TY  - JOUR
A1  - Nadammal, Naresh
A1  - Mishurova, Tatiana
A1  - Fritsch, Tobias
A1  - Serrano-Munoz, Itziar
A1  - Kromm, Arne
A1  - Haberland, Christoph
A1  - Portella, Pedro Dolabella
A1  - Bruno, Giovanni
T1  - Critical role of scan strategies on the development of microstructure, texture, and residual stresses during laser powder bed fusion additive manufacturing
JF  - Additive manufacturing
N2  - Laser based powder bed fusion additive manufacturing offers the flexibility to incorporate standard and user-defined scan strategies in a layer or in between the layers for the customized fabrication of metallic components. In the present study, four different scan strategies and their impact on the development of microstructure, texture, and residual stresses in laser powder bed fusion additive manufacturing of a nickel-based superalloy Inconel 718 was investigated. Light microscopy, scanning electron microscopy combined with electron back-scatter diffraction, and neutron diffraction were used as the characterization tools. Strong textures with epitaxially grown columnar grains were observed along the build direction for the two individual scan strategies. Patterns depicting the respective scan strategies were visible in the build plane, which dictated the microstructure development in the other planes. An alternating strategy combining the individual strategies in the successive layers and a 67 degrees rotational strategy weakened the texture by forming finer micro-structural features. Von Mises equivalent stress plots revealed lower stress values and gradients, which translates as lower distortions for the alternating and rotational strategies. Overall results confirmed the scope for manipulating the microstructure, texture, and residual stresses during laser powder bed fusion additive manufacturing by effectively controlling the scan strategies.
KW  - Additive manufacturing
KW  - Laser powder bed fusion
KW  - Nickel-based
KW  - superalloys
KW  - Scan strategies
KW  - Residual stresses
KW  - Microstructure and
KW  - texture
Y1  - 2021
U6  - https://doi.org/10.1016/j.addma.2020.101792
SN  - 2214-8604
VL  - 38
PB  - Elsevier
CY  - Amsterdam
ER  -