Microstructure, tensile, and creep behavior of Ti-15Al-33Nb (at%) and Ti-21Al-29Nb (at%) orthorhombic+BCC alloys

C. J. Cowen, C. J. Boehlert

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work the creep and elevated temperature tensile behavior of two orthorhombic (O)+body-centered-cubic (BCC) alloys, specifically Ti-15Al-33Nb(at%) and Ti-21Al-29Nb (at%), were evaluated in order to determine the effect of alloy composition and microstructure on the mechanical properties and deformation behavior. Tensile tests, performed at RT and 650°C, indicated that the Ti-21Al-29Nb alloy exhibited significantly lower elongation-to-failure values than the Ti-15Al-33Nb alloy. Heat-treatments used to precipitate greater volume fractions of the O-phase resulted in greater strength levels, while the BCC phase provided ductility. The measured creep stress exponents (1.1

LanguageEnglish (US)
Title of host publicationTMS Annual Meeting
Pages93-103
Number of pages11
Volume2006
StatePublished - 2006
Event135th TMS Annual Meeting, 2006 - San Antonio, TX, United States
Duration: Mar 12 2006Mar 16 2006

Other

Other135th TMS Annual Meeting, 2006
CountryUnited States
CitySan Antonio, TX
Period3/12/063/16/06

Profile

creep
microstructure
Creep
Microstructure
ductility
Ductility
Precipitates
Elongation
mechanical property
Volume fraction
Heat treatment
Mechanical properties
Chemical analysis
temperature
Temperature

Keywords

  • Creep
  • Microstructure
  • Tension
  • Titanium alloys

ASJC Scopus subject areas

  • Geology
  • Metals and Alloys

Cite this

Microstructure, tensile, and creep behavior of Ti-15Al-33Nb (at%) and Ti-21Al-29Nb (at%) orthorhombic+BCC alloys. / Cowen, C. J.; Boehlert, C. J.

TMS Annual Meeting. Vol. 2006 2006. p. 93-103.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Cowen, CJ & Boehlert, CJ 2006, Microstructure, tensile, and creep behavior of Ti-15Al-33Nb (at%) and Ti-21Al-29Nb (at%) orthorhombic+BCC alloys. in TMS Annual Meeting. vol. 2006, pp. 93-103, 135th TMS Annual Meeting, 2006, San Antonio, TX, United States, 3/12/06.
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AB - In this work the creep and elevated temperature tensile behavior of two orthorhombic (O)+body-centered-cubic (BCC) alloys, specifically Ti-15Al-33Nb(at%) and Ti-21Al-29Nb (at%), were evaluated in order to determine the effect of alloy composition and microstructure on the mechanical properties and deformation behavior. Tensile tests, performed at RT and 650°C, indicated that the Ti-21Al-29Nb alloy exhibited significantly lower elongation-to-failure values than the Ti-15Al-33Nb alloy. Heat-treatments used to precipitate greater volume fractions of the O-phase resulted in greater strength levels, while the BCC phase provided ductility. The measured creep stress exponents (1.1

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