Evolution of microstructures during cyclic and thermal stability of Ti-44Al-11Nb alloy

S. K. Varma; Erica Corral; Carlos Hernandez; R. Mahapatra; W. E. Frazier

Evolution of microstructures during cyclic and thermal stability of Ti-44Al-11Nb alloy

S. K. Varma, Erica Corral, Carlos Hernandez, R. Mahapatra, W. E. Frazier

Research output: Contribution to conference › Paper › peer-review

Abstract

A study has been conducted to determine the cyclic and static thermal stability of Ti-44Al-11Nb alloy in air in a range of temperature from 900 to 1000 °C. Weight gain method shows that the static oxidation rates are higher than cyclic oxidation rates under identical experimental conditions at a given temperature. The oxide layer at the surface penetrates the base metal in a direction parallel to the lamellae of the two phases, α₂ and γ, confirmed by scanning electron micrographs. The thermal stability of up to 168 hours indicates that there are phase transformations taking placed affecting the microstructures in such a way that large amount of dislocation activities are involved.

Original language	English
Pages	15-20
Number of pages	6
State	Published - 1998
Externally published	Yes
Event	Proceedings of the 1998 TMS Fall Meeting - Rosemont, IL, USA Duration: 11 Oct 1998 → 15 Oct 1998

Conference

Conference	Proceedings of the 1998 TMS Fall Meeting
City	Rosemont, IL, USA
Period	11/10/98 → 15/10/98

Cite this

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title = "Evolution of microstructures during cyclic and thermal stability of Ti-44Al-11Nb alloy",

abstract = "A study has been conducted to determine the cyclic and static thermal stability of Ti-44Al-11Nb alloy in air in a range of temperature from 900 to 1000 °C. Weight gain method shows that the static oxidation rates are higher than cyclic oxidation rates under identical experimental conditions at a given temperature. The oxide layer at the surface penetrates the base metal in a direction parallel to the lamellae of the two phases, α2 and γ, confirmed by scanning electron micrographs. The thermal stability of up to 168 hours indicates that there are phase transformations taking placed affecting the microstructures in such a way that large amount of dislocation activities are involved.",

author = "Varma, {S. K.} and Erica Corral and Carlos Hernandez and R. Mahapatra and Frazier, {W. E.}",

year = "1998",

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pages = "15--20",

note = "Proceedings of the 1998 TMS Fall Meeting ; Conference date: 11-10-1998 Through 15-10-1998",

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TY - CONF

T1 - Evolution of microstructures during cyclic and thermal stability of Ti-44Al-11Nb alloy

AU - Varma, S. K.

AU - Corral, Erica

AU - Hernandez, Carlos

AU - Mahapatra, R.

AU - Frazier, W. E.

PY - 1998

Y1 - 1998

N2 - A study has been conducted to determine the cyclic and static thermal stability of Ti-44Al-11Nb alloy in air in a range of temperature from 900 to 1000 °C. Weight gain method shows that the static oxidation rates are higher than cyclic oxidation rates under identical experimental conditions at a given temperature. The oxide layer at the surface penetrates the base metal in a direction parallel to the lamellae of the two phases, α2 and γ, confirmed by scanning electron micrographs. The thermal stability of up to 168 hours indicates that there are phase transformations taking placed affecting the microstructures in such a way that large amount of dislocation activities are involved.

AB - A study has been conducted to determine the cyclic and static thermal stability of Ti-44Al-11Nb alloy in air in a range of temperature from 900 to 1000 °C. Weight gain method shows that the static oxidation rates are higher than cyclic oxidation rates under identical experimental conditions at a given temperature. The oxide layer at the surface penetrates the base metal in a direction parallel to the lamellae of the two phases, α2 and γ, confirmed by scanning electron micrographs. The thermal stability of up to 168 hours indicates that there are phase transformations taking placed affecting the microstructures in such a way that large amount of dislocation activities are involved.

UR - http://www.scopus.com/inward/record.url?scp=0032298280&partnerID=8YFLogxK

M3 - Artículo

AN - SCOPUS:0032298280

SP - 15

EP - 20

T2 - Proceedings of the 1998 TMS Fall Meeting

Y2 - 11 October 1998 through 15 October 1998

ER -

Evolution of microstructures during cyclic and thermal stability of Ti-44Al-11Nb alloy

Abstract

Conference

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