Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5459053 | Journal of Alloys and Compounds | 2017 | 23 Pages |
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 â¼390 °C and â¼340 °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.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
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,