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The effect of cooling rates on the microstructure and mechanical properties of thermo-mechanically processed Ti-Al-Mo-V-Cr-Fe alloys

Journal Article


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Abstract


  • Two near-β titanium alloys, Ti–5Al–5Mo–5V–1Cr–1Fe and a modified one containing 2 wt% Cr (Ti–5Al–5Mo–5V–2Cr–1Fe) were produced from Ti hydride precursor powders via the cost-effective blended elemental powder metallurgy technique. The effects of two cooling rates (10 K s−1 and 1 K s−1) during thermo-mechanical processing on the microstructure and mechanical properties were investigated using X-ray diffraction and scanning electron microscopy. X-ray line profile analysis revealed that dislocation densities and microstrain in β-Ti phase are higher than in α-Ti phase for all cases. In both alloys, slower cooling results in an increase in α volume fraction and promotes morphology of continuous grain boundary α phase. A lower total elongation is obtained in both alloys under slower cooling which could be accounted for by the continuous morphology of α phase. Overall, Ti–5Al–5Mo–5V–1Cr–1Fe displays higher ultimate tensile strength and total elongation compared to Ti–5Al–5Mo–5V–2Cr–1Fe, regardless of the cooling rate.

UOW Authors


  •   Ahmed, Mansur (external author)
  •   Savvakin, Dmytro G. (external author)
  •   Ivasishin, Orest M. (external author)
  •   Pereloma, Elena

Publication Date


  • 2013

Citation


  • Ahmed, M., Savvakin, D. G., Ivasishin, O. M. & Pereloma, E. V. (2013). The effect of cooling rates on the microstructure and mechanical properties of thermo-mechanically processed Ti-Al-Mo-V-Cr-Fe alloys. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 576 167-177.

Scopus Eid


  • 2-s2.0-84877012071

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2168&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1159

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 167

End Page


  • 177

Volume


  • 576

Place Of Publication


  • Switzerland

Abstract


  • Two near-β titanium alloys, Ti–5Al–5Mo–5V–1Cr–1Fe and a modified one containing 2 wt% Cr (Ti–5Al–5Mo–5V–2Cr–1Fe) were produced from Ti hydride precursor powders via the cost-effective blended elemental powder metallurgy technique. The effects of two cooling rates (10 K s−1 and 1 K s−1) during thermo-mechanical processing on the microstructure and mechanical properties were investigated using X-ray diffraction and scanning electron microscopy. X-ray line profile analysis revealed that dislocation densities and microstrain in β-Ti phase are higher than in α-Ti phase for all cases. In both alloys, slower cooling results in an increase in α volume fraction and promotes morphology of continuous grain boundary α phase. A lower total elongation is obtained in both alloys under slower cooling which could be accounted for by the continuous morphology of α phase. Overall, Ti–5Al–5Mo–5V–1Cr–1Fe displays higher ultimate tensile strength and total elongation compared to Ti–5Al–5Mo–5V–2Cr–1Fe, regardless of the cooling rate.

UOW Authors


  •   Ahmed, Mansur (external author)
  •   Savvakin, Dmytro G. (external author)
  •   Ivasishin, Orest M. (external author)
  •   Pereloma, Elena

Publication Date


  • 2013

Citation


  • Ahmed, M., Savvakin, D. G., Ivasishin, O. M. & Pereloma, E. V. (2013). The effect of cooling rates on the microstructure and mechanical properties of thermo-mechanically processed Ti-Al-Mo-V-Cr-Fe alloys. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 576 167-177.

Scopus Eid


  • 2-s2.0-84877012071

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2168&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1159

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 167

End Page


  • 177

Volume


  • 576

Place Of Publication


  • Switzerland