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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


  • 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 �� (��ath)-assisted nucleation of �� phase (���1 nm) was revealed by high resolution STEM. No presence of ��ath was detected after heating to 450 ��C, which was explained by its consumption by intragranular �� and dissolution. While binomial analysis of APT data after thermo-mechanical processing revealed no changes in chemical composition of ��ath compared to that of �� matrix, heating the sample up to 375 ��C resulted in Ti���rich domains depleted in both �� and �� stabilisers. The results suggested the simultaneous occurrence of displacive and diffusional mechanisms for formation and growth of intragranular ��.

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. doi:10.1016/j.matchar.2020.110172

Scopus Eid


  • 2-s2.0-85078700143

Web Of Science Accession Number


Volume


  • 161

Issue


Place Of Publication


Abstract


  • 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 �� (��ath)-assisted nucleation of �� phase (���1 nm) was revealed by high resolution STEM. No presence of ��ath was detected after heating to 450 ��C, which was explained by its consumption by intragranular �� and dissolution. While binomial analysis of APT data after thermo-mechanical processing revealed no changes in chemical composition of ��ath compared to that of �� matrix, heating the sample up to 375 ��C resulted in Ti���rich domains depleted in both �� and �� stabilisers. The results suggested the simultaneous occurrence of displacive and diffusional mechanisms for formation and growth of intragranular ��.

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. doi:10.1016/j.matchar.2020.110172

Scopus Eid


  • 2-s2.0-85078700143

Web Of Science Accession Number


Volume


  • 161

Issue


Place Of Publication