In situ synthesis of a binary Ti–10at% Nb alloy by electron beam melting using a mixture of elemental niobium and titanium powders

Maria A. Surmeneva, Andrey Koptyug, Dmitriy Khrapov, Yuriy F. Ivanov, Tatiana Mishurova, Sergei Evsevleev, Oleg Prymak, Katerina Loza, Matthias Epple, Giovanni Bruno, Roman A. Surmenev

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Abstract

This study reports the results of the preliminary assessment to fabricate Ti-10at% Nb alloy by electron beam melting (EBM®) from a blend of elemental Nb and Ti powders. The microstructure of the EBM-manufactured Ti-10at% Nb alloys is sensitive to the following factors: different sintering properties of Nb and Ti powders, powder particle properties, material viscosities at varying melt pool temperatures, β-stabilizer element content and the EBM® process parameters. Three phases were observed in as-manufactured Ti-10at% Nb alloy: μm-size Nb phase, a Nb-rich β-solid solution surrounding Nb phase, lamellar structured α-phase and β-solid solution with different distribution and volume fraction. Thus, the combination of powder particle characteristics, very short time material spends in molten condition and sluggish kinetics of mixing and diffusional process in Ti-Nb alloy results in heterogeneous microstructures depending on the local Nb content in the powder blend and the EBM® process conditions.

Original languageEnglish
Article number116646
JournalJournal of Materials Processing Technology
Volume282
DOIs
Publication statusPublished - Aug 2020

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Keywords

  • Additive manufacturing
  • Blended powders
  • Electron beam melting
  • In situ alloying
  • Low-modulus alloy
  • Solid solution
  • Ti-Nb alloy

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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