In this work, we present a three-dimensional ab-initio informed phase-field-dislocation dynamics model combined with Langevin dynamics to investigate glide mechanisms of edge and screw dislocations at finite temperatures in Nb. Over a temperature range of 150 K to 600 K, calculations reveal that the screw dislocation changes its mode of glide at two distinct temperatures. These two temperatures coincide with temperatures at which yield strengths in Nb are observed to become thermally insensitive and athermal, respectively.

The Beyerlein Group is excited to welcome Postdoctoral Scholar Yixi Shen to UC Santa Barbara.  Yixi will focus on studying the development of heterogeneous nanostructured materials using phase fields.  Before joining UCSB, Yixi recieved his Ph.D. in Mechanical Engineering from the University of Florida, studying under Prof. Douglas Spearot.  

Bailey Rhodes, a 3rd-year Ph.D. student co-advised by Profs. Dan Gianola and Irene Beyerlein, has been awarded a National Defense Science and Engineering Graduate (NDSEG) Fellowship. Bailey's research focuses on the coupling of deformation and magnetism in intermetallic alloys.

The program recognizes and supports outstanding graduate students who are pursuing research-based master’s and doctoral degrees in fields within the  DOD's mission. The award provides 3 years of stipend, health insurance, and tuition funding. Congratulations to Bailey on an incredible achievement!