About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
|
| Presentation Title |
F-42: Formation Behavior of Cr2Nb Phase in Cu-4Cr-2Nb Alloy Produced by L-PBF Process |
| Author(s) |
Wakana Honda, Shinya Imano, Daisuke Ando, Yuji Sutou |
| On-Site Speaker (Planned) |
Wakana Honda |
| Abstract Scope |
Cu-4Cr-2Nb（at.%）alloy developed by NASA (National Aeronautics and Space Administration) is a promising Cu alloy that combines high strength and high conductivity. Recently, the Cu-4Cr-2Nb alloy manufactured by Laser Powder Bed Fusion (L-PBF) process has been attracted attention because the alloying elements can be well dissolved in the Cu matrix phase in L-PBF and sufficient hardening can be obtained by subsequent aging. This study investigated the microstructural changes of Cu-4Cr-2Nb alloy that occur before and after L-PBF process and during post-aging treatment. The L-PBFed alloy was aged at 200–600 °C for 2 h in an Ar atmosphere. XRD results suggested that Cr2Nb phase, which existed in the alloy powder, was melted by L-PBF process and then formed again during aging. The observation suggested that bcc-Nb phase existed in the as-built sample changes to Cr2Nb phase by aging. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Copper / Nickel / Cobalt, Additive Manufacturing, Phase Transformations |