열처리에 따른 Ti-6Al-4V 합금의 전기화학적 부식거동 = The Effects of Heat Treatments on the Electrochemical Corrosion Behavior for Ti-6Al-4V Alloy

다국어 초록 (Multilingual Abstract)

In this paper the effect of aging heat treatment to the hardness and electro-chemical corrosion behavior of the Ti-6Al-4V alloy was studied. Its solution heat treatments were carried out 966'C 1066'C and its aging heat treatments was carried out 5hours on the temperature at 550℃, 600℃ and 650℃ with different time of 1hour, 2hours, 4hours, 8hours and 16hours respectively.
The Electrochemical corrosion behavior by potentio dynamic polarization in 1N HNO₃+ 15ppm HF solution was accomplished.
The obtained results were as follows;
1. As solution heat temperature increased, the corrosion potential was increased. whereas passive current density and critical current density were decreased.
2. As aging heat temperature increased, the corrosion potential were almost constant but passive current density was decreased.
3. As solution heat temperature increased, the hardness was increased from Hv 405 at 966℃ to Hv 512 at 1066℃, whereas the highest hardness time was reduced from 4hours to 2hours.

목차 (Table of Contents)

• 1. 서론
• 2. 실험 방법
• 2.1 실험 시편 및 열처리
• 2.2 전기화학적 부식 시험
• 2.3 분극후 시편표면의 성분분석
• 2.4 경도시험
• 3. 실험 결과 및 고찰
• 3.1 전기화학적 분극측정 결과
• 3.2. 분극후 표면 성분 분석
• 3.3 미소경도 시험결과
• 4. 결론
• 참고문헌