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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 2    No. 1    February 1992

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PLASTIC DEFORMATION OF TiAI INTERMETALLICS WITH Mn ADDITION
Huang Baiyun,  Qu, Xuanhui ,  Wen Jinhai,  Lei Changming

Central South University of Technology, Changsha 410083, China

Abstract:The dislocation structures of arc-melted, near-equiatomic TiAI alloys containing 1.5-2.0 wt.一%manganese were analysed and compared with those of binary TiAI alloy processed in a similar fashion. It was found that the pinning effect of a / 6 [ 112] partial dislocations was eliminated by Mn addition, as a result, the movement of a[101] and a/ 2[112] superdislocations and twinning and played an important role in the plastic deformation and increased the ductility of TiAI alloys. In addition, the workability of the Mn-ductilized TiAI alloy was evaluated with hot extrusion and forging.

 

Key words: TiAI alloys, Plastic deformation, dislocation structure

ISSN 1672-7029
CN 43-1423/U

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