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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 4    No. 3    September 1994

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EFFECT OF Sb ADDITION ON MICROSTRUCTURE AND MECHANICAL PROPERTIESOF TiAI INTERMETALLIC COMPOUND
He Yuehui ;Qu Xuanhui ;Huang Baiyun ;Lei Changming; Liu Yexiang

Pouoder Metallurgical Research Institute ; Central South University of Technology ; Changsha 410083

Abstract:The effect of Sb addition on the microstructures and room-temperature mechanical properties of Ti-34 wt.-% Al alloy was investigated. The experimental results showed that the microstructure of Ti-34 wt.-% Al alloy changed from as-cast coarse columnar into narrow columnar grains due to Sb addition , and that the room temperature bending strength and ductility of TiAl+Sb alloy were relatively high compared with those of the binary alloy. Fractograph analysis exhibited that the crack could propagate in single Y phase and there were more tear ridges in TiAl+Sb alloys.

 

Key words: Sb micrcotructure TiAl intermetallic compound

ISSN 1672-7029
CN 43-1423/U

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