Online Lecture by Dr. Niels van Dijk

Small Angle Neutron Scattering on Precipitation in Steels

Fundamental Aspects of Materials and Energy group
Delft University of Technology
The Netherlands

Title:
Small Angle Neutron Scattering on Precipitation in Steels.

Abstract:
My research mainly focuses on neutron scattering and synchrotron X-ray studies on metal alloys and magnetic materials. In this presentation the use of neutron scattering to study the kinetics of nanoscale precipitation in steels will be discussed.

Nanoscale precipitates are extensively used to strengthen metal alloys. In order to optimise this process detailed information on the precipitate size distribution is required. Destructive techniques like transmission-electron microscopy and atom-probe tomography provide highly detailed information on individual precipitates in a limited volume. Small angle neutron scattering (SANS) on the other hand provides non-destructive in-situ information on the nanoscale particle size distribution of a relatively large sample volume (typically 10-100 mm^3). The high penetrating power of the neutrons allow for in-situ time-resolved experiments that can monitor the evolution of the precipitate size distribution as a function of aging time at elevated temperatures.

The SANS method will be introduced and several applications for iron alloys and nanosteels will be discussed.

This session will be chaired by prof. Leo Kestens (Ghent University)

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