Markus Chmielus, PhD

505 Benedum Hall | 3700 O’Hara Street | Pittsburgh, PA 15261 P: 412-624-8176

chmielus@pitt.edu www.chmieluslab.org Associate Professor

Advanced Manufacturing & Magnetic Materials – AM³

The work of Dr. Chmielus’s research group is focused on the influences and relationship of composition, impurities, manufacturing, and processing parameters on the microstructure and properties of structural and multifunctional metals in bulk, foam, thin films, and single crystalline form with a focus on 3D structures produced by additive manufacturing. In additive manufacturing, we work on identifying the effects of powder properties, printing and processing parameters on green and further processed (e.g. sintering and aging) samples’ microstructure, porosity, residual stresses, mechanical, fatigue and multifunctional properties. We focus on all aspects of binder jet 3D printing and sintering but also use direct energy deposition, and selective laser melting/sintering and built custom-made printers for very small print volumes and magnetic materials. We have expertise working with a large variety of materials including Ni-based, Ti-, Cr-Co-alloys and other biocompatible materials, steels, carbides, multifunctional Heusler alloys. The main focuses of this research group in functional materials is in ferromagnetic shape-memory alloys, high temperature shape memory, and magnetocaloric materials. We are mostly interested in microstructure, phase transformations, mechanical, thermal, magnetic properties. Since composition, impurities, manufacturing and processing parameters have an essential effect on the microstructure and properties of samples, we investigate the relationship between them and how to reach an optimum combination of desired properties. For functional materials, we work with poly- and single-crystalline materials and 3D structures produced via additive manufacturing. Micro-computed x-ray tomography (top left) is used to identify and quantify porosity and flaws. In metal thin films and coatings, we are mostly interested in the effects of impurities and processing parameters on as-deposited films, but also phasetransformations, texture transformations and final properties, including resistivity, magnetization, texture, and mechanical properties. Furthermore, we investigate stresses during deposition and cycling. We use custom-made equipment, if necessary, during all stages of research (left bottom), characterize microstructure, stress, other properties at Pitt and collaborators facilities or in collaboration with large user facilities and national labs (e.g. for synchrotron and neutron diffraction techniques).