TY - JOUR

T1 - Influence of Hatch Strategy on Crystallographic Texture Evolution, Mechanical Anisotropy of Laserbeam Powder Bed Fused S316L Steel

AU - Bodner, Sabine

AU - Hlushko, Kostiantyn

AU - Kutleša, Kevin

AU - Todt, Juraj

AU - Renk, Oliver

AU - Meindlhumer, Michael

AU - Resch, Florian

AU - Nielsen, Marc-André

AU - Keckes, Jozef

AU - Eckert, Jürgen

N1 - Publisher Copyright: © 2022 The Authors. Advanced Engineering Materials published by Wiley-VCH GmbH.

PY - 2022/8/2

Y1 - 2022/8/2

N2 - The correlations between process conditions, microstructure, and mechanical properties of additively manufactured components are not fully understood yet. In this contribution, three different hatch strategies are used to fabricate rod-like samples from S316L stainless steel, which are further investigated using synchrotron diffraction, optical microscopy, and tensile tests. The results indicate the presence of ⟨110⟩ biaxial and fiber textures, whose sharpness depends on the applied hatch strategy. Mechanical tests reveal a strong correlation of the samples’ response to the observed anisotropy in the plane perpendicular to the build direction. Even though the average yield and ultimate tensile strengths of around 475 and 500 MPa, respectively, do not differ significantly, the stress–strain behavior can be correlated with the observed in-plane anisotropy. Particularly, twinning-induced plasticity, a distinct increase of the work hardening rate at larger strains and elliptical necking are observed in some samples with biaxial (Goss) texture. These findings indicate that texture design by means of applying dedicated hatch strategies can be used to effectively tune the multiaxial deformation behavior of components produced by laser powder bed fusion.

AB - The correlations between process conditions, microstructure, and mechanical properties of additively manufactured components are not fully understood yet. In this contribution, three different hatch strategies are used to fabricate rod-like samples from S316L stainless steel, which are further investigated using synchrotron diffraction, optical microscopy, and tensile tests. The results indicate the presence of ⟨110⟩ biaxial and fiber textures, whose sharpness depends on the applied hatch strategy. Mechanical tests reveal a strong correlation of the samples’ response to the observed anisotropy in the plane perpendicular to the build direction. Even though the average yield and ultimate tensile strengths of around 475 and 500 MPa, respectively, do not differ significantly, the stress–strain behavior can be correlated with the observed in-plane anisotropy. Particularly, twinning-induced plasticity, a distinct increase of the work hardening rate at larger strains and elliptical necking are observed in some samples with biaxial (Goss) texture. These findings indicate that texture design by means of applying dedicated hatch strategies can be used to effectively tune the multiaxial deformation behavior of components produced by laser powder bed fusion.

UR - https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202200524

UR - http://www.scopus.com/inward/record.url?scp=85135943448&partnerID=8YFLogxK

U2 - 10.1002/adem.202200524

DO - 10.1002/adem.202200524

M3 - Article

VL - 2022

JO - Advanced engineering materials

JF - Advanced engineering materials

SN - 1527-2648

M1 - 2200524

ER -