The Effect of Spatial Heterogeneities on the Transformation Kinetics in Amorphous Al Alloys

Abstract

As part of our continuing study we have discovered that minor (i.e. 1%) solute substitutions to AlYFe amorphous alloys can shift the glass transition temperature, Tg and the crystallization onset, Tx by about 50 K. These changes are correlated with the nucleation delay time. We have developed an innovative method to detect the nucleation delay time. We have identified a double time-temperature transformation (TTT) curve for the crystallization of a Zn based metallic glass (MG). As an application of controlled spatial heterogeneities we have developed a new class of AlSm-based MGs, which show polymer- like thermoplastic formability near the boiling point (100 C) of water.

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Document Details

Document Type
Technical Report
Publication Date
Jun 20, 2019
Accession Number
AD1079106

Entities

People

  • John H. Perepezko

Organizations

  • University of Wisconsin–Madison

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amorphous Materials
  • Boiling
  • Boiling Point
  • Crystallization
  • Electron Microscopy
  • Equations Of State
  • Fiber Spinning
  • Glass Transition Temperature
  • Heat Energy
  • Materials
  • Metallic Glass
  • Phase Transformations
  • Physical Properties
  • Thermodynamic Properties
  • Thermodynamics
  • Transition Temperature
  • Transitions

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.
  • Reinforced Composite Materials