Friction stir processing on Ti6Al4V produced by Selective Laser Melting: microstructure and mechanical properties

Huang, Chunjie;Zhao, Lv;Yan, Xingchen;Liu, Min;Simar, Aude;et.al.
(2019) 6th International Conference on Scientific and Technical Advances on Friction Stir Welding & Processing — Location: Louvain-la-Neuve, Belgium (11.September.2019)

Files

FrictionstirprocessingonTi6A14V.pdf
  • Open Access
  • Adobe PDF
  • 214.66 KB
Download

Details

Authors
  • Huang, ChunjieUCLouvain
    Author
  • Zhao, Lvorcid-logoUCLouvain
    Author
  • Yan, XingchenUTBM, France
    Author
  • Liu, MinGuangdong Institute of New Materials, China
    Author
  • Simar, Audeorcid-logoUCLouvain
    Author
Show more
Abstract
The low ductility of Ti6Al4V alloy manufactured by Selective Laser Melting (SLM) adversely impacts the component performance in practical applications. A local post-treatment by Friction Stir Processing (FSP) significantly reduces the porosity and homogenizes the microstructure. This results in an increase in fracture strain from 0.21 after SLM to 0.65 following the FSP post-treatment. The porosity reduction was evidenced by 3D X-ray micro-computed tomography. A fully transformed β microstructure is formed after FSP. This microstructure involves α plates, α colonies, as well as equiaxed dynamically recrystallized α phases inside equiaxed prior-β grains. The deformed microstructure was observed during in-situ tensile test, using scanning electron microscopy, with the aim to unravel the damage mechanisms. In addition to the beneficial effect of initial porosity reduction, the transformed microstructure after FSP bears more damage before failure than the typical α’ martensite laths in the as-built SLM samples.
Affiliations

Citations

  • APA
  • Chicago
  • FWB

Huang, C., Zhao, L., Yan, X., Liu, M., Ma, W., Wang, W., Soete, J., & Simar, A. (2019). Friction stir processing on Ti6Al4V produced by Selective Laser Melting: microstructure and mechanical properties. 6th International Conference on Scientific and Technical Advances on Friction Stir Welding & Processing, Louvain-la-Neuve, Belgium. https://hdl.handle.net/2078.5/62404