Multiresolution Mechanical Characterization of Ti alloys using Spherical Indentation Stress-Strain Protocols and Bayesian Inference of Single Crystal Elastic-Plastic Properties
Abstract
This project has successfully developed and demonstrated novel protocols for estimating the most important crystal level elastic-plastic properties for a large range of aTi alloys at different material length/structure scales. The data gathered from these protocols provided valuable quantitative insights into the dependence of salient microstructure features on the multiresolution properties exhibited by the different alloys. These tasks were accomplished using a combination of (i) multiresolution measurements of local mechanical responses using spherical indentation stress strain protocols (with indented zone size varied systematically in the range of 50 nm to500 microns), (ii) corresponding multiresolution characterization of the material structure at the relevant length scales using electron microscopy and back-scattered diffraction, (iii) multiresolution simulations of the indentation experiments using crystal plasticity finite element models, and (iv) estimations of the desired fundamental material properties at different length scales by matching the measurements and corresponding simulations using a suitable statistical learning approach with uncertainty quantification. The unique datasets and tools produced in this work have opened completely new avenues of research into multiscale studies of heterogeneous material systems, spanning the material and component length scales.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 10, 2022
- Accession Number
- AD1230444
Entities
People
- Surya R. Kalidindi
Organizations
- Georgia Tech Research Corporation