In the last decades, the class of Ti-rich TiAl-based intermetallic materials has replaced many contemporary alloys till 900 °C. Due to higher oxidation resistance, 20% lower density and higher (about 150 °C more) operating temperature possibility of Al-rich TiAl alloys over Ti-rich side, phases from the Al-rich region of this alloy system are considered to be highly potential candidates for high temperature structural applications. Although there are a lot of works about Ti-rich alloys, however, investigation from the Al-rich side is very limited. This work reviews the class of Al-rich TiAl alloys in terms of phases, microstructures, morphology, deformation mechanisms, mechanical behaviors along with a possible micromechanical modeling approach. Single crystal like Ti-61.8at.%Al alloy from the Al-rich family has been chosen as an example for modeling high temperature anisotropy and tension-compression asymmetry. A possible comparison with Ti-rich side is also presented.

中文翻译：

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回顾富铝Ti-Al合金的类别：模拟高温塑性各向异性和不对称性

在过去的几十年中，直到900°C时，富含Ti的TiAl基金属间化合物材料替代了许多现代合金。由于富Al侧的富Al TiAl合金具有更高的抗氧化性，更低的密度20％和更高的工作温度（大约高150°C），因此该合金系统的富Al区的相被认为是高度相变的。高温结构应用的潜在候选人。尽管有关富钛合金的工作很多，但是从富铝方面的研究非常有限。这项工作从相，微观结构，形态，变形机制，机械性能以及可能的微机械建模方法方面回顾了富铝TiAl合金的类别。单晶如Ti-61.8at。已选择来自富铝族的％Al合金作为建模高温各向异性和拉伸压缩不对称性的示例。还提出了与富钛面的可能比较。