期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 902, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.163794
关键词
Ti2AlNb orthorhombic alloys; Ball milling; Rapid solidification; Intermetallic hydride; HDH-powders
资金
- Russian Science Foundation [19-79-00327]
- Russian Science Foundation [19-79-00327] Funding Source: Russian Science Foundation
The phase composition and microstructure of a rapidly solidified Ti2AlNb-based alloy containing hydrogen were studied for their effect on alloy deformation during ball milling and production of a fine-dispersed powder. It was found that hydrogen content significantly influenced the alloy's ductility and ball milling efficiency.
In this work we have studied the effect of phase composition and microstructure of a rapidly solidified Ti2AlNb-based alloy containing hydrogen on deformation of the alloy during ball milling and production of a fine-dispersed powder. Hydrogen is introduced into the alloy up to a concentration of 2.0 wt%. The X-Ray diffraction (XRD) analysis and Scanning Electron Microscopy (SEM) show that the alloy has the following phase compositions depending on hydrogen content: beta + O, beta/beta-hydride, beta/beta-hydride + intermetallic hydride (Ti2AlNbHx) or a single-phase intermetallic hydride. It is found that in the hydrogenated beta + O alloy containing a small amount of hydrogen a strong decrease in ductility occurs, but this does not affect the ball milling and synthesis of the fine-dispersed powder. Efficient milling of the rapidly solidified alloy has been achieved when hydrogen content was 1.2 wt% and exceeding this value when a transformation from the H saturated solid solution into a hydride phase is observed in the alloy or the formation of a single phase hydride occurs. (C) 2022 Elsevier B.V. All rights reserved.
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