This study employed a cross-rolling process to fabricate oxide dispersion strengthened (ODS) steel plates and investigated their microstructures and mechanical properties. The 9Cr-1W ODS ferritic steel was fabricated using mechanical alloying and hot isostatic pressing. The hot cross-rolling process produced thick ODS ferritic steel plates with a well-extended rectangular shape. The working direction greatly affected the grain structure and crystal texture of the ODS ferritic steel. Cross-rolled plates showed fine micro-grains with random crystal orientation, while unidirectionally rolled plates exhibited a strong orientation with larger, elongated grains. Transmission electron microscopy revealed a uniform distribution of nano-oxide particles in both rolling methods, with no major differences. Tensile tests of the ODS ferritic steel plates showed that the unidirectional rolled plates had anisotropic elongation, while cross-rolled plates exhibited isotropic behavior with uniform elongation. Cross-rolling produced finer, more uniform grains, reducing anisotropy and improving mechanical properties, making it ideal for manufacturing wide ODS steel components.

1. Introduction
2. Experimental Section
    2.1. Material fabrication
    2.2. Material characterization
3. Results and Discussion
    3.1. Microstructures of hot-rolled ODS steel plates
    3.2. Tensile property of hot-rolled ODS steel plates
4. Conclusion
Funding
Conflict of Interest
Data Availability Statement
Author Information and Contribution
Acknowledgments
ORCID
References

• Bu-An Kim(Department of Materials Science and Engineering, Pukyong National University, Busan, 48513, Republic of Korea)
• Sanghoon Noh(Department of Materials Science and Engineering, Pukyong National University, Busan, 48513, Republic of Korea) Corresponding author