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Shuying Chen

Shuying Chen is a fifth-year graduate student in the Materials Science and Engineering (MSE) Department at the University of Tennessee, Knoxville (UTK). Prior to joining UTK, Ms. Chen studied the mechanical properties of the refractory high entropy alloy (HEA) AlxNbTiMoV at the University of Science and Technology in Beijing, China, receiving her Master of Science degree in 2014. Ms. Chen’s research under the direction of Prof. Peter Liaw is mainly focused on the serrated flow mechanism and fatigue behavior in Al0.5CoCrCuFeNi and TaNbHfZrTiHEAs. The temperature and strain rate effects on the compression, tension, fracture stress, and creep-life of Al0.5CoCrCuFeNi HEAs are currently being investigated to establish statistical models for serration behaviors.  TaNbHfZrTi alloys are being investigated using the experimental techniques of scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM) along with complementary computational techniques such as finite element analysis (FEA) and statistical calculations.  The goal of these investigations is to predict the fatigue life and understand the dislocation structure evolution during non-monotonic loading. Characterization tools including atom probe topography (APT) and high-energy synchrotron X-ray diffraction and neutron diffraction are being employed for studying phase transformations and determining the structure of HEAs down to the nanoscale, such as nano-particles, slip bands, twinning, and interactions of dislocations. These characterization studies combined with computer modeling could potentially provide in-depth mechanisms for plastic deformation and precursors to fracture of serrations within these application-attractive materials. Ms. Chen’s presentations include an MSE departmental seminar and the TMS 144th, 145th, 146th, and 147thannual meetings.