Title of article
Effects of Sc addition on the microstructure and tensile properties of Ti–6.6Al–5.5Sn–1.8Zr alloy
Author/Authors
W.L. Xiao، نويسنده , , S.Q. Wu، نويسنده , , D.H. Ping، نويسنده , , H. Murakami، نويسنده , , Y. Yamabe-Mitarai، نويسنده ,
Issue Information
دوهفته نامه با شماره پیاپی سال 2012
Pages
7
From page
1015
To page
1021
Abstract
The effects of Sc additions on the microstructure and tensile properties of Ti–6.6Al–5.5Sn–1.8Zr-based alloys have been investigated. The results indicated that Sc acts as α-stabilizer in the studied alloy system. The grain sizes of as-cast and forged alloys were refined significantly by Sc additions. With increasing Sc addition, a large number of Sc5Sn3 and oxides are formed. The formation of brittle α2-Ti3Al precipitates during long-term aging treatment is suppressed by high content of Sc addition. The Sc addition increases the solid solution strengthening; meanwhile, the formation of Sc5Sn3 and oxides plays a role in grain refinement and dispersion strengthening. Therefore, it has been found that both room temperature and high temperature strengths are gradually improved, whereas the ductility is decreased with increasing Sc addition.
Keywords
Mechanical properties , Microstructure , Alloys , Heat treatment
Journal title
Materials Chemistry and Physics
Serial Year
2012
Journal title
Materials Chemistry and Physics
Record number
1064990
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