복합 밀링 공정에 따른 철계 산화물분산강화 합금의 미세조직 및 기계적 특성 변화 연구

• Published in: 대한금속·재료학회지, 54(3) Vol. 54; no. 3; pp. 171 - 179
• Main Authors: 설재복, Jae-bok Seol, 김경민, Kyong Min Kim, 김정한, Jeoung Han Kim
• Format: Journal Article
• Language: Korean
• Published: 대한금속재료학회 05.03.2016; 대한금속·재료학회
• Subjects: cryomilling; mechanical alloying; oxide dispersion strengthened; oxide particles; 재료공학
• ISSN: 1738-8228; 2288-8241
• DOI: 10.3365/KJMM.2016.54.3.171

A novel approach is established to produce oxide dispersion-strengthened steels with a fine distribution of oxide nanoparticles. This approach involves cryo-milling followed by ball-milling at room temperature. This complementary milling technique allows such steels to exhibit a remarkable combination of strength and ductility. Based on our experimental findings, the associated microstructural factor contributing to the strength is likely to be Y-Ti-O complex oxide particles. On the other hand, an additional milling process performed at room temperature is not effective with regard to deformationinduced sintering. Therefore, it is concluded that milling at room temperature after cryo-milling does not improve the tensile ductility of oxide dispersion-strengthened steels.