This volume contains the edited version of lectures and selected research contributions presented at the NATO ADVANCED STUDY INSTITUTE on MECHANICAL BEHA VI OUR OF MATERIALS AT HIGH TEMPERATURE, held in Sesimbra, Portugal, 12th-22nd September 1995, and organized by 1ST-Lisbon Institute of Technology, PortugaL The Institute was attended by 88 participants, including 15 lecturers from 17 countries including five CP countries. The lecturers were leading scientists and technologists from universities, research institutions and industry. The students were mainly young PhD students and junior academic or research staff with postgraduate qualifications (MSc or PhD). Fourteen students were from the five CP countries. The students presented research papers or posters during the Institute reporting the current progress of their research projects. A total of thirty three lectures, ten research papers and fifty posters were presented. This book does not contain the poster presentations and seven research papers were selected for publication. All the sessions were very active and quite extensive discussions on scientific aspects took place during the Institute. The Advanced Study Institute provided a forum for interaction among scientists and engineers from different areas of research, and young researchers.

Zusammenfassung
Proceedings of the NATO Advanced Study Institute, Sesimbra, Portugal, September 12-22, 1995

Inhalt
I: High Temperature Metallic Alloys.- Overview on monotonic, creep and cyclic stress strain behaviour at high values of strain.- Creep behaviour of engineering alloys.- Development of intergranular damage under high temperature loading conditions.- Defect assessment procedures in the creep range.- Intergranular creep cavitation and fracture.- Elevated temperature fatigue crack growth of nickel base superalloys; A review and modelling.- Fatigue and creep-fatigue behaviour of Ni-base superalloys: Microstructural and environmental effects.- Interaction of high temperature creep with high cycle fatigue.- Creep and creep-fatigue crack growth of high strength steels.- The behaviour of short cracks at elevated temperatures.- Local approach: Numerical simulation of creep crack initiation and growth.- The effect of temperature on the growth of cracks subjected to combined major and minor stress cycles.- II: Engineering Applications of High Temperature Alloys.- Aspects of the assessment of the mechanical behaviour of metallic materials at high temperature.- The behaviour of defects in welds at high temperature.- Developments in creep-fatigue crack initiation and growth procedures in high temperature codes.- Quantitative microstructural assessment of P91 ferritic steel after long term creep at high temperature.- Aeroengine applications of advanced high temperature materials.- Stressing and lifing techniques for high temperature aeroengine components.- III: Thermal-Mechanical Fatigue and Thermal Shock.- Thermo-mechanical deformation of engineering alloys and components Experiments and modeling.- Thermal-mechanical fatigue and thermal fatigue experiments.- Damage modelling in thermal mechanical fatigue.- Analysis of thermal shock and thermal-mechanical fatigue.- Experimentalanalysis of thermal shock.- IV: High Temperature Behaviour of Metal Matrix and Ceramic Matrix Composites.- Crack propagation in metal-matrix composites. I: Interaction of cracks with metal/ceramic interfaces.- Crack propagation in metal-matrix composites. II: Mechanisms of fatigue-crack growth.- Processing structure and high temperature creep of MMCs.- Modelling of high temperature deformation in MMCs.- Temperature and loading rate effects on toughness of in-situ niobium silicide niobium composites.- Sialons and silicon nitrides as high temperature engineering materials; Retrospect and prospect.- Toughened silicon carbides for high-temperature use.- Indentation creep behaviour of glasses and glass-ceramics.- Mechanical properties of mullite at high temperature.- Ceramic matrix composites.- Si3N4-SiC composites prepared by SHS technique.- CMC processing routes for high temperature applications.- Design concepts for CMC structures.- CMC's static and fatigue behaviour at high temperature.- New developments in engineering applications of materials at high temperatures.- CMC component joining.