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Open AccessArticle

The Polythermal Section of Ti-22Al-xNb (30-78at.%Ti) in Ti–Al–Nb System

1
School of Materials Science and Engineering, Central South University, Changsha 410083, China
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State Key Laboratory of Powder Metallurgy, Changsha 410083, China
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Key Laboratory of Non-ferrous Metallic Materials Science and Engineering, Ministry of Education, Changsha 410083, China
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Faculty of Mechanical Engineering, Koszalin University of Technology, ul. Śniadeckich 2, 75-453 Koszalin, Poland
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Technallium Engineering & Consulting, Fliederweg 6, D-92449 Steinberg am See, Germany
*
Authors to whom correspondence should be addressed.
Metals 2020, 10(7), 871; https://doi.org/10.3390/met10070871
Received: 24 May 2020 / Revised: 21 June 2020 / Accepted: 24 June 2020 / Published: 30 June 2020
The polythermal section of Ti-22Al-xNb (30–78 at.% Ti) in the Ti-Al-Nb system was studied using X-ray diffraction analysis (XRD), differential thermal analysis (DSC), and electron probe micro-analysis (EPMA). No new ternary compounds were found in this work. The polythermal section has five three-phase regions, nine two-phase regions, and three single-phase regions. The O phase transition is confirmed to occur below 1000 °C. A four-phase invariant reaction β + σ → O + δ was found at 931 °C.
Keywords: Ti-Al-Nb system; phase diagram; polythermal section Ti-Al-Nb system; phase diagram; polythermal section
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MDPI and ACS Style

Zhao, Y.; Liu, L.-B.; Zhang, L.-G.; Yang, J.-J.; Masset, P.J. The Polythermal Section of Ti-22Al-xNb (30-78at.%Ti) in Ti–Al–Nb System. Metals 2020, 10, 871.

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