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Reveal H-induced cracking in duplex stainless steel by neutron and x-ray diffraction and imaging

Reference number
Coordinator Kungliga Tekniska Högskolan - Kungliga Tekniska högskolan Skolan f kemi bioteknologi & hälsa
Funding from Vinnova SEK 1 160 000
Project duration November 2021 - March 2024
Status Completed
Venture Research infrastructure - utilisation and collaboration
Call Industrial utilization of neutron and synchrotron light-based technologies in large-scale research infrastructure
End-of-project report 2021-03815_AlleimaEMEA.pdf (pdf, 551 kB)

Important results from the project

The overall purpose is to develop a sample environment and perform operando time-of-flight neutron imaging and diffraction measurement to reveal local distribution of H, strain and microstructure evolution in duplex stainless steel under H charging and tensile loading. Despite of some delay, we have developed the sample environment and performed the neutron measurement at ISIS successfully. Moreover, we have also performed operando synchrotron diffraction measurement at PETRA III. The results from the neutron and synchrotron measurements provide complementary information.

Expected long term effects

We have developed the sample environment and demonstrated the feasibility to utilize the time-of-flight neutron imaging and diffraction technique for in-situ and operando measurement to study hydrogen embrittlement. We will further improve the experiment setup and the hydrogen charging condition by using another electrolyte giving much higher hydrogen ingress in future work. The project promotes industrial utilisation of neutron facilities and also create synergy between neutron and synchrotron facilities by developing sample environments for industrial users.

Approach and implementation

Neutron scattering and synchrotron radiation, the former with a high sensitivity to H and both with a high penetration power, provide unique possibilities to simultaneously detect H, strain, and H damage in metals. The project is a joint effort by corrosion expert at KTH Royal Institute of Technology, neutron expert at ESS, synchrotron expert at Lund University, and material expert at Alleima AB. The combined expertise and good collaboration enabled the development of the sample environment and successful neutron and synchrotron measurements, showing the feasibility of the method.

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

Last updated 26 June 2024

Reference number 2021-03815