About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Heterostructured and Gradient Materials (HGM V): New Mechanistic Discoveries Enabling Superior Properties
|
Presentation Title |
Mechanics of Extremely Heterogeneous Materials |
Author(s) |
Ting Zhu |
On-Site Speaker (Planned) |
Ting Zhu |
Abstract Scope |
Recent development of heterogeneous materials such as eutectic high-entropy alloys processed by additive manufacturing and gradient nanotwinned metals produced by electro-deposition raises fundamental questions on the role of extremely fine microstructural heterogeneities in controlling mechanical behavior of these novel material systems. We combine mechanics modeling and experimental characterization to unravel the extra strengthening effects of microstructural gradients and resultant plastic strain gradients and back stresses relative to their homogeneous counterparts. Quantitative comparison is made between modeling and experimental results, highlighting the less appreciated notions of different types of back-stress hardening or different stages of extra hardening that operate in materials with extremely complex microstructural heterogeneities. Mechanistic insights are gained toward further enhancement of the strength-ductility synergy in extremely heterogeneous materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Entropy Alloys, Mechanical Properties |