High-resolution characterisation of secondary carbide precipitation in martensitic steels

Reference number 2018-04412
Coordinator Swerim AB - Swerim AB, Kista
Funding from Vinnova SEK 500 000
Project duration November 2018 - November 2019
Status Ongoing
Venture Research infrastructure - utilisation and collaboration
Call Industriella pilotprojekt för neutron- och fotonexperiment vid storskalig forskningsinfrastruktur 2018

Purpose and goal

The purpose with this project is to broaden the work made in a related project called “Framtidens materialdesign”, which couples high-resolution microscopy with computational techniques in order to validate tools for alloy development. In this project Small Angle Neutron Scattering (SANS) is applied on commercial low alloyed steels and tool steels. Focus is on the early stages of carbide precipitation, which gives experimental difficulties since the carbides are normally a few nanometers in size.

Expected results and effects

Commercial low alloyed structural steels produced by SSAB, or tool steels by Uddeholm, are often quenched and hardened, and additional strength from carbide precipitation. The industrial need with this project is to understand the carbide formation process in martensitic steels, and high-resolution microscopy like SANS provides valuable data to validate the computational tools. The expected effect after project end is that these tools can be used for material development of other grades as well.

Planned approach and implementation

The aim of the proposed work is to provide additional and missing information on carbide precipitation. In-situ experiments of carbide precipitation during continuous heating are planned. In addition, using methods like small angle neutron scattering (SANS) provides average data from large volumes that complements more local measurements techniques like TEM and APT, and is valuable input to computational work on precipitation kinetics. Experiments are planned at ISIS Neutron and Muon source (UK), and participating partners are SSAB EMEA AB, Uddeholms AB, Chalmers Technical University and Swerim AB.

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