About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Heterostructured and Gradient Materials (HGM IV): Tailoring Heterogeneity for Superior Properties
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Presentation Title |
Backstress Development and Strain Partitioning in Harmonic-structure Materials |
Author(s) |
Dmytro Orlov, Roman Kulagin, Yan Beygelzimer |
On-Site Speaker (Planned) |
Dmytro Orlov |
Abstract Scope |
A new class of multifunctional high-performance Heterostructured and Gradient Materials (HGM) have been emerging recently. Harmonic-Structure (HS) materials that can be produced by bottom-up architecting from powder metals, feature bi-modal distribution of grain sizes arranged into a continuous 3D-skeleton from ultrafine-grains (UFG) with coarse-grain (CG) inclusions. They have been proven among top-performing HGMs, but further property optimisation is restricted by the limited understanding of HS mechanics. We recently developed a simple yet powerful analytical model for evaluating backstress development and strain partitioning between CG and UFG components in HS materials. The model captures specifics of topology in HS under mechanical loading allowing quantitative analysis of critical parameters from simple calibration experiments. The analysis of experimental data from HS nickel reveals favourable strain partitioning between CG / UFG along with the build-up of back-stress on their interfaces allowing the material performance to exceed expectations from the rule of mixtures. |
Proceedings Inclusion? |
Planned: |