Stress-induced martensitic transformations in NiTi and NiTi-TiC composites investigated by neutron diffraction

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Description

Superelastic NiTi (51.0 at% Ni) with 0, 10 and 20 vol% TiC particles were deformed under uniaxial compression as neutron diffraction spectra were simultaneously obtained. The experiments yielded in-situ measurements of the thermoelastic stress-induced transformation. A detailed Rietveld determination is made of the phase fractions and the evolving strains in the reinforcing TiC particles and the austenite as it transforms to martensite on loading (and its subsequent back transformation on unloading). These strains are used to shed light on the phenomenon of load transfer in composites where the matrix undergoes a stress-induced phase transformation.

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18 p.

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Vaidyanathan, R.; Bourke, M.A.M. & Dunand, D.C. December 31, 1998.

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  • Vaidyanathan, R. Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering
  • Bourke, M.A.M. Los Alamos National Lab., NM (United States)
  • Dunand, D.C. Northwestern Univ., Evanston, IL (United States)

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Description

Superelastic NiTi (51.0 at% Ni) with 0, 10 and 20 vol% TiC particles were deformed under uniaxial compression as neutron diffraction spectra were simultaneously obtained. The experiments yielded in-situ measurements of the thermoelastic stress-induced transformation. A detailed Rietveld determination is made of the phase fractions and the evolving strains in the reinforcing TiC particles and the austenite as it transforms to martensite on loading (and its subsequent back transformation on unloading). These strains are used to shed light on the phenomenon of load transfer in composites where the matrix undergoes a stress-induced phase transformation.

Physical Description

18 p.

Notes

OSTI as DE99002251

Source

  • Other Information: PBD: [1998]

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  • Other: DE99002251
  • Report No.: LA-UR--98-3567
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/334213 | External Link
  • Office of Scientific & Technical Information Report Number: 334213
  • Archival Resource Key: ark:/67531/metadc686363

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Creation Date

  • December 31, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • May 20, 2016, 1:53 p.m.

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Vaidyanathan, R.; Bourke, M.A.M. & Dunand, D.C. Stress-induced martensitic transformations in NiTi and NiTi-TiC composites investigated by neutron diffraction, report, December 31, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc686363/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.