Evolution of Precipitation in the new Hybrid Steel

Reference number 2018-04433
Coordinator CHALMERS TEKNISKA HÖGSKOLA AKTIEBOLAG - Institutionen för fysik
Funding from Vinnova SEK 490 000
Project duration November 2018 - November 2019
Status Ongoing
Venture Research infrastructure - utilisation and collaboration
Call Research infrastructure - utilisation and collaboration: Industrial pilot projects for neutron and photon experiments at large scale research infrastructures - 2018

Purpose and goal

The newly developed Hybrid Steel relies on combined strengthening by carbides and intermetallic precipitates. The steel has high strength, good corrosion resistance and excellent fatigue properties. The purpose of the project is to improve the understanding of the precipitation hardening process and the parallel evolution of carbides and intermetallic precipitates during heat treatment. A separate goal is also to asess the usefulness of this type of experiments for R&D in the Swedish metal industry.

Expected results and effects

With the photon experiments we will be able to follow the parallel evolution of carbides and intermetallic particles during heat treatment, regarding size and crystal structure. This information will make it possible to tailor the heat treatment to obtain the desired properties, which will aid Ovako´s customers and widening the areas of application for this steel.

Planned approach and implementation

The experiments will be performed at a series of temperatures for times up to a few hours. The first choice is to use the Swedish Beamline (P21) at Petra III, Hamburg. The project is a collaboration between Ovako and Chalmers Technical University, building on previous ex-situ studies using TEM, APT and lab-scale SAXS and measurements of mechanical properties. The idea is to perform combined in-situ small-angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS), to follow the size distribution of the precipitates while at the same time having information about the crystal structure.

The project description has been provided by the project members themselves and the text has not been looked at by our editors.