Microstructure and mechanical properties of a spark plasma sinteredTi-45Al-8.5Nb-0.2W-0.2B-0.1Y alloy

X. Lu, X. B. He, B. Zhang, L. Zhang, X. H. Qu, Z. X. Guo

研究成果: Article

48 引用 (Scopus)

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A high Nb containing TiAl alloy from pre-alloyed powder of Ti-45Al-8.5Nb-0.2B-0.2W-0.1Y was processed by spark plasma sintering (SPS). The effects of sintering temperature on the microstructure and mechanical properties were studied. The optimized conditions yield high densities and uniform microstructure. Specimens sintered at 1100 °C are characterized by fine duplex microstructure, leading to superior room temperature mechanical properties with a tensile strength of 1024 MPa and an elongation of 1.16%. Specimens sintered at 1200 °C are of fully lamellar microstructure with a tensile strength of 964 MPa and an elongation of 0.88%. The main fracture mode in the duplex microstructure was transgranular in the equiaxed γ grains and interlamellar in the lamellar colonies. For the fully lamellar structure, the fracture mode was dominated by interlamellar, translamellar and stepwise failure.

元の言語English
ページ(範囲)840-846
ページ数7
ジャーナルIntermetallics
17
発行部数10
DOI
出版物ステータスPublished - 2009 10 1
外部発表Yes

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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