Tensile Properties of a Cast TiAl Alloy with Directional Lamellar Microstructures

Sheng Li; Chun Lei Zhu; Rui Cao; Ji Zhang

doi:10.4028/www.scientific.net/AMR.652-654.1063

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654Tensile Properties of a Cast TiAl Alloy with...

Tensile Properties of a Cast TiAl Alloy with Directional Lamellar Microstructures

Abstract:

A cast TiAl alloy with directional γ-TiAl/α2-Ti3Al lamellar microstructure showed excellent strength retention at high temperatures and distinguished ambient ductility level as well. But both the ductility and strength at room temperature exhibited somewhat undulation. According to the microstructure and fracture surface observations, the negative diversification of the test results is attributed to the presence of mis-oriented lamellar colonies. The tilted lamellar colonies larger than a critical value can trigger the tensile fractures and therefore diminish the tensile strength and ductility significantly.

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

1063-1066

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.1063

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Online since:

January 2013

Authors:

Sheng Li, Chun Lei Zhu, Rui Cao, Ji Zhang

Keywords:

Cast Tial Alloy, Fracture Surface, Tensile Properties

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