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 and Pérez Martín, Maria Jesus and Cendón Franco, David Ángel and Gálvez Díaz-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.

Description

Title: Effect of the temperature, strain rate and microstructure on flow and fracture characteristics of Ti-45Al-2Nb-2Mn+0.8vol.% TiB2 XD alloy
Author/s:
  • Erice Echávarri, Borja
  • Pérez Martín, Maria Jesus
  • Cendón Franco, David Ángel
  • Gálvez Díaz-Rubio, Francisco
Item Type: Article
Título de Revista/Publicación: The European Physical Journal Special Topics
Date: May 2012
ISSN: 1951-6355
Volume: 206
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 19088
DC Identifier: http://oa.upm.es/19088/
OAI Identifier: oai:oa.upm.es:19088
Official URL: http://link.springer.com/article/10.1140%2Fepjst%2Fe2012-01581-7
Deposited by: Memoria Investigacion
Deposited on: 21 Oct 2013 08:01
Last Modified: 24 Sep 2018 10:57
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