Jakub Holzer

Experimental studies of the interplay of plasticity and magnetism in alpha-iron and chromium

Školitel: Assoc. Prof. Roman Gröger

Instituce: Brno University of Technology, CEITEC VUT

Obor: Advanced Materials and Nanotechnologies

 

O mém projektu

Ferromagnetic alpha-Fe and antiferromagnetic Cr crystallize in the body-centered cubic structure that exhibits internal magnetic order. These metals have received very little attention despite the fact that they are important ingredients in dilute ferroalloys Fe(1-x)Cr(x) with x<14%, which are model materials for the development of ferritic/martensitic steels with applications in fusion reactors. A limited knowledge exists about the low-temperature plastic behavior of high-purity single crystals of alpha-Fe, whereas similar studies on Cr are nonexistent. Moreover, the role of magnetism on the plastic response of these metals has never been elucidated. The aim of this project is to fill the gap in knowledge about the coupling of magnetism and plasticity in alpha-Fe and Cr by carrying out detailed low-temperature experiments on high-purity single crystals of both metals under tension and compression for many loading directions. The slip morphology will be characterized using the Nomarski technique of differential interference contrast (light microscopy), electron microscopy (both SEM and TEM), atomic force microscopy, and combined with magnetic force microscopy measurements on as-received and magnetized samples to quantify the interactions between magnetism and plasticity in these materials. The obtained results will constitute a complete database of experimental knowledge that will serve to formulate reliable flow criteria for both metals.