순수 타이타늄 기반 산화물분산강화 합금의 미세조직및 기계적 특성
Microstructure and Mechanical Properties of Oxide Dispersion Strengthened alloy Based on Commercially Pure Titanium
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초록
This study is conducted as a preliminary research to verify the feasibility of Ti-based Oxide dispersion strengthened (ODS) alloy. Pure-Ti powder is mixed with Y2O3 powder and subsequently, mechanically alloyed at -150oC. The Ti-based ODS powder is hot-isostatically pressed and subsequently hot-rolled for recrystallization. The microstructure consists of elongated grains and Y excess fine particles. The oxide particle size is larger than that of the typical Febased ODS steel. Tensile test shows that the tensile ductility is approximately 25%, while the strength is significantly higher than that of pure Ti. The high-temperature hardness of the Ti-ODS alloy is also significantly higher than that of pure Ti at all temperatures, while being lower than that of Ti-6Al-4V. The dimple structure is well developed, and no evidence of cleavage fracture surface is observed in the fracture surface of the tensile specimen.
Abstract
This study is conducted as a preliminary research to verify the feasibility of Ti-based Oxide dispersion strengthened (ODS) alloy. Pure-Ti powder is mixed with Y2O3 powder and subsequently, mechanically alloyed at -150oC. The Ti-based ODS powder is hot-isostatically pressed and subsequently hot-rolled for recrystallization. The microstructure consists of elongated grains and Y excess fine particles. The oxide particle size is larger than that of the typical Febased ODS steel. Tensile test shows that the tensile ductility is approximately 25%, while the strength is significantly higher than that of pure Ti. The high-temperature hardness of the Ti-ODS alloy is also significantly higher than that of pure Ti at all temperatures, while being lower than that of Ti-6Al-4V. The dimple structure is well developed, and no evidence of cleavage fracture surface is observed in the fracture surface of the tensile specimen.
참고문헌 (7)
- Barton Mensah Arkhurst, "Evolution of Microstructure and Mechanical Properties of Oxide Dispersion Strengthened Steels Made from Water-Atomized Ferritic Powder", Metals and Materials International, 24(3), pp.464~480 (2018), 대한금속·재료학회[DOI]
- Barton Mensah Arkhurst, "Direct Laser Deposition of 14Cr Oxide Dispersion Strengthened Steel Powders Using Y2O3 and HfO2 Dispersoids", 대한금속·재료학회지, 55(8), pp.550~558 (2017), 대한금속·재료학회[DOI]
- 민동준, "Recent Advances in Understanding Physical Properties of Metallurgical Slags", Metals and Materials International, 23(1), pp.1~19 (2017), 대한금속·재료학회[DOI]
- J. Bok, , Acta Mater., 153, pp.71~ (2018)[DOI]
- 노상훈, "페라이트", 마르텐사이트계 산화물 분산강화 합금의 미세조직과 인장특성에 미치는 Cr, Mo, Al, Zr, Y2O3의 영향, 2014, pp.52(9), 705~711[DOI]
- 김영균, "Fe-14Cr계 페라이틱 산화물 분산 강화강의 고온 압축 및 크리프 특성에 미치는 열처리의 영향", 대한금속·재료학회지, 55(12), pp.862~869 (2017), 대한금속·재료학회[DOI]
- C. N. Elias, , Dent. Mater., 31, pp.1~ (2015)[DOI]