| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments III
|
| Presentation Title |
Influence of Annealing Atmosphere on Microstructural Evolution and Variations in Mechanical Properties and Electrical Conductivity During Isochronal Annealing in a Nanocrystalline Cu-Zr Alloy |
| Author(s) |
Takahiro Kunimine, Takeshi Inamura, Shuhei Yamaguchi, Naoya Nishikawa, Reza Gholizadeh, Nobuhiro Tsuji |
| On-Site Speaker (Planned) |
Takahiro Kunimine |
| Abstract Scope |
The wire drawn Cu-Zr alloy with tensile strength of 2.2 GPa possesses highest tensile strength in Cu alloys. Cu-Zr alloys also possess high thermal stability in Cu alloys. Cu-Zr alloys are promising materials as a thermal conductive material in extreme environments. In our previous study, a nanocrystalline Cu-Zr supersaturated solid-solution (SSS) alloy can be synthesized by applying the high-pressure torsion (HPT) processing on a hypoeutectic Cu-2.7at.%Zr alloy due to the mechanical dissolution of the Cu5Zr phase. Here, we report on influence of annealing atmosphere on microstructural evolution and variations in mechanical properties and electrical conductivity during isochronal annealing in a nanocrystalline Cu-2.7at.%Zr SSS alloy. The nanocrystalline Cu-Zr alloy demonstrated excellent mechanical properties even after high temperature annealing up to approximately 820 K in a vacuum environment due to the excellent thermal stability. However, degradation of the nanocrystalline Cu-Zr Alloy was accelerated after annealing in air due to the oxidation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Copper / Nickel / Cobalt, Characterization, Mechanical Properties |