| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XI)
|
| Presentation Title |
Role of UFG-shell Network on Improving Mechanical Properties in Harmonic Structure Materials |
| Author(s) |
Kei Ameyama |
| On-Site Speaker (Planned) |
Kei Ameyama |
| Abstract Scope |
The Harmonic Structure (HS) is a heterogeneous microstructure with a spatial distribution of ultra-fine grains (UFG) and coarse grains (CG), that is, the CG areas (‘Core’) embedded in the matrix of three-dimensionally continuously connected network of UFG areas (‘Shell’). The HS materials such as pure-Ni, pure-Cu, austenitic stainless steels, etc, samples were fabricated by powder metallurgy route consisting of mechanical milling (MM) of the powders and subsequent sintering. It was found that the fraction of a “shell” area is an important parameter controlling the balance of the mechanical properties of the HS compacts. The HS with a higher fraction of “shell” area demonstrated higher strength and approximately similar elongation as compared to the homogeneous samples and HS samples containing low shell fraction. Moreover, it is noteworthy that the strain hardening behaviour of HS samples strongly depends grain size gradient in the “shell” area. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |