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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