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Precipitation Behavior of Fe-25 At. Pct Co-9 At. Pct Mo Investigated by In-Situ Small-Angle Neutron Scattering and Complementary Methods

  • Symposium: Neutron and X-Ray Studies of Advanced Materials
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Abstract

The precipitation behavior of a nanoscaled intermetallic phase in a martensitic Fe-25 at. pct Co-9 at. pct Mo alloy was investigated by in-situ small-angle neutron scattering (SANS). Solution-annealed samples were heated to 700 °C using different heating rates while successively measuring the scattered intensity. The ratio R of nuclear and magnetic scattering intensity, sensitive to change in the chemical composition of the developing precipitates, was analyzed. Differential scanning calorimetry (DSC) was performed using identical heating rates to gain knowledge of the kinetics of the precipitation reaction. Complementarily, three-dimensional atom probe (3DAP) measurements were conducted to characterize the chemical composition of the precipitates. A good correlation of the evolution of R and the peaks occurring in the DSC curves was found. The onset temperature of the precipitation reaction was determined to be 420 °C.

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Authors and Affiliations

  1. Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, Franz-Josef-Straße 18, 8700, Leoben, Austria

    E. Eidenberger (Ph.D. Student), M. Schober (Ph.D. Student), E. Stergar (Ph.D. Student), H. Leitner (Scientist) & H. Clemens (Professor)

  2. Christian Doppler Laboratory for Early Stages of Precipitation, Montanuniversität Leoben, Franz-Josef-Straße 18, 8700, Leoben, Austria

    H. Leitner (Scientist)

  3. Institute of Materials Research, GKSS Research Centre, Max-Planck Straße 1, 21502, Geesthacht, Germany

    P. Staron (Scientist)

Authors
  1. E. Eidenberger
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  2. M. Schober
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  3. E. Stergar
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  4. H. Leitner
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  5. P. Staron
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  6. H. Clemens
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Corresponding author

Correspondence to E. Eidenberger.

Additional information

This article is based on a presentation given in the symposium “Neutron and X-Ray Studies of Advanced Materials,” which occurred February 15–19, 2009, during the TMS Annual Meeting in San Francisco, CA, under the auspices of TMS, TMS Structural Materials Division, TMS/ASM Mechanical Behavior of Materials Committee, TMS: Advanced Characterization, Testing, and Simulation Committee, and TMS: Titanium Committee.

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Eidenberger, E., Schober, M., Stergar, E. et al. Precipitation Behavior of Fe-25 At. Pct Co-9 At. Pct Mo Investigated by In-Situ Small-Angle Neutron Scattering and Complementary Methods. Metall Mater Trans A 41, 1230–1234 (2010). https://doi.org/10.1007/s11661-009-9997-8

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  • DOI: https://doi.org/10.1007/s11661-009-9997-8

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