In-situ monitoring of substrate deformation in directed energy deposition process using the coherent gradient sensing method

Li, Jiaqiang; Duan, Qiyuan; Hou, Junsong; Xie, Huimin; Liu, Sheng

doi:10.1016/j.addma.2020.101547

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…18 Whereas, Coherent Gradient Sensing (CGS) technique was used by Li et al to determine the deflection rates. 19 The above literature investigates and compare different aspects like scan pattern, interlayer dwell time, forms of cladding material, substrate thickness, preheating, etc. Further, few studies indicate that different depositing materials have different effect on distortion, 20,21 and is noteworthy to consider this aspect while depositing different alloys having similar thermomechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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In-process monitoring of distortion and temperature in multi-layer laser cladding of Stellite 6 and Inconel 718 alloys

Thawari

Gullipalli

Katiyar

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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In laser cladding, the development of rapid heating and cooling cycles generates high residual stresses and thermal gradients that lead to induce unwanted distortion in the parts. The paper deals with online monitoring of temperatures and the associated distortions in multi-layer laser cladding using pyrometers and laser displacement sensors. The alloys deposited in the present work are Stellite 6 and Inconel 718, having similar thermo-mechanical properties. The results show that variation in thermal gradients due to rapid heating and cooling allows the material to expand and contract, generating substantial distortions. In the current investigations, Stellite 6 deposits generated 28%, 21%, 15% higher deflection at 12 mm/s, 16 mm/s, 20 mm/s scan speeds respectively; and 23%, 20%, 17% at 2400 W, 2900 W, 3400 W laser power compared to Inconel 718. Irrespective of the coating material, the second layer cladding induced 10% to 30% lower distortion than the first layer because of the reduction in temperature gradient. However, Inconel 718 clads measured 10% to 15% less melt pool temperatures than Stellite 6. The study reveals that different cladding materials deposited under similar process conditions have greater impact on distortion and temperature. At last, the investigations provide an optimum set of parameters to produce homogeneous cladding with moderate deflection and temperature for both the alloys.

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Section: Introductionmentioning

confidence: 99%

“…18 Whereas, Coherent Gradient Sensing (CGS) technique was used by Li et al to determine the deflection rates. 19…”

Section: Introductionmentioning

confidence: 99%

In-process monitoring of distortion and temperature in multi-layer laser cladding of Stellite 6 and Inconel 718 alloys

Thawari

Gullipalli

Katiyar

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

show abstract

Phase-Shifting Technique of Coherent Gradient Sensing Method for Residual Deformation Analysis of Repaired Components

Zhan-wei

Hou

et al. 2021

Exp Mech

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A review on non-destructive evaluation and characterization of additively manufactured components

Sreeraj

Mishra

Singh³

2021

Prog Addit Manuf

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In-situ monitoring of substrate deformation in directed energy deposition process using the coherent gradient sensing method

Cited by 5 publications

References 23 publications

In-process monitoring of distortion and temperature in multi-layer laser cladding of Stellite 6 and Inconel 718 alloys

In-process monitoring of distortion and temperature in multi-layer laser cladding of Stellite 6 and Inconel 718 alloys

Phase-Shifting Technique of Coherent Gradient Sensing Method for Residual Deformation Analysis of Repaired Components

A review on non-destructive evaluation and characterization of additively manufactured components

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