Use of the CSA to Calculate Phase Diagrams and Coherent Inter-Phase Boundary Energies of Multi-Component Nickel-Based Alloys

Abstract

Computational thermodynamics coupled with key experiments rapidly accelerate the development of multi-component phase diagrams. These diagrams act as road maps for selecting alloy compositions and processing parameters for solidification and heat treatments in order to achieve desirable performance such as their mechanical properties and oxidation-resistance. In this report, we obtain a thermodynamic description of Ni-AI-Cr-Pt via extrapolation from descriptions of the constituent binaries and those of key ternaries. The reliability of the description obtained was validated using experimental results obtained in this study. In addition, we also completed a description of Ni-AI-Cr-Ru initiated in an earlier program. We also demonstrated that the method used by us in calculating the inter-phase boundary (IPB) energies between y(fcc) and y'(L 12) in binary Ni-AI[2006Cao) is able to calculate those between y and y' in ternary Ni-AI-Cr [2006Cao1]. We can thus conclude that this method can be used to calculate IPB energies between y and y' in multi-component Ni-base alloys.

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Document Details

Document Type
Technical Report
Publication Date
Mar 02, 2009
Accession Number
AD1026532

Entities

People

  • Chuan Zhang
  • Jun Zhu
  • Weisheng Cao
  • Y. A. Chang

Organizations

  • University of Wisconsin–Madison

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemistry
  • Crystal Structure
  • Detectors
  • Diffraction
  • Energy
  • Heat Energy
  • Heat Treatment
  • Materials
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Phase Diagrams
  • Phase Transformations
  • Solid Solutions
  • Thermodynamics

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.
  • Theoretical Analysis.