LE BUT DE CETTE ETUDE EST DE DETERMINER LA COMPOSITION DES MATERIAUX DESTINES A LA CONSTRUCTION DES AUBES DE TURBINES. ETUDE DE LA COMPOSITION ET DES CONDITIONS DE SOLIDIFICATION DONC DE LA MICROSTRUCTURE D'ALLIAGES EXPERIMENTAUX DE COMPOSITIONS VOISINES D'ALLIAGES COMMERCIAUX. COMPORTEMENT EN FATIGUE DES MONOCRISTAUX CHOISIS PARMI LES ALLIAGES ETUDIES POSSEDANT UNE TEMPERATURE DE SOLIDUS EGALE OU SUPERIEURE A 1330C. CORRELATION ENTRE L'ENDOMMAGEMENT EN FATIGUE ET LA MICROSTRUCTURE

In the past twenty years, new experimental approaches, improved models and progress in simulation techniques brought new insights into long-standing issues concerning dislocation-based plasticity in crystalline materials. During this period, three-dimensional dislocation dynamics simulations appeared and reached maturity. Their objectives are to unravel the relation between individual and collective dislocation processes at the mesoscale, to establish connections with atom-scale studies of dislocation core properties and to bridge, in combination with modelling, the gap between defect properties and phenomenological continuum models for plastic flow. Dislocation dynamics simulations are becoming accessible to a wide range of users. This book presents to students and researchers in materials science and mechanical engineering a comprehensive coverage of the physical body of knowledge on which they are based. It includes classical studies, which are too often ignored, recent experimental and theoretical advances, as well as a discussion of selected applications on various topics.

Presents all the main aspects of the microstructure of nickel-base superalloys, and includes micrographs chosen from among a large range of commercial and academic alloys, from the as-cast product to in-situ components, worn from in-service use. Including more than 100 illustrations, the text explains all the transformation mechanisms involved in the origination (creation) of microstructures during solidification or heat treatments (crystallization paths, segregation, crystal orientation, precipitation, TCP, coarsening and rafting, etc.). It includes up-to-date information and data such as phase diagrams, crystallographic structures, and relationships with functional properties. Nearly 300 references provide a key to further investigation.

The 14th International Symposium on Superalloys (Superalloys 2020) highlights technologies for lifecycle improvement of superalloys. In addition to the traditional focus areas of alloy development, processing, mechanical behavior, coatings, and environmental effects, this volume includes contributions from academia, supply chain, and product-user members of the superalloy community that highlight technologies that contribute to improving manufacturability, affordability, life prediction, and performance of superalloys.