| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
|
| Presentation Title |
Phase Evolution of a Spinodal Copper Alloy, Characterized by In Situ Synchrotron X Ray Diffraction |
| Author(s) |
James Hogg, Nicole Church, Annie Andersson, Catherine Dejoie, Howard Stone |
| On-Site Speaker (Planned) |
James Hogg |
| Abstract Scope |
Cu-15Ni-8Sn (wt%) offers excellent mechanical properties through a combination of spinodal decomposition and precipitation of coherent D022 and L12 phases. However, during prolonged thermal exposure, discontinuous precipitation of D0a and D03 phases occurs, deteriorating the mechanical performance. These processes must be understood for judicious selection of processing parameters. Phase evolution has typically been characterized using ex situ transmission electron microscopy and diffraction-based techniques. However, the concurrence of multiple phase transformations with overlapping diffraction signals has compromised studies of the precipitation sequence. In this work, high resolution synchrotron X-ray diffraction has been used to directly track the phase evolution of Cu-15Ni-8Sn (wt%). Data were acquired in situ during ageing over a range of temperatures. The high angular resolution enabled deconvolution of the sidebands formed from spinodal decomposition and the respective diffraction peaks from ordering and discontinuous precipitation. This allowed the precipitate sequence to be determined with a ~2 min time resolution. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Copper / Nickel / Cobalt, Characterization |