Startseite Analysis of defect configurations with positron lifetime measurements by pulsed low energy beams
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Analysis of defect configurations with positron lifetime measurements by pulsed low energy beams

Dedicated to Professor Eckard Macherauch on the occasion of the 80th anniversary of his birth
  • W. Egger , G. Kögel , P. Sperr und H.-J. Gudladt
Veröffentlicht/Copyright: 31. Mai 2013
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 97 Heft 12

Abstract

To understand the damage behavior of mechanically deformed metallic materials in more detail, the kind of defect and its concentration have to be known. In addition, the kinetics of decomposition and of precipitation hardening are influenced by the presence of defects and the corresponding concentration. Consequently, an analysis of dominating defects would be helpful. Compared with well known techniques, positron annihilation spectroscopy offers the opportunity for lifetime measurements that are characteristic for special kinds of defects, e.g. dislocations, small vacancy clusters and micro-voids. To detect the spatial distribution and to determine the concentration of defects, the low energy pulsed positron beam technique can be used. This technique, in combination with the scanning positron microscope, opens a broad field of applications for defect analysis in metallic and ceramic materials.

Keywords: Positron annihilation; Lifetime measurement; Cyclic deformation; Defect determination
* Correspondence address, Prof. Dr. H.-J. Gudladt, Universität der Bundeswehr München, Fakultät für Luft und Raumfahrttechnik, Institut für Werkstoffkunde, D-85577 Neubiberg, Germany, Tel.: +498960042534. E-mail:

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Received: 2006-4-28
Accepted: 2006-9-12
Published Online: 2013-05-31
Published in Print: 2006-12-01

© 2006, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Basic
  4. Microcracks in superalloys: From local in-situ measurements to lifetime prediction
  5. Residual stress development due to thermal cycling of the particle-reinforced alloy EN AW-6061– experiment and simulation
  6. Analysis of defect configurations with positron lifetime measurements by pulsed low energy beams
  7. The nature of the TRIP-effect in metastable austenitic steels
  8. Investigation and modelling of theplasticity-induced martensite formation in metastable austenites
  9. Thermal relaxation of residual stresses in TiN films deposited by arc ion plating
  10. On the Hall–Petch relation between flow stress and grain size
  11. Polymer-derived Si–C–N ceramics reinforced by single-wall carbon nanotubes
  12. Applied
  13. Strengthening of silicon nitride ceramics by shot peening
  14. Assessment of creep behaviour of the die-cast cylinder-head alloy AlSi6Cu4-T6
  15. New aspects of bending rotation fatigue in ultra-fine-grained pseudo-elastic NiTi wires
  16. Anwendung des lokalen Dauerfestigkeitskonzepts zur Bewertung der Wirksamkeit von Schweißnahtnachbehandlungsmaßnahmen
  17. Investigation of the thermoelastic response of long-fibre reinforced thermoplasticsby comparison with different non-contactstrain measurement techniques
  18. Effect of surface roughening on increasingthe spectral selectivity of cermet solarselective absorbers
  19. Experimental observations on thecorrelation between microstructure andfracture of multiphase steels
  20. Pressure solidification – a novel moulding technique for plastic parts with superior dimensional stability
  21. DGM News
  22. DGM News
https://doi.org/10.3139/146.101394
Schlagwörter für diesen Artikel
Positron annihilation; Lifetime measurement; Cyclic deformation; Defect determination

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Basic
  4. Microcracks in superalloys: From local in-situ measurements to lifetime prediction
  5. Residual stress development due to thermal cycling of the particle-reinforced alloy EN AW-6061– experiment and simulation
  6. Analysis of defect configurations with positron lifetime measurements by pulsed low energy beams
  7. The nature of the TRIP-effect in metastable austenitic steels
  8. Investigation and modelling of theplasticity-induced martensite formation in metastable austenites
  9. Thermal relaxation of residual stresses in TiN films deposited by arc ion plating
  10. On the Hall–Petch relation between flow stress and grain size
  11. Polymer-derived Si–C–N ceramics reinforced by single-wall carbon nanotubes
  12. Applied
  13. Strengthening of silicon nitride ceramics by shot peening
  14. Assessment of creep behaviour of the die-cast cylinder-head alloy AlSi6Cu4-T6
  15. New aspects of bending rotation fatigue in ultra-fine-grained pseudo-elastic NiTi wires
  16. Anwendung des lokalen Dauerfestigkeitskonzepts zur Bewertung der Wirksamkeit von Schweißnahtnachbehandlungsmaßnahmen
  17. Investigation of the thermoelastic response of long-fibre reinforced thermoplasticsby comparison with different non-contactstrain measurement techniques
  18. Effect of surface roughening on increasingthe spectral selectivity of cermet solarselective absorbers
  19. Experimental observations on thecorrelation between microstructure andfracture of multiphase steels
  20. Pressure solidification – a novel moulding technique for plastic parts with superior dimensional stability
  21. DGM News
  22. DGM News
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