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Microstructure and mechanical properties of thin-walled ODS ferritic steel tubes fabricated by a near-net forming method.
- Source :
-
Materials Science & Engineering: A . May2024, Vol. 899, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- This research successfully applied a new near-net forming process for producing thin-walled ODS ferritic steel tubes. The process involves hot isostatic pressing (HIP), hot extrusion (HE), and Pilger-rolling (PR). The tubes produced have a length of 2800 mm and a thickness of ∼1 mm. The microstructural analysis shows that the thin-walled tubes have partially elongated grains and a γ-fiber {111} texture. The precipitated nano-oxide particles in the thin-walled tubes are Y 4 Zr 3 O 12 and Y 2 (Zr 0.6 Ti 0.4) 2 O 7 , with an average size of 7.21 nm and a number density of 4.3 × 1023 m−3. The tubes have an ultimate tensile strength (UTS) of 908.3 MPa at ambient temperature and 186.2 MPa at 800 °C along the hoop direction. These values are comparable to those reported for ODS steel tubes produced by conventional methods, including powder hot extrusion, drilling machining, and Pilger-rolling. Based on the results, this near-net forming method effectively produces high-performance thin-walled ODS steel tubes. In addition, compared to conventional methods, the manufacturing process has a high material utilization rate of over 90%, which is a significant improvement. [ABSTRACT FROM AUTHOR]
- Subjects :
- *STEEL tubes
*FERRITIC steel
*TENSILE strength
*ISOSTATIC pressing
*MICROSTRUCTURE
Subjects
Details
- Language :
- English
- ISSN :
- 09215093
- Volume :
- 899
- Database :
- Academic Search Index
- Journal :
- Materials Science & Engineering: A
- Publication Type :
- Academic Journal
- Accession number :
- 176899741
- Full Text :
- https://doi.org/10.1016/j.msea.2024.146436