|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Frontiers in Materials Science, Engineering, and Technology: An FMD Symposium in Honor of Sungho Jin
||Visualizing In-situ Microstructure Dependent Crack Tip Stress Distribution in IN-617 Using Nano-mechanical Raman Spectroscopy
||Yang Zhang, Vikas Tomar
|On-Site Speaker (Planned)
In this research, Inconel 617 (IN-617), a solid solution Ni-Cr-Mo super alloy, was analyzed for microstructure dependent in-situ stress distribution during 3-point bending tests for fracture toughness at elevated temperatures. A novel nano-mechanical Raman spectroscopy measurement platform was designed for temperature, stress, and chemistry mapping at micro to nanoscale for different temperature and load conditions. During the 3-point bending test to measure fracture toughness of micron sized samples, notch tip plastic stresses as a function of microstructure, load, and temperature, with micron scale resolution were measured. The temperature field distribution was correlated to stress distribution and residual microstructure stresses around the area of the notch tip. A new finite element method formulation that incorporated different elastic and plastic material properties from indentation experiments at different locations was validated using the experiments.
||Planned: Supplemental Proceedings volume