Reviewing the class of Al-rich Ti-Al alloys: modeling high temperature plastic anisotropy and asymmetry

  • Chowdhury H
  • Altenbach H
  • Krüger M
  • et al.
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Abstract

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.

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Chowdhury, H., Altenbach, H., Krüger, M., & Naumenko, K. (2017). Reviewing the class of Al-rich Ti-Al alloys: modeling high temperature plastic anisotropy and asymmetry. Mechanics of Advanced Materials and Modern Processes, 3(1). https://doi.org/10.1186/s40759-017-0031-3

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