Improved Mechanical Properties of Additive Manufactured Ti-6Al-4V Alloy via Annealing in High Magnetic Field

Ruifeng Zhao, Jinshan Li, Ying Zhang, Peixuan Li, Jiaxiang Wang, Chengxiong Zou, Bin Tang, Hongchao Kou, Bin Gan, Liang Zhang, Jun Wang, William Yi Wang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A novel magnetic-field-driving approach was proposed and used to efficiently enhance the mechanical properties of selective laser melting (SLM) Ti-6Al-4V. The microstructures of the as-built and the SLM specimens annealed at 400, 800℃ below the β transus, and 1200℃ above the β transus for 30 min in the high magnetic field of 7 T were comprehensively characterized in terms of X-ray diffraction, optical microscope, scanning electron microscope, and atomic force microscope. Lattice distortions induced by Al and V atoms were characterized by bonding charge density, providing an insight into the atomic and electronic basis for the solid solution strengthening mechanism and the martensitic transformation mechanism. Referring to the as-built specimens, the ultimate tensile strength and the elongation of annealed specimens at 400 and 1200℃ in 7 T high magnetic field increase due to the short annealing time. Based on the coupling effect of force field induced by the heat and magnetic, it is expected that the microstructures of SLM Ti-6Al-4V would be conventionally optimized through changing the phase transformation thermodynamics. The validation of this hypothesis will pave a path to develop a novel magnetic-field-driving approach efficiently enhancing the mechanical properties of additive manufactured materials.

Translated title of the contribution强磁场下退火提高增材制造Ti-6Al-4V合金力学性能的研究
Original languageEnglish
Pages (from-to)3678-3685
Number of pages8
JournalXiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume47
Issue number12
StatePublished - 1 Dec 2018

Keywords

  • Bonding charge density
  • Heat treatment
  • Selective laser melting
  • Ti-6Al-4V

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