Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Application of Surface Severe Plastic Deformation to Ti Alloys for Microstructural Control and Ductility Improvement" By David A. Brice Purdue MSE Ph.D. Preliminary Exam Advisors: Professor David F. Bahr and Professor Kevin P. Trumble ABSTRACT Titanium alloys are valued due to the high tensile strength in combination with low density. Consequently, there is great interest to improve properties without changing chemical composition of established alloys. Severe plastic deformation (SPD) processing techniques offer a viable way of producing materials with improved mechanical properties. SPD processes, such as equal channel angular pressing (ECAP), tend to produce ultra fine grained (UFG) materials that are free of major flaws like cracks; however, the distribution of grain sizes tends to be very uniform, and contributes to the decrease of ductility in UFG materials. Alternatively, the use of Surface Severe Plastic Deformation (SSPD) processes, such as Shot Peening (SP) produce parts that display increased tensile strength with no noticeable decrease in ductility. This is partly due to the localized deformation that takes place in the volume adjacent to the surface. Date: Friday, August 17, 2018 Time: 9:00 A.M. Place: ARMS 1021