Determination of creep parameters of Ti-6Al-4V with bimodal and equiaxed microstructure

Tipo
Artigo de evento
Data de publicação
2012
Periódico
Defect and Diffusion Forum
Citações (Scopus)
9
Autores
Briguente L.A.N.S.
Couto A.A.
Guimaraes N.M.
Reis D.A.P.
Moura Neto C.
Barboza M.J.R.
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Resumo
Ti-6Al-4V is the most used of titanium alloy and presents some important properties as metallurgical stability, high specific strength, corrosion and creep resistance [1]. The aim of this study is to evaluate the creep behavior of Ti-6Al-4V alloy with equiaxed and bimodal microstructures and determine the creep parameters of Ti-6Al-4V in these conditions. It was used a Ti-6Al-4V alloy forged and annealed at 190°C for 6 hours and cooled in air. The material in this condition shows an equiaxed microstructure. For bimodal microstructure, the material was heat-treated at 950°C for 60 minutes and cooled in water until room temperature. After this the material was heat-treated at 600°C for 24 hours and cooled in air until room temperature. Creep tests were performed at 600°C in stress conditions of 125, 250 and 319 MPa at constant load. The alloy with Bimodal microstructure shows higher creep resistance with a longer life time in creep. © (2012) Trans Tech Publications.
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Assuntos Scopus
Bi-modal microstructures , Creep parameters , Equiaxed microstructures , High specific strength , Metallurgical stability , Stress condition , Ti-6 Al-4 V , Ti-6Al-4V alloy
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