Enhancing Microstructural Characteristics and Mechanical Properties of Ti-Al-Dy Alloy through Ball Milling and SPS Consolidation

• Autorzy: Lee Hyunseung , Chang Si Young

Identyfikatory

DOI

10.24425/amm.2024.149770

• Języki publikacji: EN

Abstrakty

EN

In this study, pure Ti, Al, Dy powders were ball-milled with zirconia balls in argon atmosphere for 3 h at 800 rpm, producing a Ti- 6 wt.% Al- 4 wt.% Dy alloy powder. The alloy powder was consolidated by SPS technique at 1373 K for 15 min under 50 MPa pressure in vacuum. The sintered body had approximately 99% in density and 6 μm in grain size. XRD and TEM revealed the presence of the second phases such as Ti₃Al, Al₃Dy and Ti₄Al₂₀Dy phases, and their sizes were approximately 50 nm. Microhardness was approximately 960 Hv at room temperature, which decreased as temperature increased. However, there remained the micro-hardness significantly higher compared to the commercial Ti-6Al-4V alloy. After hardness test at 1173 K, XRD analysis did not show any difference in peaks, while the grain size and second phases size increased by ~4 μm and ~2 nm, respectively.

Słowa kluczowe

EN

high energy ball milling; SPS; Ti-Al-Dy; high temperature hardness; microstructure

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2024
• Tom: Vol. 69, iss. 2
• Strony: 475--478
• Opis fizyczny: Bibliogr. 18 poz., fot., rys.

Twórcy

autor

Lee Hyunseung

• Korea Aerospace University, Department of Materials Science and Engineering, Goyang, Korea

• https://orcid.org/0000-0003-0368-4041

autor

Chang Si Young

• Korea Aerospace University, Department of Materials Science and Engineering, Goyang, Korea

• https://orcid.org/0000-0002-9623-7699

Bibliografia

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Uwagi

This work was supported by the Ministry of Trade, Industry and Energy (MOTIE, Korea) under Industrial Technology Innovation Program, No. 20000970