논문 해외 국제전문학술지(SCI급) Collapse of lamellar structure and stability with the addition of Misch metal (Mm) to the cast Ti–Al–Mo–Nb–(Mm) alloys
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2018-05
- 저자명 Kwangsu Choi, Minseok Kim, Jun Zhu, Fan Zhang, Youngbuem Song, Seonghoon Yi & Joon Sik Park
- 학술지명 Journal of Materials Science
- 발행처명 Springer
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 7
홈페이지
논문 초록 (Abstract)
Misch metal (Mm), consisting of Ce and La, was added to Ti–45Al–3Mo–2Nb alloys in order to investigate phase transformation and microstructural changes. The pseudo-binary phase diagram was estimated via PANDAT software™. The addition of Mm caused a decrease in both the fractions of α2/γ lamella and the β0 phase, and served as an important factor for a collapse of lamellar structures. In addition, Mm significantly decreased the colony size of the alloy, resulting in an increase in high-temperature tensile yield strength of ~ 40% for the alloys with 0.3 at% Mm at 800 °C. It appears that the addition of Mm affects the phase stability and increase the proportion of the γ phase. The microstructural changes, with respect to Mm additions, were discussed in terms of structural observations during isothermal heat treatments.