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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Thermo-mechanical Response of Materials with Special Emphasis on In-situ Techniques
Presentation Title Order-disorder Transition in 18-carat Gold Studied by In Situ X-ray Scattering
Author(s) Marina Garcia-Gonzalez, Steven Van Petegem, Ana Diaz, Fanny Lalire, Helena Van Swygenhoven
On-Site Speaker (Planned) Marina Garcia-Gonzalez
Abstract Scope 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.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


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Analysis of Longitudinal Twinning in 𝛾-TiAl by Micropillar Compression up to 700 C with Strain and Crystal Orientation Mapping
Combinatorial In Situ Micromechanics of the Al-Cu System at Low Temperatures
Deformation Mechanisms of Cu/Nb Nanoscale Metallic Multilayers as a Function of Temperature and Layer Thickness
Deformation of Monatomic Metallic Glasses Processed through In-situ Ultrafast Liquid Quenching
Design and Fabrication of MEMS-based Symmetric Structure for In-situ Nanomechanical Tensile Experiments
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Experimental Techniques to Asses Long Range Internal Stresses in Plastically Deformed Crystalline Solids
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High throughput Study of Underlying Mechanisms of Serrated Flow in Nickel-based Diffusion Multiple via High Temperature Nanoindentation
In-situ Deformation and Characterisation of Carbon Controlled Steels
In-situ ECCI Characterization of Microstructural Defects and their Effect on Superconducting Properties of SRF Cavity Niobium
In Situ Observation on Temperature Dependence of Martensitic Transformation and Plastic Deformation in Superelastic NiTi Alloy
In Situ TEM Imaging and Quantitative Orientation Mapping of the Structural Evolution in Nanocrystalline Metals during Mechanical Deformation
Investigating Irradiation Creep by In Situ TEM
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Mechanical Behavior of Stainless Steel 709 through In-situ Synchrotron Diffraction
Mechanics of Irradiated Alloys Studied through In Situ TEM Testing
Metals under High-pressure, High Temperature and during Plastic Deformation: In-situ Studies of Thermo-mechanical Response by Neutron and Synchrotron Quantum Beams
Nanomechanical Properties of Graphene Oxide and Carbon Nanotube Scaffolds
Order-disorder Transition in 18-carat Gold Studied by In Situ X-ray Scattering
Phase Transformation during Thermal Treatment of Medium Mn Steels Studied by In-situ Synchrotron Experiments and Thermodynamic Modeling
Predicting Bulk Mechanical Properties of Ferritic-martensitic Steel Using In-situ TEM Tensile Experiments and Crystal Plasticity Modeling
Rationalization of Heterogeneous Creep Deformation Behavior of Dissimilar Metal Welds
Real Time 3-D X-ray Computed Micro-tomography Study of the Strength and Toughness of Nuclear Graphite between 25° and 1000°C
Size Effects in Ion-irradiated 800H Steel at High Temperatures Utilizing Microcompression Testing
Studying Tensile Properties of Silicon via In-situ Microcompression Testing of Push-to-pull Pillar
Studying the Micromechanics of Martensitic Phase Transformatons Using High Energy Diffraction Microscopy
The Effect of Strain Rate on the Tensile Properties of Single Crystal Ni – an In Situ Study
“In Situ” Measurement of Electrical Resistivity, Dilatometry and Thermal Analyses of Cast Iron

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