About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Local Chemical Ordering and Its Impact on Mechanical Behaviors, Radiation Damage, and Corrosion
|
| Presentation Title |
Revisiting the Role of Chemical Order on Mechanical Properties of Ni-Cr Solid-Solution Alloy |
| Author(s) |
Shuhei Yoshida, Daiki Tokiwa, Hikaru Saito, Yoji Miyajima, Mitsuhiro Murayama, Nobuhiro Tsuji |
| On-Site Speaker (Planned) |
Shuhei Yoshida |
| Abstract Scope |
This study explores the influence of chemical order on the mechanical properties of Ni–Cr solid-solution alloy. A Ni–33.3 at.% Cr alloy was homogenized at high temperature and subsequently heat-treated at various temperatures and holding times to promote chemical ordering. Electrical resistivity measurements showed that heat treatment at 500 °C resulted in ~5% increases in resistivity after 1–100 h (Stage A) and notable decreases after 200–300 h (Stage B), indicating the progressive evolution of chemical order from short- to long-range. Tensile tests at room temperature revealed that Stage A specimens exhibited ~50 MPa increases in flow stress compared with the as-homogenized material, while the work-hardening ability remained unchanged, whereas Stage B specimens displayed additional 200–300 MPa increases. The increase in the flow stress was attributed to increases in the elastic modulus and lattice friction for dislocation glide as chemical ordering progressed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, Copper / Nickel / Cobalt |