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SCCAM - Residual stresses and SCC in additively manufactured stainless steel by neutron diffraction

Reference number
Coordinator SWERIM AB - Swerim AB, Kista
Funding from Vinnova SEK 500 000
Project duration March 2020 - December 2021
Status Ongoing
Venture Research infrastructure - utilisation and collaboration
Call Industrial pilot projects for the utilisation of neutron and photon based techniques at large-scale infrastructures - Autumn 2019

Purpose and goal

This joined project between Quintus Technologies and Swerim is aimed to determine the effect of hot isostatic pressing (HIP) post-processing on the performance of additively manufactured (AM) stainless steel. The deep internal residual stress before and after HIPing will be measured using neutron diffraction at ISIS neutron facility (UK). The measured stress will be linked to the stress corrosion cracking (SCC) behavior of material before and after HIPing. The results will support Quintus Technologies in the selection of suitable post-processing routines for AM SS materials.

Expected results and effects

- Demonstrate the potential of neutron diffraction for mapping of internal residual stress/strain in AM SSs. - Determine the effect of HIP post-processing on internal stress/strain in the AM SSs. - Find the link between the measured stress/strain and SCC behavior. - Provide Quintus Technologies with information about the effectiveness of HIP post-processing for the AM SSs operating in the harsh conditions. - Contribution to safe usage of AM SSs in harsh environments by finding the best post-processing routines for optimizing their SCC resistance. resistance.

Planned approach and implementation

- Selection of as-printed and HIP-treated AM SS samples prepared by Quintus Technologies for another ongoing Vinnova project (focused on SCC and performed in collaboration with other Swedish industry). - Performing measurements at the ISIS neutron facility in UK. - Analysis of results to obtain residual stress for samples before/after HIPing. - Analysis of the effect of HIPing on residual stresses and their possible connections with SCC. - Discussion of the ways to optimize the HIPing process with Quintus Technologies. - Spreading of the results via Swerim´s industrial network.

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

Last updated 15 June 2021

Reference number 2019-05304

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