| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
|
Heterostructured and Gradient Materials (HGM VI): Principle, Processing and Properties
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| Presentation Title |
Mechanical Studies of Heterogeneous Nanostructured Inconel 725 |
| Author(s) |
Ikponmwosa Iyinbor, Jin Wang, Ruth Schwaiger, Andrea Hodge |
| On-Site Speaker (Planned) |
Ikponmwosa Iyinbor |
| Abstract Scope |
Heterogeneous nanostructured materials (HNM) have unique properties where recent studies have reported improved strength and ductility synergy. In this study, nanotwinned (NT) HNM Inconel 725 of 8µm and 20 µm thicknesses were synthesized via magnetron sputtering. Subsequent heat-treatment led to the formation of three distinct nanostructured regions: nanocrystalline (NC), NT, and abnormal recrystallization (AR) regions. These regions exhibited an extensive array of nanodomains including abnormally large grains, delta-phase and carbide precipitates, rafted structures, growth and annealing twins, each anticipated to contribute unique responses during deformation. Mechanical behavior of the HNMs was investigated using high-speed nanoindentation mapping (HSNM) and microtensile testing. HSNM technique combined with new criteria that allows for much smaller indentation spacing, facilitated the generation of high-spatial resolution hardness and modulus property maps correlating with the observed microstructure. While microtensile testing provided an understanding of the influence of the nanodomains and their interactions on the observed global deformation behavior. |
| Proceedings Inclusion? |
Planned: |