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Meeting 10th International Symposium on Superalloy 718 and Derivatives (2023)
Symposium Superalloy 718 and Derivatives
Presentation Title Correlating Alloy 718 and Haynes 282 Solidification Microstructures to Local Thermal History using Laser Powder Bed Fusion Process Monitoring
Author(s) Andrew E. Wessman, Timothy Smith, Yi Zhang, Fan Zhang, Thomas Spears, John Middendorf, Mohammed Shafae, Nazmul Hasan
On-Site Speaker (Planned) Andrew E. Wessman
Abstract Scope Additive manufacturing processes such as laser powder bed fusion produce material by localized melting of a powder feedstock layer by layer. The small meltpools and high energy density generate very different microstructures in nickel superalloys when compared to more traditional cast or wrought processing, including features such as cellular structures and epitaxial grain growth. The features of these microstructures vary depending on local thermal history, alloy chemistry and processing parameters. In this work in-situ monitoring of a laser powder bed fusion process is used to characterize the local thermal conditions throughout an AM build for alloys IN718 and Haynes 282, and this information is correlated to observations on the microstructural features of these alloys in the as-built condition. In IN718, segregation of niobium and molybdenum are found in interdendritic regions of the 200nm wide cellular precipitate structures, while in Haynes 282 segregation of gamma prime forming elements such as titanium and aluminum segregate to the interdendtritic cell walls. In-process monitoring using thermal tomography is utilized to observe the local thermal conditions during the solidification of the AM material and correlate those conditions to the microstructures formed through computational modeling of the segregation and dendrite formation. Results for both IN718 and Haynes are compared.
Proceedings Inclusion? Definite: At-meeting proceedings


Abnormal Grain Growth Maps of Wrought Ni-base Superalloys
Alloy Design and Development of a Novel Ni-Co Based Superalloy GH4251
An ICME Framework to Predict the Microstructure and Yield Strength of INCONEL 718 for Different Heat Treatments
Application of Computational Materials and Process Modeling to Current and Future Aero-engine Component Development and Validation
Applied Calphad to IN718 and its Cast & Wrought Successors - a Physics Based Approach with Implications for Phase Stabilities, Precipitation and Microstructural Modeling
Characterization of Laser Powder Bed Fusion of Nickel Based Superalloy Haynes 282
Characterization of the Anisotropic Behaviour of Inconel 718 Parts Manufactured by Wire Arc Additve Manufacturing
Characterization of γ′ Precipitation Behavior in Additively Manufactured IN738LC Superalloy via In-situ Small-angle Neutron Scattering
Chemical Mapping of Superalloys at the Nanoscale
Compatibility of Wrought Superalloys with Supercritical CO2
Competitor Ti-comprising Refractory High Entropy Alloys to Superalloy 718 for Aeroengine Applications
Correlating Alloy 718 and Haynes 282 Solidification Microstructures to Local Thermal History using Laser Powder Bed Fusion Process Monitoring
Design of Graded Transition Interlayer for Joining Inconel 740H Superalloy with P91 Steel using Wire-arc Additive Manufacturing
Effect of Heat Treatment on the Mechanical Property and Deformation Mechanism of a Novel Cast Nickel-base Superalloy
Effect of Pre-straining on the Tensile and Stress-rupture Properties of a Novel Ni-Co Based Superalloy
Effect of Short-term Isothermal Exposure on the Ductility Signature of Waspaloy in the Temperature Range of 750-950°C – A Comparison with Haynes® 282®
Effects of High-temperature Oxidation on Fatigue Life of Additive-manufactured Alloy 625
Effects of Scan Strategy Induced Microstructural Differences on Thin-wall SLM IN718 Fatigue Performance
Fabrication and Weldability Aspects of Ni- and Ni-Fe Based Superalloys – A Review
Factors Influencing Propensity for Stress Relaxation Cracking in Inconel ® Alloy 740H® and Practical Guidance for Applications
High-temperature Properties of Alloy 718 Made by Laser Powder-bed Fusion
Hot Corrosion Behavior of a GH4720Li Disk Superalloy at 700℃
In-situ HT-EBSD Measurements and Calibration of Multi-class Model for Grain Growth and δ-phase Dissolution Kinetics of Alloy 718
IN718 Cold Gas Repair Spray of Large Cavities – Microstructure and Residual Stresses
Influence of Morphology and Size Distribution of Haynes 230 Particles on the Powder Spreading Behavior and Performance on Selective Laser Melting
Investigating Deformation Mechanisms in a Creep-deformed 718-variant Superalloy
Investigating the Influence of Build Parameters and Porosity on Fatigue of AM IN718
Keyhole TIG Welding of New Co-lean Nickel-based Superalloy G27
Linking Stress Rupture Properties to Processing Parameters of HAYNES® 718 Nickel Superalloy via Machine Learning
Local Assessment of Mechanical Properties in Forged Alloy 718 Components Based on the Simulation of the Microstructure Evolution During Production
Long Term Thermal Stability and Oxidation Resistance of HAYNES 233 Alloy
Manufacturing Large Superalloy Pipe Bends
Mechanical and Microstructural Properties of Brazed Honeycomb Liner Material Haynes 214
Meeting the Challenges of the Future by Understanding Our Past
Microstructural and Tensile Properties Evolutions of Direct-aged Waspaloy Produced by Wire Arc Additive Manufacturing
Microstructural Stability and Strengthening Mechanism of a Ferritic Fe-Cr-Ni-Al Superalloy Containing Cuboidal B2 Nanoparticles
Microstructure and Mechanical Properties of Selective Laser Melting Processed TiC/GTD222 Nickel-based Composite
Microstructure Evolution During Post-heat Treatment of Haynes 282 Alloy Processed by Wire-arc Additive Manufacturing
Multi-variate Process Models for Predicting Site-specific Microstructure and Properties of Inconel 706 Forgings
Preferential γ' Precipitation on Coherent Annealing Twin Boundaries in Alloy 718
Segregation and Freckles in Alloy 718 and Related Alloys
Subcritical Crack Growth of 718 Alloy in Marine Exposure Conditions and Microstructural Modeling
Surface Roughness of Additively Manufactured IN718 & H282 Superalloys from Multi-size and Multi-laser Machines
Tailoring the γ- γ′-γ″ Dual Superlattice Microstructure of Ni-based Superalloy IN725 by High Temperature Aging and Nb/Ta Additions for Superior Creep Properties
Tensile Performance of Direct Energy Deposited IN718 and Oxide Dispersed Strengthened IN718
Tensile Properties of Inconel 718 Produced by LMD-Wire
The Effect of Microstructure on the Strength of VDM Alloy 780
Towards Enhancing Hot Tooling to Form High -𝛾′ Superalloys
Understanding Annealing Behavior during Post-build Heat Treatment of Ni-based Alloys Across Additive Manufacturing Processes

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