A New Class of Solid-Solid Phase Transformations Involving a Composition-Dependent Displacive Component (Preprint)

Abstract

Solid-solid displacive, structural phase transformations typically undergo a discrete structural change from the parent to the product phase. Coupling electron microscopy, three-dimensional atom probe, and first-principles computations, we present the first direct evidence of a novel mechanism for a coupled diffusional-displacive transformation in an important class of titanium-molybdenum alloys wherein the displacive component in the product phase changes continuously, as a function of its composition. These results cannot be explained by conventional theories and have wide implications.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2011
Accession Number
ADA548962

Entities

People

  • A. Devaraj
  • G. B. Viswanathan
  • H.L. Fraser
  • J. S. Tiley
  • Natasha Gupta
  • R. Banerjee
  • R. E. Williams
  • R. Srinivasan
  • S. Nag
  • S. Srinivasan
  • Srutarshi Banerjee

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Alloys
  • Crystal Structure
  • Density Functional Theory
  • Electron Microscopy
  • Elements
  • Materials
  • Materials Science
  • Metals
  • Microscopy
  • Molybdenum
  • Molybdenum Alloys
  • Phase
  • Phase Transformations
  • Solid Phases
  • Three Dimensional

Readers

  • Computational Fluid Dynamics (CFD)
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene