| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
A Grain Level Investigation of Ductile Failure using High-energy X-ray Characterization |
| Author(s) |
Diwakar Naragani, Jun-Sang Park, Peter Kenesei, Michael D. Sangid |
| On-Site Speaker (Planned) |
Michael D. Sangid |
| Abstract Scope |
Ductile failure through the growth and coalescence of voids is of particular relevance for many engineering materials. Yet, the lack of experimental measures of the mechanical state of the material at the appropriate length scale has limited further understanding of ductile failure. In this study, we explore local grain-scale measures for their relevance as a physical basis for ductile failure. The heterogeneous micromechanical state created around voids due to grain interactions is captured via far-field high-energy diffraction microscopy in IN718 samples manufactured via selective laser melting. These experiments determine narrow bands of (i) low stress triaxiality, at the onset of failure, which highlight the path of coalescence through inter-void shearing and (ii) intragranular plasticity, strain heterogeneity, and high triaxiality to form a criteria for coalescence through inter-void necking. |
| Proceedings Inclusion? |
Undecided |