|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Ultrafine Grained Materials IX
||High-Pressure Torsion and Nanoindentation
||Jae-il Jang, In-Chul Choi, Dong-Hyun Lee, Megumi Kawasaki, Terence G. Langdon
|On-Site Speaker (Planned)
Evolution of microstructures and mechanical properties of structural metals and alloys during high-pressure torsion (HPT) process has been an active issue of the research community in both scientific and technological perspectives. While HPT processing can produce higher plastic strains and smaller grain sizes vis-à-vis equal-channel angular pressing (ECAP), the applied strain and resultant microstructure vary locally across the HPT disk, which contrasts with ECAP. Such local changes in the HPT disk have often brought out some difficulties in measuring mechanical characteristics by standard testing method. One of the promising techniques that can overcome these difficulties is instrumented nanoindentation. In this talk, recent nanoindentation studies on HPT-induced changes in local mechanical properties will be introduced. Then, some critical issues remaining unsolved in the related study will be also discussed. *This research was supported by the Human Resources Development program of KETEP grant funded by the Korea government (MOTIE) (No. 20134030200360).