Effect of Crystal Fraction on Hardness in FINEMET and NANOPERM Nanocomposite Alloys

Abstract

Nanocrystallization kinetics of a FINEMET (Fe71.1Si18.5B6.3Nb3Cu1.1) and a NANOPERM alloy (Fe91Zr7B2) were studied and the variation of mechanical properties (hardness) with volume fraction of the crystalline (VFC) phase determined. Time-dependent magnetization and hysteresis loop measurements were used to determine VFC for FINEMET and NANOPERM, respectively. Kinetic results are presented to provide the information necessary to interpret the hardness measurements. Hardness was measured by nanoindentation as a function of VFC to investigate the effect of the evolution of the nanocomposite structure on the mechanical properties. Strengthening mechanisms to understand the linear increase of hardness with the increase of VFC are presented.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2005
Accession Number
ADA511374

Entities

People

  • C. Um
  • F. Johnson
  • J. Barrow
  • M. E. Mchenry
  • M. Simone

Organizations

  • Carnegie Mellon University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Analysis
  • Crystal Structure
  • Crystallization
  • Crystals
  • Curie Temperature
  • Electron Microscopy
  • Engineering
  • Grain Size
  • Hardness
  • Laboratory Magnetometers
  • Magnetic Properties
  • Materials
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Nanocomposites
  • Standards

Fields of Study

  • Materials science

Readers

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