-deformation shock. Corrosive splitting under stress. Delayed fracture. Premature fracture. 5. Fatigue Fracture. Phenomenology of the fatigue curve. Mechanical fatigue. Thermal fatigue. Thermal-mechanical fatigue. Creep and fatigue. 6. Volume Damage Sustained by Components. Introductory remarks. Damage by hydrogen. Damage by intercrystalline corrosion. Damage by liquid metal. Damage to welds and weldments. Damage by radiation. Body swelling. Damage by energy fields. 7. Surface Damage of Components. Component surfaces and degradation. Damage by adhesion. Damage by abrasion. Damage by erosion. Damage by cavitation. Contact damage. Fretting. Damage by corrosion. Thermal damage and burning. Damage by pick-up. Damage by power beams. 8. Conclusion. References. Subject Index.