Tailored deformation behavior of 304L stainless steel through control of the crystallographic texture with laser-powder bed fusion

Materials & Design

J. Čapek¹  M. Frost²  C. Leinenbach²  R.E. Logé³  K. An⁴  E. Polatidis⁵  C. Sofras⁵  A. Arabi-Hashemi⁵  M. Strobl⁶ 

[1] EDMX-Materials Science and Engineering, École Polytechnique Fédérale de Lausanne, Route Cantonale, 1015 Lausanne, Switzerland;Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland;Neutron Scattering Division, Oak Ridge National Laboratory, TN 37831, USA;Neutron Sciences Directorate, Oak Ridge National Laboratory, TN 37831, USA;Paul Scherrer Institute, Laboratory for Neutron Scattering and Imaging (LNS), 5232 Villigen PSI, Switzerland;Thermomechanical Metallurgy Laboratory (LMTM) – PX Group Chair, École Polytechnique Fédérale de Lausanne (EPFL), 2002 Neuchâtel, Switzerland;

关键词: Additive manufacturing;    Austenite;    Stainless steel;    Martensite;    Stacking fault energy;    Neutron diffraction;   

DOI  :  

来源: DOAJ

【 摘 要 】

Laser-powder bed fusion (L-PBF) has gained significant research interest, not only for its profound advantage of producing near-net shape complex geometries of metallic parts, but also for the possibility of producing tailored microstructures. Here we exploit the capability of manipulating the crystallographic texture by L-PBF to tailor the deformation behavior of austenitic stainless steels. In specific, by adjusting the laser power and the laser scanning speed, tailored crystallographic textures can be obtained, along the uniaxial loading direction in 304L stainless steel samples produced by L-PBF. In situ neutron diffraction and uniaxial tension and compression tests are undertaken to investigate the extent of the transformation induced plasticity effect and to correlate it with the tailored macrostructures. The influence of the initial and the evolving crystallographic texture on the deformation behavior is demonstrated and elaborated accordingly. The observed asymmetry in the deformation behavior between tension and compression is also discussed in detail.

【 授权许可】

Unknown