Creep deformation and rupture time evaluation for Ti43Al5V4Nb at 1033 K using the θ-projection method

ABSTRACT

In this study, the creep rupture time and creep properties of Ti43Al5V4Nb were evaluated at 1033 K (760°C), which was the designed maximum usage temperature for the material. A titanium–aluminium alloy with added V and Nb elements displayed higher elongation at a higher temperature than at lower temperatures. Almost all creep strain curves for Ti43Al5V4Nb consisted of tertiary stage creep. In this study, a numerical analysis method was adopted to investigate the creep properties. The creep strain curve was precisely determined using the θ-projection method when experimental data, until a life ratio of 0.9, were used to calculate the θ-parameters. The predicted creep rupture and creep strain occurrence times obtained using the θ-projection method showed good agreement with the experimental results.

KEYWORDS:

• Creep deformation
• creep life prediction
• Titanium-Aluminium alloys
• θ-projection method

Nomenclature

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Acknowledgments

This study was supported by JKA and its promotion funds from KEIRIN RACE in Japan. The Ti43Al5V4Nb plate was provided by IHI Corporation. The authors gratefully acknowledge the work of the past member, Mr. Takuya Ueda, an undergraduate student at the University of Fukui.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the JKA.