The application of Taguchi’s method in the experimental investigation of the laser sintering process

Dingal, S.; Pradhan, Tapan; Sundar, Jeyaperumal Kalyana; Choudhury, Asimava Roy; Roy, Subhransu

doi:10.1007/s00170-007-1154-1

Cited by 55 publications

(30 citation statements)

References 42 publications

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“…If the powder is not completely melted, internal porosity can occur leading to a less hard material. Previous research found that with increasing laser power, porosity decreased [4,7,8,10], and with less porosity we expect an increase in hardness as we found in this study. O'Neill et al concluded that higher energy density from higher laser power could vaporize the powder rather than melt it [12].…”

Section: Hardnesssupporting

confidence: 82%

“…Deffley found that increasing layer thickness resulted in an increase in porosity, leading to a decrease in density, in the manufactured part [3]. Dingal et al used iron powder on a custom laser sintering system and found that increasing the powder layer thickness from 0.2 mm to 0.4 mm resulted in an increase in porosity, and a reduction of density and hardness [4].…”

Section: Changing Layer Thicknessmentioning

confidence: 99%

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The effects of laser powder bed fusion process parameters on material hardness and density for nickel alloy 625

Brown¹,

Jacob²,

Possolo³

et al. 2018

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The goal of this study was to investigate the relationship between mechanical and material properties (including density) of manufactured nickel super alloy (IN625) using a laser powder bed fusion process and three process parameters: laser power, hatch distance, and scan speed. Hardness of the manufactured blocks was measured as a representative of the mechanical properties. Density measurements were carried out using the pyncometry method. Three sets of blocks were manufactured using IN625 metal powder (nitrogen gas atomized) on a laser powder bed fusion machine. Different combinations of process parameters yielded different energy densities for each block for the three builds. The laser scan speed, laser power, hatch distance, and energy density all had statistically significant relationships with hardness. The average bulk density increased non-linearly with increasing values of energy density. A similar trend was in the hardness data. The results of this study served as a guide to determine the range of parameters yielding acceptable material properties for the investigation of process parameter sensitivities during a subsequent IN625 round robin study.

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Section: Hardnesssupporting

confidence: 82%

Section: Changing Layer Thicknessmentioning

confidence: 99%

The effects of laser powder bed fusion process parameters on material hardness and density for nickel alloy 625

Brown¹,

Jacob²,

Possolo³

et al. 2018

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“…There are more than 50 factors affect the SLS process (Van Elsen et al, 2008). However, among these parameters, the most important factors are laser power, layer thickness, laser-beam spot size, scanning speed and hatching size (Simchi and Pohl, 2003), (Dingal et al, 2007), (Chatterjee et al, 2003). Therefore, physical understanding and observation of the laser beam and material interaction, which occurs at high temperature with respect to these important parameters, are paramount in SLS/SLM research.…”

mentioning

confidence: 99%

Consolidation characteristics of ferrous-based metal powder in additive manufacturing

Alkahari

Furumoto

Ueda

et al. 2014

JAMDSM

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Selective Laser Sintering/Selective Laser Melting (SLS/SLM) is one of the most promising additive manufacturing (AM) techniques that are widely accepted by the industrial community. This is due to its high flexibility in processing different types of material under various conditions. However, the capability of the end product to have a desirable quality comparable to traditional processing techniques is still not achievable. Consolidation characteristics and the influence of processing parameters are important in determining the SLS/SLM part quality. In this paper, the consolidation process of ferrous-based metal powder is examined by monitoring the real-time consolidation process. A high-speed camera was utilized with telescopic lenses in order to monitor the interaction of laser and material within the powder fusion zone (PFZ). Based on the study, the line consolidation can be classified into five different consolidation types. The line consolidation characteristics were analyzed according to the line consolidation width, PFZ, consolidated agglomerate diameter and metal particle splattering behavior. The influence of laser power and scan speed on these characteristics was analyzed. It was also found that the line consolidation width, PFZ, consolidated agglomerate diameter and splattering were increasing with the increase of laser power. In contrast, with the increase of scan speed the result was vice versa. These phenomena can be explained with respect to the heat transfer behavior that took place during the interaction between the laser beam, metal powder and substrate surface. The consolidation mechanism that occurred during consolidation is also reported.

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“…They noted three steps were necessary: system design, parameter design and tolerance design. [69] Dingal et al [70] modeled a L8 Taguchi orthogonal design for Selective…”

Section: Research Related To Parameter Analysismentioning

confidence: 99%

“…[70] They selected peak power density, particle size, interval-spot ratio, layer thickness, stepping distance, pulse on-time and scan speed as factors and gained density, porosity, surface microhardness and mean cross hardness as responses. They noted that Taguchi could be considered as a fractional factorial experimental design that reduced the number of tests that must be run for a full factorial design.…”

Section: Research Related To Parameter Analysismentioning

confidence: 99%

Systematic parameter analysis for selective laser melting (SLM) of silver-based materials.

Rieper¹

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The application of Taguchi’s method in the experimental investigation of the laser sintering process

Cited by 55 publications

References 42 publications

The effects of laser powder bed fusion process parameters on material hardness and density for nickel alloy 625

The effects of laser powder bed fusion process parameters on material hardness and density for nickel alloy 625

Consolidation characteristics of ferrous-based metal powder in additive manufacturing

Systematic parameter analysis for selective laser melting (SLM) of silver-based materials.

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