Ti-xMo-2Fe 베타계 타이타늄 합금의 기계적 특성 및 부식 특성에 미치는 Mo의 영향 평가 = Effect of Molybdenum on the Mechanical and Corrosion Properties of Ti-xMo-2Fe Beta Alloys

다국어 초록 (Multilingual Abstract)

Titanium alloys are currently used in offshore industries. The titanium alloys used in offshoreplants need to have excellent corrosion resistance and mechanical properties because offshore plants areexposed to harsh corrosive environments. At this time, the Ti-6Al-4V ELI alloy is mainly used in offshoreplants because it has excellent mechanical properties and corrosion resistance. However, Ti-6Al-4V ELI alloyhas the disadvantage of poor formability. To improve this, studies on metastable beta-Titanium alloys witha BCC structure are being actively conducted. In this study, a metastable beta-titanium alloy was fabricatedusing Mo, which is inexpensive and improves corrosion resistance, and Fe, which improves strength, amongthe titanium beta stabilizer elements. After the Ti-6Al-4V ELI and Ti-xMo-2Fe alloys solution treatments,electrochemical corrosion experiments were conducted to analyze corrosion characteristics, and mechanicalproperties were also analyzed through compression tests at room temperature and Vickers hardnessmeasurement. Corrosion properties and the mechanical properties of Ti-xMo-2Fe alloy were considered inconnect experiments such as microstructure analysis and hardness measurement. It was confirmed that thecorrosion resistance of the Ti-xMo-2Fe alloy was better than that of the Ti-6Al-4V ELI alloy, and it wasconfirmed that the compressive strength and elongation rate of Ti-xMo-2Fe with its BCC structure get higherthan Ti-6Al-4V ELI alloy.