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Statistical assessment of strain localization informed by digital image correlation coupled with 3D EBSD

Seminar Group: 

Speaker: 

Dr. Marie-Agathe Charpagne

Address: 

Postdoctoral Researcher, Pollock Group
Materials Dept., UCSB

Date: 

Friday, November 13, 2020 - 11:00am

Host: 

Prof. Raphaële Clément

Understanding strain localization in polycrystalline metallic materials is of utmost interest for prediction of mechanical properties such as fatigue. In this study strain localization processes in relation to the 3D microstructure are investigated, in the structural alloy Inconel 718. High Resolution Digital Image Correlation strain measurements are accurately spatially merged with TriBeam 3D Electron backscatter diffraction data in order to determine the relationship between the grain structure and slip localization. Multi-modal data merging and advanced analysis algorithms are employed to statistically study plastic localization events as a function of the 3D microstructure, over large microstructural regions. Quantitative correlations between the amplitude of localization, active slip systems and locations of thousands of individual slip bands and microstructure features (grain boundaries, annealing twin boundaries, triple junctions, quadruple points) will be discussed. Slip localization locations and active slip systems will be discussed in regards to theoretical predictions.

 

For Zoom details, please contact the host at rclement [at] ucsb [dot] edu.