Effect of carbon on copper precipitation in deformed Fe-based alloys studied by positron annihilation spectroscopy

Title

Effect of carbon on copper precipitation in deformed Fe-based alloys studied by positron annihilation spectroscopy

 Author

Zhang, S.
Schut, H.
Brück, E.
Van der Zwaag, S.
Van Dijk, N.H.

Faculty

Applied Sciences

 Date

2013-06-10

 Abstract

The role of deformation-induced defects and carbon addition on the copper precipitation during aging at 550 oC is investigated in high-purity Fe-Cu-B-N-C alloy samples by Coincidence Doppler Broadening. In samples with 0% and 8% cold pre-strain, the influence of tensile pre-deformation on the precipitation kinetics of copper is studied. The deformation-induced defects are found to enhance the Cu precipitation kinetics. A sharp reduction in open volume defects is accompanied with a strong increase of Cu signature during the initial stage of aging, implying that the open defects (mainly dislocations) act as nucleation sites for Cu precipitates. A comparison of the time evolution of S-W plots between Fe-Cu, Fe-Cu-B-N, and Fe-Cu-B-N-C alloys indicates that the addition of carbon does not alter the Cu precipitation mechanism but decelerates the kinetics.

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http://resolver.tudelft.nl/uuid:4e70b4a1-abd6-477c-8c36-cd32607e2820

 DOI

https://doi.org/10.1088/1742-6596/443/1/012027

 Publisher

IOP Publishing

 ISSN

1742-6596

 Source

http://iopscience.iop.org/1742-6596/443/1

 Source

Journal of Physics: Conference Series, 443 (012027), 2013

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

(c) 2013 The authors
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Published under licence by IOP Publishing Ltd
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