Microstructural characterization and properties of Ti-28Ta at.% powders produced by plasma rotating electrode process

J. O. Yin; G. Chen; S. Y. Zhao; Y. Ge; Z. F. Li; P. J. Yang; W. Z. Han; J. Wang; H. P. Tang; P. Cao

doi:10.1016/j.jallcom.2017.04.195

Microstructural characterization and properties of Ti-28Ta at.% powders produced by plasma rotating electrode process

J. O. Yin, G. Chen, S. Y. Zhao, Y. Ge, Z. F. Li, P. J. Yang, W. Z. Han, J. Wang, H. P. Tang, P. Cao

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

42 Citations (Scopus)

Abstract

Ti-28 at.%Ta powders were produced by rapid solidification via plasma rotating electrode process (PREP). It is found that microstructure, morphology and phase constituents of Ti-28Ta powders are particle size dependent. Small powder particle exhibit the formation of predominant martensitic α” and minor metastable β, whilst large particles consist of primary metastable β with minor martensitic α” phase. The amount of martensitic α” increases while the amount of metastable β phase decreases with decreasing the particle size. The martensitic α” lath with the size of about 50 nm wide and 1 μm long are formed preferentially at the β grain boundaries. The martensitic transformation start temperature (M_s) and peak temperature (M_p) are ∼390 °C and ∼340 °C respectively for the Ti-28Ta powders with the particle size between 40 and 65 μm. An increased Vickers micro-hardness is obtained and is associated with decreasing particle size. © 2017 Elsevier B.V.

Original language	English
Pages (from-to)	222-228
Journal	Journal of Alloys and Compounds
Volume	713
DOIs	https://doi.org/10.1016/j.jallcom.2017.04.195
Publication status	Published - 2017
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

Funding

We acknowledge the financial support from Shaanxi Science and Technology Co-ordination and Innovation Project (Contract No. 2016KTCQ01-113), Shaanxi Youth Science and Technology New Star Project (Contract No. 2016KJXX-78), and Professor Ma Qian at RMIT University Australia. This work is also supported by the State Key Laboratory for Powder Metallurgy, Central South University, P. R. China. We also acknowledge Mr. Lei Shen and Ms. Jiayi Wen at Northwest Institute for Non-ferrous Metal Research for their technical assistance.

Research Keywords

Martensitic transformation
Plasma rotating electrode process (PREP)
Rapid solidification
Ti-Ta alloy

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title = "Microstructural characterization and properties of Ti-28Ta at.% powders produced by plasma rotating electrode process",

abstract = "Ti-28 at.%Ta powders were produced by rapid solidification via plasma rotating electrode process (PREP). It is found that microstructure, morphology and phase constituents of Ti-28Ta powders are particle size dependent. Small powder particle exhibit the formation of predominant martensitic α” and minor metastable β, whilst large particles consist of primary metastable β with minor martensitic α” phase. The amount of martensitic α” increases while the amount of metastable β phase decreases with decreasing the particle size. The martensitic α” lath with the size of about 50 nm wide and 1 μm long are formed preferentially at the β grain boundaries. The martensitic transformation start temperature (Ms) and peak temperature (Mp) are ∼390 °C and ∼340 °C respectively for the Ti-28Ta powders with the particle size between 40 and 65 μm. An increased Vickers micro-hardness is obtained and is associated with decreasing particle size. {\textcopyright} 2017 Elsevier B.V.",

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AU - Yin, J. O.

AU - Chen, G.

AU - Zhao, S. Y.

AU - Ge, Y.

AU - Li, Z. F.

AU - Yang, P. J.

AU - Han, W. Z.

AU - Wang, J.

AU - Tang, H. P.

AU - Cao, P.

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PY - 2017

Y1 - 2017

N2 - Ti-28 at.%Ta powders were produced by rapid solidification via plasma rotating electrode process (PREP). It is found that microstructure, morphology and phase constituents of Ti-28Ta powders are particle size dependent. Small powder particle exhibit the formation of predominant martensitic α” and minor metastable β, whilst large particles consist of primary metastable β with minor martensitic α” phase. The amount of martensitic α” increases while the amount of metastable β phase decreases with decreasing the particle size. The martensitic α” lath with the size of about 50 nm wide and 1 μm long are formed preferentially at the β grain boundaries. The martensitic transformation start temperature (Ms) and peak temperature (Mp) are ∼390 °C and ∼340 °C respectively for the Ti-28Ta powders with the particle size between 40 and 65 μm. An increased Vickers micro-hardness is obtained and is associated with decreasing particle size. © 2017 Elsevier B.V.

AB - Ti-28 at.%Ta powders were produced by rapid solidification via plasma rotating electrode process (PREP). It is found that microstructure, morphology and phase constituents of Ti-28Ta powders are particle size dependent. Small powder particle exhibit the formation of predominant martensitic α” and minor metastable β, whilst large particles consist of primary metastable β with minor martensitic α” phase. The amount of martensitic α” increases while the amount of metastable β phase decreases with decreasing the particle size. The martensitic α” lath with the size of about 50 nm wide and 1 μm long are formed preferentially at the β grain boundaries. The martensitic transformation start temperature (Ms) and peak temperature (Mp) are ∼390 °C and ∼340 °C respectively for the Ti-28Ta powders with the particle size between 40 and 65 μm. An increased Vickers micro-hardness is obtained and is associated with decreasing particle size. © 2017 Elsevier B.V.

KW - Martensitic transformation

KW - Plasma rotating electrode process (PREP)

KW - Rapid solidification

KW - Ti-Ta alloy

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Microstructural characterization and properties of Ti-28Ta at.% powders produced by plasma rotating electrode process

Abstract

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Research Keywords

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