Holographic measurement of distortion during laser melting: Additive distortion from overlapping pulses

Haglund, Peter; Frostevarg, Jan; Powell, John; Eriksson, Ingemar; Kaplan, Alexander

doi:10.1016/j.optlastec.2017.09.053

Cited by 5 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The constraining force was also larger than that of a molten pool with no added powder, which made a significant difference in distortion. Haglund [51] found that the distortion is a function of melt volume and linear incremental displacement in half-overlapping pulsed laser melting, particularly for the first four pulses. R. J. Williams also found that various heights and widths of blocks in thermal-mechanical FEA made little difference on the prediction of distortion [52].…”

Section: Validation Of Relationships Between Distortion and Tempermentioning

confidence: 99%

Assumption of Constraining Force to Explain Distortion in Laser Additive Manufacturing

et al. 2018

View full text Add to dashboard Cite

Distortion is a common but unrevealed problem in metal additive manufacturing, due to the rapid melting in metallurgy and the intricate thermal-mechanical processes involved. We explain the distortion mechanism and major influencing factors by assumption of constraining force, which is assumed between the added layer and substrate. The constraining force was set to act on the substrate in a static structural finite element analysis (FEA) model. The results were compared with those of a thermal-mechanical FEA model and experiments. The constraining force and the associated static structural FEA showed trends in distortion and stress distribution similar to those shown by thermal-mechanical FEA and experiments. It can be concluded that the constraining force acting on the substrate is a major contributory factor towards the distortion mechanism. The constraining force seems to be primarily related to the material properties, temperature, and cross-sectional area of the added layer.

show abstract

Section: Validation Of Relationships Between Distortion and Tempermentioning

confidence: 99%

Assumption of Constraining Force to Explain Distortion in Laser Additive Manufacturing

et al. 2018

View full text Add to dashboard Cite

show abstract

Further Development of Digital Image Correlation (DIC) to Measure the Discontinuous Deformation of Rock on Small-Scale Tests

Zhao

2022

Rock Mech Rock Eng

View full text Add to dashboard Cite

Observation range measuring method based on incoherent digital holographic imaging

2020

Optics and Lasers in Engineering

View full text Add to dashboard Cite

Holographic measurement of distortion during laser melting: Additive distortion from overlapping pulses

Cited by 5 publications

References 25 publications

Assumption of Constraining Force to Explain Distortion in Laser Additive Manufacturing

Assumption of Constraining Force to Explain Distortion in Laser Additive Manufacturing

Further Development of Digital Image Correlation (DIC) to Measure the Discontinuous Deformation of Rock on Small-Scale Tests

Observation range measuring method based on incoherent digital holographic imaging

Contact Info

Product

Resources

About