Woodruff School of Mechanical Engineering
Faculty Candidate Seminar
Microstructure control of bulk and surface forms by severe plastic deformation
Dr. Christopher Saldana
Pennsylvania State University
Monday, February 10, 2014 at 11:00:00 AM
MRDC Building, Room 4211
Dr. Thomas Kurfess
The functional performance of structural components is strongly dependent on characteristics of microstructure that ultimately determine mechanical and physical properties of the bulk and surface. Severe plastic deformation methods have been established to facilitate sub-micron refinement of microstructure with significant improvements in strength, wear resistance and superplasticity. Unfortunately, conventional severe plastic deformation methods provide limited access to specialized combinations of strain, strain rate and temperature that are needed to engineer diverse microstructure types. As in conventional severe plastic deformation methods, the deformation intrinsic to chip formation in machining is also characterized by large strains and varying levels of strain rate, temperature and hydrostatic pressure. These parameters can be varied over a significantly wider envelope when compared to conventional methods, enabling systematic studies of large strain deformation phenomena including those present at high strain rates. In this presentation, these aspects of severe plastic deformation, particularly as they apply to the engineering of ultrafine-grained and/or nanocrystalline materials and surfaces for structural applications, are discussed.
Dr. Christopher Saldana is an assistant professor of Industrial and Manufacturing Engineering at The Pennsylvania State University, where he holds the Harold and Inge Marcus Career Professorship and an affiliate appointment with Mechanical and Nuclear Engineering. He earned his B.S. degree (2004) from Virginia Tech and his M.S. (2006) and Ph.D. (2010) degrees from Purdue University. Dr. Saldana has received several awards for his research and commercialization efforts, including an NSF CAREER award, an R&D100 technology award and a Burton D. Morgan entrepreneurial competition award.
Refreshments will be served.