Predicting defects in SLM-produced parts based on melt pools clustering analysis

Malashin, Ivan; Martysyuk, Dmitriy; Tynchenko, Vadim; Evsyukov, Dmitriy; Nelyub, Vladimir; Borodulin, Aleksei; Gantimurov, Andrei; Galinovsky, Andrey

doi:10.1007/s00170-024-14134-1

Int J Adv Manuf Technol

2024

DOI: 10.1007/s00170-024-14134-1

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Predicting defects in SLM-produced parts based on melt pools clustering analysis

Ivan Malashin,

Dmitriy Martysyuk,

Vadim Tynchenko

et al.

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Effects of Build Direction and Heat Treatment on the Defect Characterization and Fatigue Properties of Laser Powder Bed Fusion Ti6Al4V

Sun,

Ma,

et al. 2024

Aerospace

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Laser powder bed fusion (LPBF) is one of the high-precision additive manufacturing techniques for producing complex 3D components. It is well known that defects appear in additive-manufactured parts, and they deeply affect the fatigue properties; even heat treatment is performed after printing. In order to meet the safe-life design requirements of additive-manufactured aircraft structures, the effects of build direction and heat treatment on defects and fatigue properties need to be quantified. Hence, Ti6Al4V alloy samples with different build directions were designed and printed by LPBF. X-ray computed tomography was used to quantitatively analyze the defect size, the sphericity, and the defect orientation. And their effects on fatigue properties were studied. An extended effective defect size and a defect-based fatigue anisotropy evaluation process are proposed to qualify the effects of the defect size, sphericity, and defect orientation. It is shown that the build direction can affect the porosity distribution and maximum defect size, while the annealing treatment can cause the coalescence of small defects and higher porosity. The defect orientation exhibited a fluctuating trend of 0°–90°–0°–90°–0° as the volume increased. The elongated lack of fusion defects related to the build direction was the main crack source and could lead to fatigue anisotropy of LPBF Ti6Al4V.

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Effects of Build Direction and Heat Treatment on the Defect Characterization and Fatigue Properties of Laser Powder Bed Fusion Ti6Al4V

Sun,

Ma,

et al. 2024

Aerospace

View full text Add to dashboard Cite

show abstract

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Predicting defects in SLM-produced parts based on melt pools clustering analysis

Cited by 1 publication

References 36 publications

Effects of Build Direction and Heat Treatment on the Defect Characterization and Fatigue Properties of Laser Powder Bed Fusion Ti6Al4V

Effects of Build Direction and Heat Treatment on the Defect Characterization and Fatigue Properties of Laser Powder Bed Fusion Ti6Al4V

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