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Micromachines
Volume 12
Issue 2
10.3390/mi12020225
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Article

Numerical Simulation on Pulsed Laser Ablation of the Single-Crystal Superalloy Considering Material Moving Front and Effect of Comprehensive Heat Dissipation

by
Bin Wang
1,2,
Yihui Huang
1,*,
Junke Jiao
1,
Hao Wang
3,
Ji Wang
1,
Wenwu Zhang
1 and
Liyuan Sheng
4,*
1
Institute of Advanced Manufacturing Technology, Ningbo Institute of Materials Technology and Engineering, University of Chinese Academy of Sciences, Ningbo 315201, China
2
College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
3
Chair of Applied Laser Technologies, Ruhr-Universität Bochum, 44801 Bochum, Germany
4
Labortary of Advanced Materials and Processing, PKU-HKUST ShenZhen-HongKong Institution, Shenzhen 518057, China
*
Authors to whom correspondence should be addressed.
Micromachines 2021, 12(2), 225; https://doi.org/10.3390/mi12020225
Submission received: 18 January 2021 / Revised: 16 February 2021 / Accepted: 20 February 2021 / Published: 23 February 2021
(This article belongs to the Special Issue Laser Micromachining)
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Abstract

In the present research, an iterative numerical model is proposed to investigate the nanosecond pulsed laser ablation (PLA) mechanism of the DD6 single-crystal superalloy. In the numerical model, two subroutines are introduced to trace the moving boundary and update the thermal load. The iteration between the main governing equation and the two subroutines enables the PLA numerical simulation to consider material moving front and effect of comprehensive heat dissipation including thermal convection and radiation. The basic experimental results exhibit a good agreement with simulation results which indicates the good accuracy of the simulation model. Therefore, the PLA mechanism of the DD6 single-crystal superalloy is studied base on the improved iterative model, which indicates the evolution of temperature field, ablation zone morphology, formation of recast layer and heat-affected zone are closely related with time. The temperature of the laser spot center increases sharply at the first stage, reaching a maximum value of 5252 K, and then decreases gradually. The thermal dissipation postpones the ablation rate but promotes the formation of a recast layer and heat-affected zone. Due to the evaporation and thermal dissipation, the depth of the molten layer exhibits two rapid increasing stages. The comprehensive analysis of the PLA processing by the improved simulation model helps the understanding of the intrinsic mechanism, which would contribute to the further optimizing parameters of PLA fabrication of the DD6 single-crystal superalloy.
Keywords: pulsed laser ablation; numerical simulation; material moving front; heat dissipation; DD6 single-crystal superalloy pulsed laser ablation; numerical simulation; material moving front; heat dissipation; DD6 single-crystal superalloy

Share and Cite

MDPI and ACS Style

Wang, B.; Huang, Y.; Jiao, J.; Wang, H.; Wang, J.; Zhang, W.; Sheng, L. Numerical Simulation on Pulsed Laser Ablation of the Single-Crystal Superalloy Considering Material Moving Front and Effect of Comprehensive Heat Dissipation. Micromachines 2021, 12, 225. https://doi.org/10.3390/mi12020225

AMA Style

Wang B, Huang Y, Jiao J, Wang H, Wang J, Zhang W, Sheng L. Numerical Simulation on Pulsed Laser Ablation of the Single-Crystal Superalloy Considering Material Moving Front and Effect of Comprehensive Heat Dissipation. Micromachines. 2021; 12(2):225. https://doi.org/10.3390/mi12020225

Chicago/Turabian Style

Wang, Bin, Yihui Huang, Junke Jiao, Hao Wang, Ji Wang, Wenwu Zhang, and Liyuan Sheng. 2021. "Numerical Simulation on Pulsed Laser Ablation of the Single-Crystal Superalloy Considering Material Moving Front and Effect of Comprehensive Heat Dissipation" Micromachines 12, no. 2: 225. https://doi.org/10.3390/mi12020225

APA Style

Wang, B., Huang, Y., Jiao, J., Wang, H., Wang, J., Zhang, W., & Sheng, L. (2021). Numerical Simulation on Pulsed Laser Ablation of the Single-Crystal Superalloy Considering Material Moving Front and Effect of Comprehensive Heat Dissipation. Micromachines, 12(2), 225. https://doi.org/10.3390/mi12020225

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