| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Neutron and X-ray Scattering in Materials Science and Engineering
|
| Presentation Title |
Elucidating the phase evolution of a spinodal Au-Pt-Pd alloy using in situ synchrotron X-ray diffraction |
| Author(s) |
James Hogg, Ming En Pek, Hannah Cole, George Wise, Catherine Dejoie, Nicholas Jones, David Collins, Howard Stone |
| On-Site Speaker (Planned) |
James Hogg |
| Abstract Scope |
Age-hardenable Au-Pt alloys are widely used in viscose rayon spinnerets due to their excellent corrosion resistance in sulfuric acid. However, such alloys are constrained to compositions with sufficiently wide solution treatment windows for reliable processing. This limits the attainable strength and thus the resistance to the abrasive action of dye particles in the viscose solution. In the present work, a ternary Au-Pt-Pd alloy with a superior balance of strength and processibility has been developed. To understand the microstructural origins of strengthening and guide ageing treatments, its phase evolution at a range of temperatures has been characterised in situ by high resolution synchrotron X-ray diffraction. The high angular resolution enabled deconvolution of the diffraction signals due to spinodal decomposition from those due to deleterious discontinuous precipitation of the two equilibrium cubic phases. The temporal evolution of the diffraction data is discussed in terms of the fundamental theories of the respective phenomena. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Characterization, Other |