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The effect of continuous heating on microstructure development in thermo-mechanically processed Ti-10V-3Fe-3Al alloy produced by powder metallurgy

Journal Article


Abstract


  • © 2020 Elsevier Inc. Both scanning transmission electron microscopy (STEM) and atom probe tomography (APT) were exploited to study variations in chemical composition and phases that took place during thermo-mechanical processing and following slow continuous heating of Ti-10V-3Fe-3Al (wt%) alloy. For the first time for the rapid-cooled alloys, athermal ω (ωath)-assisted nucleation of α phase (≈1 nm) was revealed by high resolution STEM. No presence of ωath was detected after heating to 450 °C, which was explained by its consumption by intragranular α and dissolution. While binomial analysis of APT data after thermo-mechanical processing revealed no changes in chemical composition of ωath compared to that of β matrix, heating the sample up to 375 °C resulted in Ti–rich domains depleted in both α and β stabilisers. The results suggested the simultaneous occurrence of displacive and diffusional mechanisms for formation and growth of intragranular α.

Authors


  •   Samiee, Alireza (external author)
  •   Ahmed, Mansur (external author)
  •   Yang, Limei (external author)
  •   Pereloma, Elena V.

Publication Date


  • 2020

Citation


  • Samiee, A., Ahmed, M., Yang, L. & Pereloma, E. (2020). The effect of continuous heating on microstructure development in thermo-mechanically processed Ti-10V-3Fe-3Al alloy produced by powder metallurgy. Materials Characterization, 161

Scopus Eid


  • 2-s2.0-85078700143

Volume


  • 161

Place Of Publication


  • United States

Abstract


  • © 2020 Elsevier Inc. Both scanning transmission electron microscopy (STEM) and atom probe tomography (APT) were exploited to study variations in chemical composition and phases that took place during thermo-mechanical processing and following slow continuous heating of Ti-10V-3Fe-3Al (wt%) alloy. For the first time for the rapid-cooled alloys, athermal ω (ωath)-assisted nucleation of α phase (≈1 nm) was revealed by high resolution STEM. No presence of ωath was detected after heating to 450 °C, which was explained by its consumption by intragranular α and dissolution. While binomial analysis of APT data after thermo-mechanical processing revealed no changes in chemical composition of ωath compared to that of β matrix, heating the sample up to 375 °C resulted in Ti–rich domains depleted in both α and β stabilisers. The results suggested the simultaneous occurrence of displacive and diffusional mechanisms for formation and growth of intragranular α.

Authors


  •   Samiee, Alireza (external author)
  •   Ahmed, Mansur (external author)
  •   Yang, Limei (external author)
  •   Pereloma, Elena V.

Publication Date


  • 2020

Citation


  • Samiee, A., Ahmed, M., Yang, L. & Pereloma, E. (2020). The effect of continuous heating on microstructure development in thermo-mechanically processed Ti-10V-3Fe-3Al alloy produced by powder metallurgy. Materials Characterization, 161

Scopus Eid


  • 2-s2.0-85078700143

Volume


  • 161

Place Of Publication


  • United States