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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Microstructure of a two-phase titanium alloy by
rapid solidification technique
LIU Xing-xing(刘星星)1, 2, LONG Ling(龙  玲)1, 2, YAN Biao(严  彪)1, 2,
TANG Ren-jian(唐人剑)1, 2, ZOU Hong-liu(邹洪流)1, 2

1. Shanghai Key Labortory of D&A for Metal-Functional Materials, Shanghai 200092, China;
2. School of Materials Science and Engineering, Tongji University, Shanghai 200092, China

Abstract:Ribbons of the two-phase titanium alloy were fabricated by single-roller rapid solidification technique, and aged at high temperature. The microstructure of ribbon samples were characterized with X-ray diffractometer (XRD) and environmental scanning electron microscope (ESEM). The microstructures of the alloy are composed of α phase and supersaturated β phase, and X-ray diffraction results show that all peaks of the α and β phases shift slightly to smaller angles, which can be explained by the disordering growth pattern caused by the rapid solidification process. After aging at 960 ℃ in vacuum, the ribbon is composed of homogeneous α phase and β phase.

 

Key words: single-roller rapid solidification; two-phase titanium alloy; aging

ISSN 1672-7029
CN 43-1423/U

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