ProgramMaster Logo
Conference Tools for 2017 TMS Annual Meeting & Exhibition
Login
Register as a New User
Help
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Gamma (FCC)/Gamma-Prime (L12) Co-Based Superalloys II
Presentation Title Phase Stability, Element Partitioning and Atomic Site Location in Co-9Al-9W-2X Alloys
Author(s) Li Wang, Michael Oehring, Uwe Lorenz, Andreas Stark, Florian Pyczak
On-Site Speaker (Planned) Florian Pyczak
Abstract Scope In the Co–Al–W system the γ’–L12 phase can be stabilized by the addition of W and other alloying elements. In this study alloy samples with nominal compositions Co-9Al-9W-2X (X=Ti, Nb, V, Ta, Cr, Ni and Mo, at. %) were produced by arc-melting. The partitioning behavior of the alloying elements in γ and γ’ phases were investigated in dependence on temperature by energy-dispersive X-ray spectroscopy in the transmission electron microscopy in quenched specimens. In order to analyze the element occupation at atomic sites, atom location by channeling enhanced microanalysis technique was applied. The results from annealing experiments show that after 5000 hours at 900 C, B2–CoAl and D019–Co3W phases form in all alloys except Co-9Al-9W-2V. The amount, shape and type of these phases depend on the alloying element addition. Details about the partitioning behavior and the atomic site occupation of alloying elements in these alloys will be discussed in the presentation.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A High-throughput Search for New Ternary Superalloys
An Update on Cobalt Based Co-Mo-Al –X Alloys with γ-γ’ Microstructure: Effect of Alloying Additions, Mechanical Properties and Interaction with Different Environments
Analyzing the Tension/Compression Asymmetry in Creep Deformed Single Crystal Co-base Superalloys
Calphad Design of Co-based Gamma-prime-strengthened Superalloys
Coarsening Kinetics and Elemental Partitioning of (f.c.c.) Gamma Plus (L12) Gamma-prime-strengthened Co-base Superalloys
Coating Systems for New Cobalt Base Single Crystals
Creep Behavior in a γ′ Strengthened Co-Al-W-base Single Crystal Superalloys
Deformation Microstructures of L12 Ordered Intermetallic Phases in Ni-, Co- and Co-Ni-base Superalloys
Developing Polycrystalline Ni-Co Rich Alloys, Strengthened by Co3AlW L12 Gamma Prime Precipitates for High Temperature Applications
Dislocation Interactions during High-temperature Creep and Yield of Polycrystalline Co-Ni-Al-W-based Superalloys and L12 γ’ Phases
Double Minimum Creep of a Ta-containing Single Crystal Co-base Superalloy
Elemental Partitioning Behaviour in Ni-Co-Al-Ti-Cr Alloys
Gammaprime Precipitation in Model CoAlW Alloys
Influence of Alloy Composition on Oxide Scale Formation in Novel Co-Based γ-γ’ Superalloys
Influence of Replacement of Ta by Nb in a γ/γʹ- structure Co Base Superalloys
Integrated Computational Materials Engineering of Co Bushing Alloy
Load Transfer between Phases during Deformation of Superalloys
Mechanical Behavior of Polycrystalline (L12)gamma-prime-strengthened Co-base Superalloys
Mechanical Properties of Co-based Superalloys with FCC+L12 Two-phase Microstructures
Modeling Precipitate Coarsening in Cobalt-based Superalloys
Multi-scale Modelling of High-temperature Deformation Mechanisms in Co-Al-W-based Superalloys
Novel Cast and Wrought γ/γ’ Cobalt Base Superalloys - Creep Properties, Deformation Mechanisms, and Oxidation
On the Role of the Base Elements Co and Ni in γ'-hardened Superalloys
Phase Stability, Element Partitioning and Atomic Site Location in Co-9Al-9W-2X Alloys
Planar Defect Formation in the γ' Phase during High Temperature Creep in Single Crystal CoNi-base Superalloys
Properties of γ'-phase in L12-precipitation Hardened Co-base Alloys with Different W-content
Role of Two Phase Microstructure during Early Stages of High Temperature Oxidation of Co-base Superalloys
Solid Solution Strengthening of Co3(Al, TM) L12 Phase: An Integrated First-principles Calculations and Experimental Study
Solute-vacancy Binding Energies and Diffusion Rates in fcc Cobalt: A First-principles Database
Structural Stability of L12 and TCP Phases in Co-based Superalloys
Superlattice Intrinsic Stacking Fault Energies and Solute Segregation to Planar Defects in Co-based Superalloys
Supersolvus Thermomechanical Processing of Cast Co–Base Superalloys
The Grain Boundary Pinning Effect of the μ-phase in Polycrystalline L12 Hardened Co-base Superalloys
The Influence of Cr in γ' Strengthened Co-base Superalloys
The Microstructure and Hardness of Ni-Co-Al-Ti-Cr Quinary Alloys
Thermodynamic Database for the Co-Al-W-Ni-Ti-Ta-Cr Superalloy System
Thermodynamics and Kinetics of L12-containing Co-base Superalloys from First-Principles
γ’-strengthened Co-Base Alloys – Development and Challenges

Questions about ProgramMaster? Contact programming@programmaster.org