Microstructure evolution in cast Ti-37Al alloys with B additions
来源期刊：中国有色金属学报(英文版)2003年第z1期
论文作者：GAO Wen-li(高文理) ZHANG Hu(张 虎) ZHANG Er-lin (张二林) ZENG Shong-yan (曾松岩)
文章页码：124 - 127
Key words：TiB; TiB2; titanium alloy; solidification paths
Abstract: Ti-37Al-B alloys were produced by in-situ synthesis method. The phase constituent and the microstructure were studied by XRD and SEM. The results show that the borides in Ti-37Al-B alloys evolve from fibrous TiB to fibrous TiB+coarse TiB and eventually to fibrous TiB+coarse TiB+blocky TiB2 as the B content increases. The eutectic TiB is fibrous and the primary TiB is coarsely needlelike, but the TiB2 particles exhibit hexagonal prism morphology. The solidification paths also were analyzed.
GAO Wen-li(高文理)1, ZHANG Hu(张 虎)2, ZHANG Er-lin (张二林)1, ZENG Shong-yan (曾松岩)1
(1. School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China;
2. School of Materials Science and Engineering,
Beijing University of Aeronautics and Astronautics, Beijing 100083, China)
Abstract:Ti-37Al-B alloys were produced by in-situ synthesis method. The phase constituent and the microstructure were studied by XRD and SEM. The results show that the borides in Ti-37Al-B alloys evolve from fibrous TiB to fibrous TiB+coarse TiB and eventually to fibrous TiB+coarse TiB+blocky TiB2 as the B content increases. The eutectic TiB is fibrous and the primary TiB is coarsely needlelike, but the TiB2 particles exhibit hexagonal prism morphology. The solidification paths also were analyzed.
Key words:TiB; TiB2; titanium alloy; solidification paths
