Design of precipitation hardenable magnesium alloys

Global sustainability demands the development of light, strong, and tough metals that can contribute to drastically reduce emissions while facilitating mobility and that can be produced in an economically viable manner. Magnesium, with a density that is two thirds that of aluminum, one fourth that of steel and only slightly higher than that of many polymers, has long been regarded as the ideal substitute for heavier metals, but its comparatively poorer mechanical behavior has limited its application. The potential of…

Seminar Eric Jägle: Alloys for Additive Manufacturing, Alloys by Additive Manufacturing

  Dr. Eric Jägle (Max Planck Institute of Metal Research in Düsseldorf, Germany)   As Additive Manufacturing technologies are being adopted in more and more industries, the focus of research and development is shifting to the materials in use. On the one hand, limited processability of high-performance materials restrict the robustness of the process in some cases, while in other cases the best materials for a given application cannot be processed at all. There is a strong need to modify…

Seminar Jorge Alcalá: Multi-scale mechanistic interpretations to indentation experiments across the material length scales: from continuum to atomistics

Prof. Jorge Alcalá (Universitat Politècnica de Catalunya) We provide a fundamental contact mechanics background to the interpretation of spherical indentation experiments performed in polycrystalline aggregates, single crystalline units, thin films, and minute material scales comprising an atomistic ensemble. A central issue under examination is the extraction of mechanical properties from hardness measurements as well as from instrumented indentation applied load-penetration depth curves performed in all such material lengths. Our analyses shed light into the role of the plasticity mechanisms (dislocation slip…

Nuevo acero ferritico martensitico endurecido por nanoprecipitacion

Carlos Capdevila (Centro Nacional de Investigaciones Metalúrgicas CENIM-CSIC) Los aceros ferríticos/martensíticos son candidatos como materiales estructurales para aplicaciones a alta temperatura en los futuros reactores de fusión y fisión. La principal ventaja de estos aceros con respecto a otras aleaciones usadas a elevada temperatura como los aceros austeníticos y superaleaciones  es su buena conductividad térmica. La principal limitación que ofrecen es su  baja resistencia a alta temperatura la cuál limita su temperatura de servicio. El acero ferrítico/martensitico más usado actualmente…