|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Thermo-mechanical Response of Materials with Special Emphasis on In-situ Techniques
||Order-disorder Transition in 18-carat Gold Studied by In Situ X-ray Scattering
||Marina Garcia-Gonzalez, Steven Van Petegem, Ana Diaz, Fanny Lalire, Helena Van Swygenhoven
|On-Site Speaker (Planned)
The manufacturing of parts made of gold alloys usually involves a series of mechanical and thermal treatments, needed to shape the parts and to obtain good mechanical properties. It is well established that the thermo-mechanical processing of 18 carat red gold causes the build-up of residual stresses, leading to shape distortion or fracture It is anticipated that the equiatomic AuCu order/disorder phase transformation plays a major role in this issue. In this work we present results obtained from an in situ small angle x-ray scattering experiment that aims to characterize the nucleation and growth kinetics of ordered nanoprecipitates as a function of Ag/Cu ratio, disordering temperature and cooling rate. These fast in situ measurements are complemented by post-mortem electron microscopy, residual stress measurements by neutron diffraction and hardness characterization.
||Planned: Supplemental Proceedings volume