About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XI)
|
Presentation Title |
Unravelling the Strengthening Effects of Strain Gradient and Back Stress on Heterogeneous Materials |
Author(s) |
Ting Zhu, Yin Zhang |
On-Site Speaker (Planned) |
Ting Zhu |
Abstract Scope |
Recent studies of gradient nanotwinned copper, 3D-printed stainless steel and several other heterogeneous materials raise a fundamental question on the role of strain gradient and back stress in controlling the mechanical behavior of these novel materials. Here we combine the mechanics modeling and experiment to unravel the strengthening effects of microstructural gradients and heterogeneities. Quantitative comparison is made between the experimental and modeling results for gradient nanotwinned copper and 3D-printed stainless steel. Our work reveals mechanistic connections between the plastic strain gradients and long-range back stresses that arise from processing- and deformation-induced microstructural heterogeneities. Insights are obtained to promote the strength-ductility synergy in the design of new heterogeneous microstructures. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |