Effect of Oxygen Content on Microstructure and Tensile Properties of a 22Cr-5Al ODS Steel
| Autor: | Yazhong Zhai, Rui Cao, Yingjie Yan, Wei Qin, Yukun Zhang, Tiejun Wang, Hongyan Che |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science Alloy Oxide chemistry.chemical_element 02 engineering and technology engineering.material 01 natural sciences Oxygen Article chemistry.chemical_compound Hot isostatic pressing 0103 physical sciences Ultimate tensile strength 22Cr-5Al ODS steel General Materials Science Y-rich precipitates 010302 applied physics tensile properties Microscopy QC120-168.85 oxygen content Metallurgy QH201-278.5 technology industry and agriculture 021001 nanoscience & nanotechnology Microstructure Engineering (General). Civil engineering (General) Intergranular fracture TK1-9971 chemistry Descriptive and experimental mechanics engineering Grain boundary Electrical engineering. Electronics. Nuclear engineering TA1-2040 0210 nano-technology |
| Zdroj: | Materials, Vol 14, Iss 2241, p 2241 (2021) Materials Volume 14 Issue 9 |
| ISSN: | 1996-1944 |
| Popis: | The high tensile strength and irradiation resistance of oxide dispersion strengthened (ODS) ferritic steels is attributed to the ultrafine and dispersed oxides within the matrix. The high content of oxygen and yttrium is critical for the formation of dense Y-rich oxides. However, only few studies have reported the effect of oxygen content on the microstructure and mechanical properties of ODS steels. Herein, we employed gas atomization reactive synthesis to prepare pre-alloy powders and then hot isostatic pressing (HIP) to consolidate two 22Cr-5Al ODS steels with different oxygen content. Our results showed Y-rich precipitates at and near grain boundaries of the as-HIPed alloys. Moreover, with the oxygen content increasing from 0.04 to 0.16 wt%, more precipitates precipitated in the as-HIPed alloy, and the ultimate tensile strength of the alloy was improved. However, increasing the oxygen content to 0.16 wt% led to formation of stripe and chain precipitates at and near grain boundaries, which caused a partial intergranular fracture of the as-HIPed alloy. |
| Databáze: | OpenAIRE |
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