Idioma:

Microstructure evolution and mechanical behavior of ultrafine Ti 6Al 4V during low-temperature superplastic deformation

Zherebtsov, S.V. ; Kudryavtsev, E.A. ; Salishchev, G.A. ; Straumal, B.B. ; Semiatin, S.L.

Acta materialia, 2016-12, Vol.121, p.152-163 [Periódico revisado por pares]

Texto completo disponível

Citações Citado por

Título:
Microstructure evolution and mechanical behavior of ultrafine Ti 6Al 4V during low-temperature superplastic deformation
Autor: Zherebtsov, S.V. ; Kudryavtsev, E.A. ; Salishchev, G.A. ; Straumal, B.B. ; Semiatin, S.L.
Assuntos: Coarsening ; Dynamics ; Evolution ; Microstructure ; Plastic deformation ; Superplastic deformation ; Superplastic forming ; Tensile tests ; Titanium base alloys
É parte de: Acta materialia, 2016-12, Vol.121, p.152-163
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: The influence of microstructure evolution on the low-temperature superplasticity of ultrafine Ti--6Al--4V was established. For this purpose, the static and dynamic coarsening response and plastic-flow behavior of the alloy with a mean size of alpha (sub)grains and beta particles of 0.1-0.4 mu m were determined via a series of tension tests at temperatures between 450 and 700 degree C. Both static and dynamic coarsening exhibited diffusion-controlled (r 3-vs-time) kinetics. However, dynamic coarsening was approximately two orders of magnitude faster than the corresponding static behaviors due to enhanced diffusion through the deformed beta matrix. A total elongation of 1000% and strain-rate-sensitivity exponent m = 0.48 were obtained at 550 degree C and 2 10-4 s-1. Very limited cavitation was observed in the specimens after superplastic deformation under optimal conditions.
Idioma: Inglês

Voltar para lista de resultados