Experimental investigation and numerical modeling of laser powder bed fusion process-induced angle-dependent defects in strut-based lattice structure

Jia, Heran; Liu, Bin; Zhao, Zeang; Duan, Shengyu; Wang, Panding; Lei, Hongshuai

doi:10.1016/j.matdes.2022.111354

Materials & Design

2022

DOI: 10.1016/j.matdes.2022.111354

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Experimental investigation and numerical modeling of laser powder bed fusion process-induced angle-dependent defects in strut-based lattice structure

Heran Jia

Bin Liu²,

Zeang Zhao³

et al.

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Cited by 14 publications

References 33 publications

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Additive manufacturing of continuous wave and pulsed wave L-PBF Ti64 thin cross sections

Arputharaj,

Nafisi,

Ghomashchi

2024

Prog Addit Manuf

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The additive manufacturing of titanium alloys, particularly Ti–6Al–4V (Ti64), via Laser Powder Bed Fusion (L-PBF) techniques, has garnered significant attention due to the potential for creating complex geometries and reducing material waste. This study compares the Continuous Wave (CW) and Pulsed Wave (PW) L-PBF methods in fabricating thin Ti64 struts, essential for biomedical applications such as lattice-structured implants. The feasibility of manufacturing cylindrical struts with diameters ranging from 0.1 to 1.0 mm and angles of inclination between 10° and 90° has been explored. Findings indicate that CW L-PBF produces finer struts with consistent cross sections but tends to generate higher surface roughness due to heat accumulation and sintered particles. In contrast, in this case, PW L-PBF achieves better retention of the designed angles and smoother surfaces at higher inclinations but struggles with strut dimensions at lower angles due to contour scanning which helps improve shape retention at high angle of inclinations. Microstructural analysis reveals that PW L-PBF results in a bit finer α′ martensitic needles, attributed to higher cooling rates, generated due to the pulsed laser mode, while CW L-PBF shows coarser structures due to continuous heat input resulting in a prolonged thermal cycling effect.

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Additive manufacturing of continuous wave and pulsed wave L-PBF Ti64 thin cross sections

Arputharaj,

Nafisi,

Ghomashchi

2024

Prog Addit Manuf

View full text Add to dashboard Cite

show abstract

Subdivisional modelling method for matched metal additive manufacturing and its implementation on novel negative Poisson's ratio lattice structures

Pan

Yan

et al. 2023

Additive Manufacturing

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Influence mechanism of cell-arrangement strategy on energy absorption of dual-phase hybrid lattice structure

Hua-guang

Feng

et al. 2023

International Journal of Impact Engineering

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Experimental investigation and numerical modeling of laser powder bed fusion process-induced angle-dependent defects in strut-based lattice structure

Cited by 14 publications

References 33 publications

Additive manufacturing of continuous wave and pulsed wave L-PBF Ti64 thin cross sections

Additive manufacturing of continuous wave and pulsed wave L-PBF Ti64 thin cross sections

Subdivisional modelling method for matched metal additive manufacturing and its implementation on novel negative Poisson's ratio lattice structures

Influence mechanism of cell-arrangement strategy on energy absorption of dual-phase hybrid lattice structure

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