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Type Dmitrieva, O.; Choi, P.; Gerstl, S.S.A.; Ponge, D.; Raabe, D.
  Publication Pulsed-laser atom probe studies of a precipitation hardened maraging TRIP steel Volume Journal Article
Pages 2011
  Abstract Ultramicroscopy  
  Corporate Author Special Issue: 52nd International Field Emission Symposium  
Publisher 111  
Editor 6
  Summary Language 623-627 Series Editor Pulsed-laser atom probe tomography; Local electrode atom probe; Microanalysis; Field evaporation; Precipitation hardened steels; Solute clustering  
Abbreviated Series Title A precipitation hardened maraging TRIP steel was analyzed using a pulsed laser atom probe. The laser pulse energy was varied from 0.3 to 1.9 nJ to study its effect on the measured chemical compositions and spatial resolution. Compositional analyses using proximity histograms did not show any significant variations in the average matrix and precipitate compositions. The only remarkable change in the atom probe data was a decrease in the ++/+ charge state ratios of the elements. The values of the evaporation field used for the reconstructions exhibit a linear dependence on the laser pulse energy. The adjustment of the evaporation fields used in the reconstructions for different laser pulse energies was based on the correlation of the obtained cluster shapes to the TEM observations. No influence of laser pulse energy on chemical composition of the precipitates and on the chemical sharpness of their interfaces was detected.
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0304-3991 no NU @ karnesky @ 11236
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