Micromechanics of Ti-10V-2Fe-3Al: In situ synchrotron characterisation and modelling

S.L. Raghunathan, A.M. Stapleton, R.J. Dashwood, M. Jackson, D. Dye

Research output: Contribution to journalArticle

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Abstract

The lattice strain evolution in near-β Ti–10V–2Fe–3Al during room temperature tensile loading has been characterised in the as-forged and forged and aged conditions using in situ synchrotron X-ray diffraction. As expected, the fine scale α which precipitates during aging strengthens the β-phase much more effectively than the α present in the forged sample. The behaviour has been modelled using a two-phase elastic–plastic self-consistent (EPSC) model. It is found that the constrained β-phase E200 increases from 45 GPa in the as-forged condition to 88 GPa in the forged and aged material. C11–C12 increases from 12 to 47 GPa due to the increase in β-stabiliser content, in agreement with atomistic predictions. The EPSC models are reasonably successful at reproducing the observed behaviour, but do not provide a complete description of the micromechanics of these materials.
Original languageEnglish
Pages (from-to)6861-6872
Number of pages12
JournalActa Materialia
Volume55
Issue number20
DOIs
Publication statusPublished - 2007

Fingerprint

Micromechanics
Synchrotrons
Precipitates
Aging of materials
X ray diffraction
Temperature

Keywords

  • Titanium alloys
  • X-ray diffraction
  • Plastic deformation
  • Lattice strains
  • Micromechanical modelling

Cite this

Micromechanics of Ti-10V-2Fe-3Al: In situ synchrotron characterisation and modelling. / Raghunathan, S.L.; Stapleton, A.M.; Dashwood, R.J.; Jackson, M.; Dye, D.

In: Acta Materialia, Vol. 55, No. 20, 2007, p. 6861-6872.

Research output: Contribution to journalArticle

Raghunathan, S.L. ; Stapleton, A.M. ; Dashwood, R.J. ; Jackson, M. ; Dye, D. / Micromechanics of Ti-10V-2Fe-3Al: In situ synchrotron characterisation and modelling. In: Acta Materialia. 2007 ; Vol. 55, No. 20. pp. 6861-6872.
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AB - The lattice strain evolution in near-β Ti–10V–2Fe–3Al during room temperature tensile loading has been characterised in the as-forged and forged and aged conditions using in situ synchrotron X-ray diffraction. As expected, the fine scale α which precipitates during aging strengthens the β-phase much more effectively than the α present in the forged sample. The behaviour has been modelled using a two-phase elastic–plastic self-consistent (EPSC) model. It is found that the constrained β-phase E200 increases from 45 GPa in the as-forged condition to 88 GPa in the forged and aged material. C11–C12 increases from 12 to 47 GPa due to the increase in β-stabiliser content, in agreement with atomistic predictions. The EPSC models are reasonably successful at reproducing the observed behaviour, but do not provide a complete description of the micromechanics of these materials.

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