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A Preliminary Research on the Mechanical Properties of TiAl+Ti5Si3 Dual Phase Alloys

Published online by Cambridge University Press:  22 February 2011

Lanting Zhang
Affiliation:
Department of Materials Science, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
Guohua Qiu
Affiliation:
Department of Materials Science, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
Jiansheng Wu
Affiliation:
Department of Materials Science, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
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Abstract

A sufficient Si addition to TiAl matrix has led to TiAl + Ti5Si3 dual phase alloys, showing coupled-growth microstructure. Compression tests at R.T. as well as high temperatures indicated that the yield stress increased with increasing Ti5Si3 volume fraction, and decreased at higher temperature. The reinforcement from Ti5Si3 phase was obvious, while high Si and Al contents resulted in low ductility. The fracture surfaces were quasi-cleavage. Further research should concern with the adjustment of the shape and amount of the second phase.

Type
Research Article
Copyright
Copyright © Materials Research Society 1995

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References

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