About this Abstract |
Meeting |
Advances in Welding and Additive Manufacturing Research 2022
|
Symposium
|
Advances in Welding and Additive Manufacturing Research 2022
|
Presentation Title |
Nature Inspired Metallic Material Design for Tunable Mechanical Properties |
Author(s) |
Vanshika Singh, Yousub Lee, Peeyush Nandwana, Sudarsanam Suresh Babu, Michael Kirka |
On-Site Speaker (Planned) |
Vanshika Singh |
Abstract Scope |
Nature provides ample examples wherein different configurations of fundamental units lead to different functional outcomes. Based on this idea, we hypothesize that the random configuration of unit lattices in metals might lead to different mechanical responses. Hence, this study aims to understand the correlation between the unit lattice volume and random configuration and its effect on the mechanical stress response. To demonstrate the concept, we designed two phase metallic systems having FCC matrix and BCC precipitates wherein BCC phase is randomly distributed in the matrix according to mathematical rules based on random walk. As per this method, each new random BCC voxel chosen is dependent on the location and direction of the precursing BCC voxel. The mechanical response was calculated using a finite element analysis at the mesoscale scale. A total of eight different arrangements of 33% BCC voxel volume were randomly distributed within the FCC matrix. The size of the computational domain was 30×30×30 mm3 for the FCC matrix and 1×1×1 mm3 for individual BCC voxel. A unit compressive displacement was applied to the block to calculate the mechanical response of the lattice configuration. The prediction showed an increase in the strain hardening of the hybrid material relative to pure FCC. The increase in maximum stress under unit displacements varies from 32-40% for eight different arrangements compared to under only FCC. The variation in mechanical stress responses for different BCC arrangements concurs our hypothesis that random configurations of fundamental units might lead to change in the strain responses. Additionally, to demonstrate such material design’s manufacturability, blown powder direct energy deposition (DED) will be leveraged to print the part with ferritic (BCC) and austenitic (FCC) steels with multiple different configurations. |
Proceedings Inclusion? |
Undecided |