Microstructure and mechanical properties of gamma TiAl based alloys produced by combustion synthesis plus compaction route

被引：20

作者：

Agote, I. ^{[1
]}

Coleto, J. ^{[1
]}

Gutierrez, M. ^{[1
]}

Sargsyan, A. ^{[1
]}

de Cortazar, M. Garcia ^{[1
]}

Lagos, M. A. ^{[1
]}

Borovinskaya, I. P. ^{[2
]}

Sytschev, A. E. ^{[2
]}

Kvanin, V. L. ^{[2
]}

Balikhina, N. T. ^{[2
]}

Vadchenko, S. G. ^{[2
]}

Lucas, K. ^{[3
]}

Wisbey, A. ^{[3
]}

Pambaguian, L. ^{[4
]}

机构：

[1] INASMET TECNALIA, Paseo Mikeletegi, E-20009 San Sebastian, Spain

[2] Russian Acad Sci ISMAN, Inst Struct Macrokinet & Mat Sci, Chernogolovka 142432, Moscow Region, Russia

[3] QINETIQ, Farnborough, Hants, England

[4] European Space Agcy, Estec, Mat Mech & Processes Sect, NL-2200 AG Noordwijk, Netherlands

来源：

INTERMETALLICS | 2008年 / 16卷 / 11-12期

关键词：

titanium aluminides; based on TiAl; reaction synthesis; intermetallics; miscellaneous; mechanical properties at high temperatures; aerospace constructional uses;

D O I：

10.1016/j.intermet.2008.08.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Microstructure and mechanical properties of gamma-TiAl alloy with the chemical composition Ti-48Al-2Cr-2Nb (at.%) have been investigated. The alloy was prepared in one step using a combustion synthesis + compaction process, where the synthesis and the shaping take place at the same time. Two different combustion routes were used: forced self-propagating high-temperature synthesis + compaction (FSHS + C) and thermal explosion + compaction (TE + C). Fully lamellar microstructure was obtained in both processing routes after the appropriate homogenisation thermal treatment. Nevertheless, TE + C route showed coarser lamellar colonies. A remarkable oxygen content reduction was achieved in samples synthesised by FSHS + C route. Tensile properties (especially UTS) were found to be in the same range as other alloys obtained by conventional processing routes, however, low ductility was achieved. Good creep and fatigue properties were obtained. All fracture surfaces showed a brittle fracture mechanism. Finally, it was found out that the studied processing routes showed promising results as an alternative manufacturing technology for gamma-TiAl based alloys. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1310 / 1316

页数：7

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