Abstract
Ti-4.5Al-2.5Cr-1.2Fe-0.1C referred to as KS Ti-531C is a newly developed low cost titanium alloy for use in next-generation aircrafts by adding inexpensive elements such as C, Fe, Al and Cr. There is a possibility for the formation of TiCr and/or TiCr2 after a long heat treatment or welding. Therefore, relationships between the microstructures and fatigue properties of KS Ti-531C subjected to several heat treatments as well as laser welding were investigated systematically. The results showed that the fatigue strength of laser-welded KS Ti-53IC was lower than that of non-laser welded KS Ti-531C.
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Niinomi, M., Nakai, M., Hieda, J., Cho, K., Itsumi, Y., Murakami, S., … Abe, W. (2014). Fatigue characteristics and microstructures of laserand non-laser welded low-cost Ti-4.5Al-2.5Cr-1.2Fe-0.1C for use in next generation aircrafts. In TMS Annual Meeting (pp. 49–56). Minerals, Metals and Materials Society. https://doi.org/10.1007/978-3-319-48237-8_7
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