Microstructure and Strengthening Mechanism of Powder Metallurgy Extruded Titanium Alloys with Carbon Solid Solution

DOI Web Site Web Site 17 References
  • KARIYA Shota
    Joining and Welding Research Institute, Osaka University
  • ICHIKAWA Eri
    Dept. Mechanical Engineering, Graduate School of Engineering, Osaka University
  • TERAMAE Takuma
    Dept. Mechanical Engineering, Graduate School of Engineering, Osaka University
  • LI Shufeng
    School of Materials Science and Engineering, Xi’an University of Technology
  • LI Xiaochun
    Dept. of Materials Science and Engineering, University of California
  • KONDOH Katsuyoshi
    Joining and Welding Research Institute, Osaka University
  • UMEDA Junko
    Joining and Welding Research Institute, Osaka University

Bibliographic Information

Other Title
  • 炭素固溶チタン焼結押出材の結晶組織と強化機構
  • タンソコヨウ チタン ショウケツ オシダシザイ ノ ケッショウ ソシキ ト キョウカ キコウ

Search this article

Description

<p>The effect of carbon elements on the microstructures and mechanical properties of pure Ti alloys fabricated through extruded powder metallurgy route was investigated. Furthermore, the strengthening mechanism of extruded materials was also investigated quantitatively. In Ti-C materials, the lattice parameter in c-axis of α-Ti increased due to solid solution of carbon atoms in the most stable octahedral interstitial sites. As the carbon contents increased, tensile strength was increased while maintaining a high elongation at break. The 0.2% yield stress of Ti-2.0 mass% TiC increased by 242 MPa compared with pure Ti. The elongation at break value exceeded 35.0% for all specimens. According to this analysis, it was clarified that Fm value of Ti-C materials was 2.90 × 10-10 by using Labusch model. The estimated strengthening improvement using these values was significantly agreed with the experimental results of PM Ti alloys with carbon solution atoms. Furthermore, the strengthening mechanism of the alloys was quantitatively clarified that carbon solution strengthening was the dominant factor in this study.</p>

Journal

References(17)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top