Seminarium Fizyki Materii Skondensowanej

Nano- and micro- scale testings of materials have been a key tool for understanding the different mechanical properties of materials at small scale with respect to bulk ones. Experimental techniques such as nanoindentation, digital image correlation, and uniaxial pillar testing have provided a great wealth of information and insights on the investigation of size effects in mechanical behavior of materials, and a comparison to multiscale modeling approaches. However, a precise comparison to experiments, especially for advanced materials towards extreme conditions' applications, pose stringent requirements on accuracy of both experimental procedures and modeling predictions.In this work, I will focus on the multiscale modeling approaches of high entropy alloys. I will discuss density functional theory, molecular dynamics and continuum plasticity approaches to model these materials, with a focus on experimental comparisons. I will discuss the basic physics and usefulness of machine learning and statistical data science methods, for the applications of nanoindentation and digital image correlation, and several multicomponent alloys, such as equiatomic NiCoCr, FeNiCr, and NiCoCrFeMn.