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논문 기본 정보

자료유형
학술저널
저자정보
Nazmul Huda (University of Waterloo) Jae Won Kim (Korea Institute of Industrial Technology) Changwook Ji (Korea Institute of Industrial Technology) Dae-Geun Nam (Korea Institute of Industrial Technology) Yeong-Do Park (Dong-Eui University)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第39卷 第1號
발행연도
2021.2
수록면
81 - 88 (8page)

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초록· 키워드

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The optimal parameters for joining two different titanium alloys were determined by the Taguchi method and applied in similar and dissimilar joining of conventional Ti-6Al-4V and newly developed Ti-3Al-2.5V alloys. The microstructures of the two alloys and their mechanical properties were comparatively evaluated at the optimal parameters. The Ti-6Al-4V alloy showed a larger back bead width than that of Ti-3Al-2.5V under similar heat input, because of its lower thermal conductivity and higher specific heat capacity. The welded zone of Ti-3Al-2.5V contained a retained beta phase, which was absent in that of Ti-6Al-4V. This indicates that the transformation of the Ti-3Al-2.5V weld metal starts above the martensite temperature, while it starts below the martensite temperature for Ti-6Al-4V. The failure of the welded specimen occurred in the base metal for both the titanium alloys, which indicates the superior weld quality. However, the welded Ti-6Al-4V showed superior tensile strength to that of the Ti-3Al-2.5V weld under optimal conditions, owing the high beta phase fraction in its base metal. Meanwhile, it showed inferior ductility to that of Ti-3Al-2.5V because of its coarser beta phase.

목차

Abstract
1. Introduction
2. Design of experiment in taguchi method
3. Materials and method
4. Results and discussion
5. Conclusions
References

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