In situ determination of aging precipitation in deformed Fe-Cu and Fe-Cu-B-N alloys by time-resolved small-angle neutron scattering

Title

In situ determination of aging precipitation in deformed Fe-Cu and Fe-Cu-B-N alloys by time-resolved small-angle neutron scattering

 Author

He, S.M.
Van Dijk, N.H.
Paladugu, M.
Schut, H.
Kohlbrecher, J.
Tichelaar, F.D.
Van der Zwaag, S.

Faculty

Applied Sciences

 Date

2010-11-12

 Abstract

We performed in situ time-resolved small-angle neutron scattering (SANS) measurements on high-purity Fe-Cu and Fe-Cu-B-N alloys during isothermal aging at 550 °C in order to study the potential self-healing of deformation-induced defects by nanosized Cu precipitation. Three different samples with 0%, 8%, and 24% prestrain were used to study the influence of variable defect levels on the Cu precipitation kinetics. The time-resolved SANS measurements show the presence of two contributions corresponding to spherical precipitates and precipitation at dislocations and/or interfaces, as confirmed by complementary transmission electron microscopy experiments. For the Fe-Cu alloy, prestrain was found to accelerate the formation of spherical precipitates in initial aging stage and lead to a significant enhancement of copper precipitation at dislocations and/or interfaces. For the Fe-Cu-B-N alloy, the addition of boron and nitrogen accelerates the formation of spherical precipitates but suppresses the precipitation along dislocations in the prestrained samples.

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 DOI

https://doi.org/10.1103/PhysRevB.82.174111

 Publisher

American Physical Society

 ISSN

1098-0121

 Source

http://prb.aps.org/abstract/PRB/v82/i17/e174111

 Source

Physical Review B, 82 (17), 2010

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

(c) 2010 The Author(s); American Physical Society
Files
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