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Microstructural evolution and creep of Fe–Al–Ta alloys

  • Petra Prokopčáková , Martin Švec and Martin Palm
Published/Copyright: April 30, 2016
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 107 Issue 5

Abstract

The microstructural evolution in Fe – Al – Ta alloys containing 23 – 31 at.% Al and 1.5 – 2.2 at.% Ta has been studied in the temperature range 650 – 750 °C by annealing for 1, 10, 100 and 1 000 h. The experiments confirm that in this temperature range the precipitation of the stable hexagonal C14 Laves phase is preceded by formation of coherent, metastable L21 Heusler phase precipitates within the Fe – Al matrix. However, precipitates of C14 are observed after much shorter annealing times than previously assumed. Creep strength increases substantially with increasing Al content of the alloys because the solid solubility for Ta in the Fe – Al matrix increases with increasing Al content and solid-solution hardening contributes substantially to the observed high creep strength. It may therefore be that the microstructural changes during creep have no noticeable effect on creep strength.

Keywords: Intermetallics; Microstructure; Precipitation kinetics; Mechanical properties; Creep
*Correspondence address, Dr. Martin Palm, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, D-40237 Düsseldorf, Germany. Tel.: +49(0)211 6792-226, Fax: +49(0)211 6792-360, E-mail:

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Received: 2015-10-20
Accepted: 2016-02-01
Published Online: 2016-04-30
Published in Print: 2016-05-13

© 2016, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Microstructural evolution and creep of Fe–Al–Ta alloys
  5. Creep behaviour characterisation of a ferritic steel alloy based on the modified theta-projection data at an elevated temperature
  6. Facile fabrication, microstructure, and corrosion resistance of high-strength, high-hardness pure bulk aluminum
  7. A method for improving the mechanical properties of a hypereutectic Al–Si alloy by introducing the α-Al phase
  8. Experimental investigation by atomic force microscopy on mechanical and tribological properties of thin films
  9. Influence of ceramic B4C particulate addition on tensile behavior of 6061 aluminum matrix
  10. Role of cerium, lanthanum, and strontium additions in an Al – Si – Mg (A356) alloy
  11. Structural and mechanical study on Mg–xLM (x = 0–5 wt.%, LM = Sn, Ga) alloys
  12. Weibull distribution application on temperature dependence of polyurethane storage modulus
  13. Hierarchical bismuth phosphate microspheres with high photocatalytic performance
  14. Influence of calcination temperature on sol–gel synthesized single-phase bismuth titanate for high dielectric capacitor applications
  15. People
  16. Prof. Dr. Wolfgang Bleck on the occasion of his 65th birthday
  17. DGM News
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https://doi.org/10.3139/146.111357
Keywords for this article
Intermetallics; Microstructure; Precipitation kinetics; Mechanical properties; Creep

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Microstructural evolution and creep of Fe–Al–Ta alloys
  5. Creep behaviour characterisation of a ferritic steel alloy based on the modified theta-projection data at an elevated temperature
  6. Facile fabrication, microstructure, and corrosion resistance of high-strength, high-hardness pure bulk aluminum
  7. A method for improving the mechanical properties of a hypereutectic Al–Si alloy by introducing the α-Al phase
  8. Experimental investigation by atomic force microscopy on mechanical and tribological properties of thin films
  9. Influence of ceramic B4C particulate addition on tensile behavior of 6061 aluminum matrix
  10. Role of cerium, lanthanum, and strontium additions in an Al – Si – Mg (A356) alloy
  11. Structural and mechanical study on Mg–xLM (x = 0–5 wt.%, LM = Sn, Ga) alloys
  12. Weibull distribution application on temperature dependence of polyurethane storage modulus
  13. Hierarchical bismuth phosphate microspheres with high photocatalytic performance
  14. Influence of calcination temperature on sol–gel synthesized single-phase bismuth titanate for high dielectric capacitor applications
  15. People
  16. Prof. Dr. Wolfgang Bleck on the occasion of his 65th birthday
  17. DGM News
  18. DGM News
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