Kinetic Processes in Advanced Alloys

Abstract

A study was made of kinetic processes in advanced alloys, in particular prediction of terminal solid solubility extension and grain size in rapidly solidified alloys, and dispersoid formation, stability, and interaction with interfaces. Existing criteria for predicting terminal solid solubility extension were found inadequate. A new criterion based on the Miedema coordinates of electron potential and density was found to have excellent predictive power for Al-based alloys and to show promise for Mg-based and Ti- based alloys. A simple model was developed which for the first time allows easy prediction of grain size in rapid massive solidification of alloys. The model is in agreement with most existing data on massively solidified RS pure metals and alloys. Equations are derived for stability of compound dispersoid particles against coarsening and against dragging by grain boundaries. Keywords: Titanium; Intermetallic; Rapid solidification; Thermodynamics; Dispersoid.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1989
Accession Number
ADA212049

Entities

People

  • Kenneth C. Russell

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Crystal Chemistry
  • Crystal Structure
  • Electron Density
  • Electrons
  • Fluids
  • Grain Size
  • Heat Energy
  • Heat Of Fusion
  • Latent Heat
  • Materials
  • Materials Laboratories
  • Materials Science
  • Particles
  • Phase Diagrams
  • Phase Transformations
  • Thermodynamics

Fields of Study

  • Materials science

Readers

  • Computational Fluid Dynamics (CFD)
  • Computational Modeling and Simulation
  • Materials Science and Engineering.

Technology Areas

  • Microelectronics