Skip to main content

Microstructure evolution and alloying elements distribution between the phases in powder near-b titanium alloys during thermo-mechanical processing

Journal Article


Download full-text (Open Access)

Abstract


  • In the present study, two powders near-b Ti

    alloys having a nominal composition of Ti-5Al-5Mo-5VXCr-

    1Fe (X = 1–2, wt%) were studied. The alloys were

    produced via the blended elemental powder metallurgy

    technique using hydrogenated Ti powder. Microstructure

    evolution and the distribution of the alloying elements

    between the phases were investigated after each step of

    thermo-mechanical processing (TMP). Microstructures

    were refined through the TMP in both alloys. Porosity was

    reduced with deformation at 1173 K (900 C) in the b

    phase field. The b ? a phase transformation occurred

    during soaking at 1023 K (750 C) in the a ? b phase

    field. Fragmentation of the continuous grain boundary a

    occurred because of the 40 % deformation at 1023 K

    (750 C). Variation in the concentration of the alloying

    elements in each phase took place through the diffusion

    during soaking in the a ? b phase field, e.g. exit of

    b-stabilisers from the a-phase. However, the a phase

    remained supersaturated with b stabilisers. Deformation

    had no influence on the distribution of the alloying elements.

    An addition of 1 % Cr content slightly affects the

    amount of the a phase formed and b grain size, but it has no

    noticeable effect on the distribution of the alloying elements

    between the phases.

Publication Date


  • 2012

Citation


  • Ahmed, M., Gazder, A. A., Savvakin, D. G., Ivasishin, O. M. & Pereloma, E. V. (2012). Microstructure evolution and alloying elements distribution between the phases in powder near-b titanium alloys during thermo-mechanical processing. Journal of Materials Science, 47 (19), 7013-7025.

Scopus Eid


  • 2-s2.0-84864755211

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=8255&context=engpapers&unstamped=1

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/5323

Number Of Pages


  • 12

Start Page


  • 7013

End Page


  • 7025

Volume


  • 47

Issue


  • 19

Abstract


  • In the present study, two powders near-b Ti

    alloys having a nominal composition of Ti-5Al-5Mo-5VXCr-

    1Fe (X = 1–2, wt%) were studied. The alloys were

    produced via the blended elemental powder metallurgy

    technique using hydrogenated Ti powder. Microstructure

    evolution and the distribution of the alloying elements

    between the phases were investigated after each step of

    thermo-mechanical processing (TMP). Microstructures

    were refined through the TMP in both alloys. Porosity was

    reduced with deformation at 1173 K (900 C) in the b

    phase field. The b ? a phase transformation occurred

    during soaking at 1023 K (750 C) in the a ? b phase

    field. Fragmentation of the continuous grain boundary a

    occurred because of the 40 % deformation at 1023 K

    (750 C). Variation in the concentration of the alloying

    elements in each phase took place through the diffusion

    during soaking in the a ? b phase field, e.g. exit of

    b-stabilisers from the a-phase. However, the a phase

    remained supersaturated with b stabilisers. Deformation

    had no influence on the distribution of the alloying elements.

    An addition of 1 % Cr content slightly affects the

    amount of the a phase formed and b grain size, but it has no

    noticeable effect on the distribution of the alloying elements

    between the phases.

Publication Date


  • 2012

Citation


  • Ahmed, M., Gazder, A. A., Savvakin, D. G., Ivasishin, O. M. & Pereloma, E. V. (2012). Microstructure evolution and alloying elements distribution between the phases in powder near-b titanium alloys during thermo-mechanical processing. Journal of Materials Science, 47 (19), 7013-7025.

Scopus Eid


  • 2-s2.0-84864755211

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=8255&context=engpapers&unstamped=1

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/5323

Number Of Pages


  • 12

Start Page


  • 7013

End Page


  • 7025

Volume


  • 47

Issue


  • 19