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- Wärner, Hugo,1988-Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten (author)
High Temperature Fatigue of Aged Heavy Section Austenitic Stainless Steels
- Article/chapterEnglish2022
Publisher, publication year, extent ...
- 2021-12-23
- Basel, Switzerland :MDPI,2022
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:liu-182258
- https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-182258URI
- https://doi.org/10.3390/ma15010084DOI
Supplementary language notes
- Language:English
- Summary in:English
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Notes
- Funding: AB Sandvik Materials Technology in Sweden; Swedish Energy Agency through the Research Consortium of Materials Technology for Thermal Energy Processes [KME-801]
- This work investigates two austenitic stainless steels, Sanicro 25 which is a candidate for high temperature heavy section components of future power plants and Esshete 1250 which is used as a reference material. The alloys were subjected to out-of-phase (OP) thermomechanical fatigue (TMF) testing under strain-control in the temperature range of 100 ∘C to 650 ∘C. Both unaged and aged (650 ∘C, 3000 h) TMF specimens were tested to simulate service degradation resulting from long-term usage. The scanning electron microscopy methods electron backscatter diffraction (EBSD) and energy dispersive spectroscopy (EDS) were used to analyse and discuss active failure and deformation mechanisms. The Sanicro 25 results show that the aged specimens suffered increased plastic straining and shorter TMF-life compared to the unaged specimens. The difference in TMF-life of the two test conditions was attributed to an accelerated microstructural evolution that provided decreased the effectiveness for impeding dislocation motion. Ageing did not affect the OP-TMF life of the reference material, Esshete 1250. However, the structural stability and its resistance for cyclic deformation was greatly reduced due to coarsening and cracking of the strengthening niobium carbide precipitates. Sanicro 25 showed the higher structural stability during OP-TMF testing compare with the reference material.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Materialteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Materials Engineering hsv//eng
- high temperature austenitic stainless steels
- out-of-phase thermomechanical fatigue
- crack propagation analysis
- electron backscatter diffraction (EBSD)
- energy-dispersive X-ray spectroscopy (EDS)
Added entries (persons, corporate bodies, meetings, titles ...)
- Chai, Guocai,1956-Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten,AB Sandvik Materials Technology R and D Center, Sandviken, Sweden(Swepub:liu)guoch17 (author)
- Moverare, Johan,1973-Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten(Swepub:liu)johmo31 (author)
- Calmunger, Mattias,1986-Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten(Swepub:liu)mathu54 (author)
- Linköpings universitetKonstruktionsmaterial (creator_code:org_t)
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- In:MaterialsBasel, Switzerland : MDPI15:11996-1944
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