Mechanics of Metals with Grain Sizes Approaching the Amorphous Limit

Abstract

This PECASE award studied the similarities between amorphous and nanocrystalline alloys, in terms of their structure, thermodynamics, and mechanical properties. Three task lines in alloy design and processing, characterization, and mechanical property testing and optimization, were pursued in parallel, using both experimental and theoretical/computation methods. The work resulted in: (i) A new approach to control the grain size in nanocrystalline alloys, developed through the use of thermodynamic principles of metal glass formation; (ii) identification of critical nanostructural scales at which alloys exhibit optimized properties under high-rate or impact loading conditions, and (iii) introduction of a practical route to optimized nanostructured alloys with scale-up potential.

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Document Details

Document Type
Technical Report
Publication Date
Oct 31, 2009
Accession Number
ADA519533

Entities

People

  • Christopher A. Schuh

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Chemistry
  • Electrodeposition
  • Electron Microscopy
  • Energy
  • Grain Boundaries
  • Grain Size
  • Heat Treatment
  • High Temperature
  • Materials
  • Mechanical Properties
  • Mechanics
  • Monte Carlo Method
  • Simulations
  • Statistical Analysis
  • Test Methods
  • Three Dimensional

Fields of Study

  • Materials science

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Powder metallurgy of Titanium alloys.
  • Research Science/Academic Research

Technology Areas

  • Microelectronics