Effect of Stress Level on the High Temperature Deformation and Fracture Mechanisms of Ti-45Al-2Nb-2Mn-0.8 vol. pct TiB2: An In Situ Experimental Study

Muñoz Moreno, Rocío and Pérez Prado, María Teresa and Llorca Martinez, Francisco Javier and Ruiz Navas, Elisa María and Boehlert, Carl (2013). Effect of Stress Level on the High Temperature Deformation and Fracture Mechanisms of Ti-45Al-2Nb-2Mn-0.8 vol. pct TiB2: An In Situ Experimental Study. "Metallurgical and materials transactions. A, Physical metallurgy and materials science", v. 44 (n. 4); pp. 1887-1896. ISSN 1073-5623. https://doi.org/10.1007/s11661-012-1515-8.

Description

Title: Effect of Stress Level on the High Temperature Deformation and Fracture Mechanisms of Ti-45Al-2Nb-2Mn-0.8 vol. pct TiB2: An In Situ Experimental Study
Author/s:
  • Muñoz Moreno, Rocío
  • Pérez Prado, María Teresa
  • Llorca Martinez, Francisco Javier
  • Ruiz Navas, Elisa María
  • Boehlert, Carl
Item Type: Article
Título de Revista/Publicación: Metallurgical and materials transactions. A, Physical metallurgy and materials science
Date: April 2013
ISSN: 1073-5623
Volume: 44
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

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (1MB)

Abstract

The effect of the applied stress on the deformation and crack nucleation and propagation mechanisms of a c-TiAl intermetallic alloy (Ti-45Al-2Nb-2Mn (at. pct)-0.8 vol. pct TiB2) was examined by means of in situ tensile (constant strain rate) and tensile-creep (constant load) experiments performed at 973 K (700 �C) using a scanning electron microscope. Colony boundary cracking developed during the secondary stage in creep tests at 300 and 400 MPa and during the tertiary stage of the creep tests performed at higher stresses. Colony boundary cracking was also observed in the constant strain rate tensile test. Interlamellar ledges were only found during the tensile-creep tests at high stresses (r>400 MPa) and during the constant strain rate tensile test. Quantitative measurements of the nature of the crack propagation path along secondary cracks and along the primary crack indicated that colony boundaries were preferential sites for crack propagation under all the conditions investigated. The frequency of interlamellar cracking increased with stress, but this fracture mechanism was always of secondary importance. Translamellar cracking was only observed along the primary crack.

More information

Item ID: 29082
DC Identifier: http://oa.upm.es/29082/
OAI Identifier: oai:oa.upm.es:29082
DOI: 10.1007/s11661-012-1515-8
Official URL: http://link.springer.com/article/10.1007%2Fs11661-012-1515-8
Deposited by: Memoria Investigacion
Deposited on: 30 Jun 2014 10:50
Last Modified: 22 Sep 2014 11:44
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM