Electron Beam Melting of a β-Solidifying Intermetallic Titanium Aluminide Alloy

被引：32
|
作者：
Wartbichler, Reinhold [1 ]
Clemens, Helmut [1 ]
Mayer, Svea [1 ]
机构：
[1] Univ Leoben, Dept Mat Sci, Franz Josef Str 18, A-8700 Leoben, Austria
来源：
ADVANCED ENGINEERING MATERIALS | 2019年 / 21卷 / 12期
关键词：
additive manufacturing; microstructures; phase diagrams; textures; titanium aluminides; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TEXTURE; DESIGN;
D O I：
10.1002/adem.201900800
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The structural features of an electron-beam-melted titanium aluminide alloy are presented. The microstructure consisting of gamma-TiAl, alpha(2)-Ti3Al, and beta(o)-TiAl reveals inhomogeneous phase and Al distributions, which are quantified by electron probe microanalysis. Electron backscatter diffraction is utilized to indicate a solidification via the beta-phase preferably along the < 001 > direction, resulting in a {001} beta(o) fiber texture parallel to the building direction. These findings are correlated to a calculated isopleth section of the Ti-Al-Nb-Mo system and the corresponding phase fraction diagram. The investigated beta-solidifying gamma-TiAl-based alloy, therefore, combines both the characteristics of electronbeam-melted Ti and TiAl alloys.
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页数：5
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