LIMARC; Ti5553alloy; Ti-6A1-4Valloy; Norton-Hoff model; Viscoplasticity; Anisotropy; FE simulations
Abstract :
[en] The elastoviscoplastic behavior of the Ti533 alloy is characterized and compared to the classical Ti-6A14V alloy. The true stress-strain curves are determined based on tensile tests performes under different strain rates at room temperature and at 150°C, from which the elastic constants and the parameters of a Norton-Hoff viscoplastic model are identified. The strength of the Ti5553 alloy is 20-40% higherthan the strength of the Ti-6A1-4V alloy. The Ti5553 alloy constitutes thus a promising candidate for advanced structural applications. In view of modeling structural applications of forming operations, the elastic and plastic initial anisotropy of the two alloys is investigated by combining compression on cylinders with elliptical sections, uniaxial tensile tests in different material directions , plane strain and shear tests. The initial anisotropy of the different alloys is very weak which justifies the modeling of the mechanical behavior with isotropic yield surface. The identified elastoviscoplastic model is validated by comparing experimental results with FE predictions both on cylindrical specimens subjected to tensile tests and on flat specimens subjected to plane strain conditions.
Disciplines :
Materials science & engineering
Author, co-author :
ben bettaieb, Mohamed
Van Hoof, Thibaut
Pardoen, thomas
dufour, Philippe
Lenain, Astrid
Pascal, Jean-Jacques
Habraken, Anne ; Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Language :
English
Title :
On the Elasto-viscoplastic behavior of the Ti5553 alloy
Publication date :
September 2014
Journal title :
Materials Science and Engineering: A: Structural Materials: Properties, Microstructures and Processing
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