Electron Beam Melting of a β‐Solidifying Intermetallic Titanium Aluminide Alloy,Advanced Engineering Materials

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Electron Beam Melting of a β‐Solidifying Intermetallic Titanium Aluminide Alloy
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2019-10-29 , DOI: 10.1002/adem.201900800
Reinhold Wartbichler ₁ , Helmut Clemens ₁ , Svea Mayer ₁

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The structural features of an electron‐beam‐melted titanium aluminide alloy are presented. The microstructure consisting of γ‐TiAl, α₂‐Ti₃Al, and β_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 β‐phase preferably along the <001> direction, resulting in a {001}_βo 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 β‐solidifying γ‐TiAl‐based alloy, therefore, combines both the characteristics of electron‐beam‐melted Ti and TiAl alloys.

中文翻译：

β溶化金属间铝化钛合金的电子束熔化

介绍了电子束熔化的铝化钛合金的结构特征。由γ-TiAl合金的显微组织，α ₂ -Ti ₃ Al和β _ö -TiAl揭示了不均匀的相和Al分布，这是由电子探针显微分析定量。电子反向散射衍射用于指示沿β相的凝固，最好沿<001>方向凝固，从而产生平行于构造方向的{001} _βo纤维织_构。这些发现与Ti-Al-Nb-Mo系统的等值截面和相应的相分数图相关。因此，所研究的基于β凝固的γ-TiAl基合金兼具电子束熔化的Ti和TiAl合金的特性。

更新日期：2019-10-29

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