Effect of the temperature, strain rate and microstructure on flow and fracture characteristics of Ti-45Al-2Nb-2Mn+0.8vol.% TiB2 XD alloy

Erice Echávarri, Borja; Pérez Martín, Maria Jesus; Cendón Franco, David Angel y Galvez Diaz-Rubio, Francisco (2012). Effect of the temperature, strain rate and microstructure on flow and fracture characteristics of Ti-45Al-2Nb-2Mn+0.8vol.% TiB2 XD alloy. "The European Physical Journal Special Topics", v. 206 (n. 1); pp. 3-14. ISSN 1951-6355.

Descripción

Título: Effect of the temperature, strain rate and microstructure on flow and fracture characteristics of Ti-45Al-2Nb-2Mn+0.8vol.% TiB2 XD alloy
Autor/es:
  • Erice Echávarri, Borja
  • Pérez Martín, Maria Jesus
  • Cendón Franco, David Angel
  • Galvez Diaz-Rubio, Francisco
Tipo de Documento: Artículo
Título de Revista/Publicación: The European Physical Journal Special Topics
Fecha: Mayo 2012
Volumen: 206
Materias:
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ciencia de los Materiales
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

A series of quasi-static and dynamic tensile tests at varying temperatures were carried out to determine the mechanical behaviour of Ti-45Al-2Nb-2Mn+0.8vol.% TiB2 XD as-HIPed alloy. The temperature for the tests ranged from room temperature to 850  ∘C. The effect of the temperature on the ultimate tensile strength, as expected, was almost negligible within the selected temperature range. Nevertheless, the plastic flow suffered some softening because of the temperature. This alloy presents a relatively low ductility; thus, a low tensile strain to failure. The dynamic tests were performed in a Split Hopkinson Tension Bar, showing an increase of the ultimate tensile strength due to the strain rate hardening effect. Johnson-Cook constitutive relation was used to model the plastic flow. A post-testing microstructural of the specimens revealed an inhomogeneous structure, consisting of lamellar α2 + γ structure and γ phase equiaxed grains in the centre, and a fully lamellar structure on the rest. The assessment of the duplex-fully lamellar area ratio showed a clear relationship between the microstructure and the fracture behaviour.

Más información

ID de Registro: 19088
Identificador DC: http://oa.upm.es/19088/
Identificador OAI: oai:oa.upm.es:19088
URL Oficial: http://link.springer.com/article/10.1140%2Fepjst%2Fe2012-01581-7
Depositado por: Memoria Investigacion
Depositado el: 21 Oct 2013 08:01
Ultima Modificación: 21 Abr 2016 17:20
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