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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Deformation and Damage Mechanisms in High Temperature Ni, Co and Fe-based Superalloys
Presentation Title Role of Anisotropic Deformation on the Weld Cracking of a Directionally Solidified Ni-base Superalloy
Author(s) Avinash Prabhu, Sudarsanam Suresh Babu
On-Site Speaker (Planned) Avinash Prabhu
Abstract Scope Directionally solidified high-gamma prime Ni-base superalloys are susceptible to cracking in the heat affected zone during fusion welding processes. In this work, conditions leading to the deformation and fracture behavior in a high gamma prime alloy are considered at a range of elevated temperatures in the longitudinal and transverse direction with respect to the grain direction. Depending on the orientation of the applied stress with reference to crystallographic texture, differing amounts of strains were found to localize in the grain interiors and the boundaries. Transverse applied stresses lead to failure at lower strain at highly misoriented grain boundaries. The measured stress-strain characteristics are used within a finite element software to evaluate the stress evolution and the cracking tendency during fusion welding. The microstructural causes of failure are characterized through a combination of SEM and EBSD.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


A Physics-oriented Creep Damage Model for Single Crystal Superalloys
A Systematic Data-analytics Approach to the Design of Processing Routes for Forged Nickel-based Superalloy Inconel 706
Abnormal Grain Growth upon Annealing of a Hot-worked Ni-base Alloy
Accelerated Design and Testing of New Nickel Superalloys with Increased Creep Resistance
Alloy Design Concepts of Creep-resistant, Alumina-forming Ferrous Alloys for High-temperature Structural Applications
An Overview of the Modeling of Precipitation and Dissolution in Gamma-gamma Prime Nickel-base Superalloys
Are Ni-based SX Superalloys Always Stronger in Creep?
Assessment of the Remaining Creep Life for DZ125 Superalloy Based on Microstructural Degradation
Benchmarking Multi-scale Models with Microtensile Experiments and 3D Microstructural Characterization of René 88DT
Creep Behavior and Microstructural Characterization of Weld Transition Joints between P91 and AISI 304
Deformation and Damage Behavior during LCF, TMF and CF in an Advanced Heat Resistant Austenitic Stainless Steel
Deformation Mechanisms in Polycrystalline Superalloys
Deformation Processing and Recrystallization of Single Crystal Ni-base Superalloys
Design Approaches for Advanced Polycrystalline Ni-base Superalloys
E-18: Atomistic Modeling of Segregation and Diffusion in Ni-based Superalloys
E-19: Effect of Rhenium on Deformation Mechanisms during Creep in Ni-based Single-crystal Superalloys
E-20: Exploring Thermo-mechanical Deformation Mechanism of a NiAl-Cr(Mo) Superalloy by In-situ Neutron Diffraction
E-21: Mechanical and Microstructural Evaluation of Friction Welded Future Nickel Disk Alloys
E-23: Prediction of Incipient Melting Map and γ' Features of Ni-base Superalloys Using Molecular Orbital Method
E-24: Predictive Equations of the Elastic Modulus for Individual γ and γ´ Phases in the Ni-Al-W System
E-25: Probing the Effects of Alloying Elements on Creep Properties Using Simplified Alloy Chemistries
E-26: Tensile Properties and Fracture Behavior of ATI 718Plus Alloy at Room and Elevated Temperatures
Effect of Tertiary Gamma Prime on Dwell Crack Growth Performance of a Recently Developed Co:Ni-base Superalloy
Effects of Ageing on Microstructure, Elemental Distribution and Low Cycle Fatigue Behavior and Corresponding Deformation Mechanisms of Haynes-282 at Elevated Temperatures
Effects of Cr on High-temperature Tensile Properties in High-Ni-containing Austenitic Cast Steels
Effects of Strain Rate and Temperature Variation on Dislocation Structures and Faults in a Polycrystalline Ni-based Superalloy
Grain Boundary Environmental Cracking Resistance in Co/Ni Superalloys
Heteroepitaxial Recrystallization in Polycrystalline Nickel-based Superalloys: Nucleation Mechanism
High Resolution Deformation Mapping Studies of the Deformation of a Ni Superalloy
High Temperature Creep Behavior of a Fe-20Cr-25Ni Based Austenitic Stainless Steel
Influence of Forging Parameters on the Microstructure of Supersolvus Heat Treated Nickel-based Superalloy RR1000
Influence of Long Term Ageing on Deformation and Damage Behavior in Alloy 617
Influence of the Starting Microstructure on the Hot Deformation Behavior of a Low Stacking Fault Energy Ni-based Superalloy
Influence of Thermomechanical Processing and Hot Deformation on Microstructural Evolution towards Building a Comprehensive Model for Dynamic Recrystallization Kinetics in Alloy IN625
Integrated Modeling of Creep in Ni-base Superalloys
Investigation of Deformation Pathways of Gamma’ Phase in Ni-, Co- and Co-Ni-base Superalloys
Investigation on Creep Properties of Alloy 709 (Fe-25Ni-20Cr) at 1023 K
Lattice Misfit and In Situ Synchrotron Creep Deformation of γ/γ′ Co-Al-W-Ta Superalloy Single Crystals
Liquation Mechanisms of a Powder Processed Nickel Superalloy
Mechanical Properties and Deformation Mechanisms of Polycrystalline L12-strengthened Co-based Superalloys
Mechanical Properties and Microstructural Characterization of Inconel Alloy 725 Variants
Microstructural Damage Evolution during High-temperature Creep in Nickel-based Single Crystal Superalloys: A Phase Field Study
Microstructural Investigation and In-situ Neutron Diffraction on Novel Creep-resistant Ferritic Superalloys
New Insights into Rate Limiting Deformation Processes in Ni-base Superalloys
Novel Techniques for Investigation of Cyclic Plasticity in Nickel Base Polycrystals
On the Role of Environmental Damage in Selected Ni-based Superalloys
Oxidation Impact on Fatigue Mechanisms of DS200+Hf Alloy
Peculiar Semi-solid Deformation Behaviour in Co and Ni Alloys: An In Situ X-ray Tomographic Investigation
Portevin-Le Chatelier Effect in Ni-based Superalloys: Experiments and Mechanisms
Processing and Properties of Forged and Cast Haynes 282 Alloy for A-USC Steam Turbine Components
Role of Anisotropic Deformation on the Weld Cracking of a Directionally Solidified Ni-base Superalloy
Strain Induced Excessive Grain Growth in Nickel Base Superalloys
Tailoring the Properties of a Ni-based Superalloy via Modification of the Forging Process: An ICME Approach to Fatigue Performance
The Effect of Forging Parameters on Large Unrecrystallized Powder Features in RR1000 Nickel Base Superalloy
The Effect of γ Particles in γʹ Precipitates on the Mechanical Properties in Ni-Al-Ti Superalloys
The Effects of Aging Heat Treatments on the Mechanical Performance of an Inconel 740 Casting
The Extent of Individual Strengthening Mechanisms in Model Quinary Nickel-based Superalloys
The Performance of a New γ' Bond Coating on Single Crystal René N5 in Sustained Peak Low-cycle Fatigue

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