Time-dependent deformation behaviours of two stainless steels at elevated temperature: Correlation between slow strain rate and creep testing

Austenitic stainless steels, such as Sanicro 25 and Sanicro 28, exhibit excellent mechanical properties at elevated temperatures. This study investigates their time-dependent deformation behaviours through two distinct testing methods: slow strain rate tensile (SSRT) and creep testing at 650 °C. Mic...

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Bibliographic Details
Published in:European journal of materials 2024-12, Vol.4 (1)
Main Authors: Xu, Jinghao, Chai, Guocai, Calmunger, Mattias
Format: Article
Language:English
Subjects:
Austenitic stainless steels
creep
fracture analysis
high-temperature deformation
slow strain rate tensile (SSRT)
strain energy rate
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Summary:Austenitic stainless steels, such as Sanicro 25 and Sanicro 28, exhibit excellent mechanical properties at elevated temperatures. This study investigates their time-dependent deformation behaviours through two distinct testing methods: slow strain rate tensile (SSRT) and creep testing at 650 °C. Microstructural analysis revealed that Sanicro 25 has a finer grain structure and superior high-temperature resistance compared to Sanicro 28. The deformation and fac­ture mechanics have been evaluated. A novel strain energy rate approach was developed to correlate SSRT and creep test data, providing insights into the materials’ high-temperature performance. This study offers a new perspective for evaluating and optimizing stainless steels for demanding applications.
ISSN:2688-9277
2688-9277
DOI:10.1080/26889277.2024.2427399