High-Temperature Behavior of Metals

Dear Colleagues,

The design of new alloys or metal-based composites as well as the optimization of processes involving whichever form of high-temperature deformation cannot disregard the characterization and/or modelling of the high-temperature structural response of the material.

If this has been quite extensively investigated (but not always completely understood or described) for conventional hot working processes, there is still a lot to do to accumulate data and models and properly manage innovative deformation processes including more complex time and temperature combinations, where process-related microstructural changes can severely affect the same processability of the material as well as its final properties (structural or functional).

Similar considerations hold in the case of conventional or innovative metallic materials, where ‘high-temperature deformation’ occurs as a consequence of high-temperature service of the structural components. If extensive scientific literature is available for conventional material and for ‘conventional’ service conditions reproduced by the constant load creep test condition, there is still a lot to do in the field of alloy and processing design in view of widening the temperature and loading ranges of existing or innovative materials, including improving the characterization methods and data for material behavior under complex service conditions (i.e., stress relaxation, environmental effects and combination of repeated cycles, presence of flaws) and modelling high-temperature material behavior in all these situations, while considering the need of extended ranges of applicability of these models. The knowledge of the effects on the initial microstructure as well as the microstructural changes taking place during in-service deformation are of course of paramount importance for the optimization of high-temperature structural alloys.

The main focus on the Special Issue ‘High-Temperature Behavior of Metals” is to collect contributions dealing with a wide range of metallic materials and presenting the recent advances in the field of high-temperature structural behavior of metallic materials, which is of interest during both the manufacturing and the service stages of the components’ life and which is intimately linked to microstructural features, their evolution with deformation or exposure time, and thus other material characteristics of potential interest for specific applications.

Prof. Dr. Stefano Spigarelli
Prof. Dr. Elisabetta Gariboldi
Guest Editors

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