Titanium-Tantalum Alloy Powder Produced by the Plasma Rotating Electrode Process (PREP)

Abstract:

Article Preview

Microstructure of Ti-28Ta powders produced by plasma rotating electrode process (PREP) was investigated by using scanning electron microscopy (SEM), optical microscopy (OM), and transmission electronic microscopy (TEM). Phase constituent of the PREP Ti-28Ta powders was analyzed by X-ray diffraction (XRD). It was found that microstructure of the PREP Ti-28Ta powders was dependent on the powder particle sizes. Predominant martensitic α”, some metastable β and trace athermal ω phases were observed in the powders with the small diameter. While, phase constituent of the PREP Ti-28Ta powders with the large particle size was predominant metastable β, some martensitic α” and trace athermal ω. With the reduction of the powder particle size, the amount of martensitic α” increased and the metastable β decreased. The martensitic α” was formed preferentially on the metastable β grain boundaries of the PREP Ti-28Ta powders. The increase of α” phase and decrease of β with reduction of the powder particle size is attributed to the increase of the volume of the grain boundaries due to the grain refinement.

Info:

Periodical:

Edited by:

Huiping Tang, Ma Qian, Yong Liu, Peng Cao and Gang Chen

Pages:

18-22

Citation:

J. G. Yin et al., "Titanium-Tantalum Alloy Powder Produced by the Plasma Rotating Electrode Process (PREP)", Key Engineering Materials, Vol. 770, pp. 18-22, 2018

Online since:

May 2018

Export:

Price:

$38.00

[1] Y.L. Zhou, M. Niinomi, T. Akahori, Effects of Ta content on Young's modulus and tensile properties of binary Ti-Ta alloys for biomedical applications, Mater. Sci. Eng. A 371 (2004) 283-290.

DOI: https://doi.org/10.1016/j.msea.2003.12.011

[2] P.J.S. Buenconsejo, H.Y. Kim, H. Hosoda, S. Miyazaki, Shape memory behavior of Ti-Ta and its potential as a high-temperature shape memory alloy, Acta Mater. 57 (2009) 1068-1077.

DOI: https://doi.org/10.1016/j.actamat.2008.10.041

[3] K.A. de Souza, A. Robin, Preparation and characterization of Ti-Ta alloys for application in corrosive media, Mater. Lett. 57 (2003) 3010-3016.

DOI: https://doi.org/10.1016/s0167-577x(02)01422-2

[4] R.W. Margevicius, J.D. Cotton, Stress-assisted transformation in Ti-60 wt pct Ta alloys, Metall. Mater. Trans. A 29 (1998) 139-147.

DOI: https://doi.org/10.1007/s11661-998-0166-2

[5] K.A. Bywater, J.W. Christian, Martensitic transformations in titanium-tantalum alloys, Philos. Mag. 25 (1972) 1249-1273.

DOI: https://doi.org/10.1080/14786437208223852

[6] S. Hata, K. Oki, T. Hashimoto, N. Kuwano, Microstructures of Ti50Al45Mo5 alloy powders produced by plasma rotating electrode process, JPE 22 (2001) 386-393.

DOI: https://doi.org/10.1361/105497101770332938

[7] T.F. Broderick, A.G. Jackson, H. Jones, F.H. Froes, The effect of cooling conditions on the microstructure of rapidly solidified Ti-6Al-4V, Metall. Mater. Trans. A 16 (1985) 1951-(1959).

DOI: https://doi.org/10.1007/bf02662396

[8] J. Zhang, R. Rynko, J. Frenzel, C. Somsen, G. Eggeler, Ingot metallurgy and microstructural characterization of Ti-Ta alloys, Int. J. Mater. Res. 105 (2013) 156-167.

DOI: https://doi.org/10.3139/146.111010

[9] D.H. Ping, Y. Mitarai, F.X. Yin, Microstructure and shape memory behavior of a Ti-30Nb-3Pd alloy, Scr. Mater. 52 (2005) 1287-1291.

DOI: https://doi.org/10.1016/j.scriptamat.2005.02.029

[10] R. D. Dar, Y. Chen, Nanoscale martensitic phase transition at interfaces in shape memory materials, Appl. Phys. Lett. 110 (2017) 041906.

DOI: https://doi.org/10.1063/1.4974990

[11] P. La Roca, L. Isola, P. Vermaut, J. Malarría, Relationship between martensitic plate size and austenitic grain size in martensitic transformations, Appl. Phys. Lett. 106 (2015) 221903.

DOI: https://doi.org/10.1063/1.4922195