4.7 Article

Numerical study on multiphase evolution and molten pool dynamics of underwater wet laser welding in shallow water environment

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Optics

High-accuracy calibration method for an underwater one-mirror galvanometric laser scanner

Xiao Li et al.

Summary: This paper proposes a high-accuracy calibration method that considers refraction and is independent of installation errors for the vision system in underwater measurement. By introducing a high-accuracy land-based installation-error-independent model and a partition-based method, the calibration accuracy of the laser scanner in underwater measurement scenarios can be improved. Experimental results demonstrate that the proposed land-based installation-error-independent model achieves a calibration accuracy 2 times higher than the traditional installation-error-dependent model.

OPTICS EXPRESS (2023)

Article Thermodynamics

Dynamic vapor and keyhole behavior, and equiaxed dendrite formation in blue laser processing of copper

Dongsheng Wu et al.

Summary: By developing a coupled Cu vapor and keyhole numerical model with virtual mesh refinement, the vapor and keyhole behavior in blue laser processing of copper material was investigated. EBSD was used to measure the crystal structure of the fusion zone. Cu vapor mainly flowed upwards above the keyhole, while some downward flows were observed inside the keyhole. The melt at the keyhole wall flowed downwards due to recoil force and Marangoni stress, and the melt at the pool edge flowed outwards due to Marangoni stress.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2023)

Article Metallurgy & Metallurgical Engineering

Finite Element Analysis of Underwater Wet Welding: The Implementation of Bubble Configuration

Jianfeng Wang et al.

Summary: A three-dimensional numerical model was developed to characterize the features of underwater wet welding, particularly the bubble effect caused by high heat concentration. A semi empirical method was incorporated into the model to account for the heat loss mechanism. The model demonstrated improved prediction accuracy and agreement with experimental results by considering the bubble configuration. The influence of the bubble's equivalent contact radius and floating frequency on temperature field evolution was evaluated, revealing their impact on heat losses, weld profile, and joint penetration.

WELDING JOURNAL (2023)

Article Chemistry, Physical

Enhancing the Marangoni flow by inner side chain engineering in nonfullerene acceptors for reproducible blade coating-processed organic solar cell manufacturing

Geunhyung Park et al.

Summary: This study investigates the relationship between convective flows and the inner side chain lengths in blade coating-processed organic solar cell (OSC) fabrication. By analyzing the device performance in nine different regions on a blade-coated substrate, it is found that the L8-i-EB-based device with a shorter inner side chain exhibits higher reproducibility due to its superior film uniformity induced by the enhanced inward-directional Marangoni flow. This study highlights the importance of the Marangoni flow effect in realizing reproducible blade coating-processed OSCs.

JOURNAL OF MATERIALS CHEMISTRY A (2023)

Review Engineering, Mechanical

Underwater Laser Welding/Cladding for High-performance Repair of Marine Metal Materials: A Review

Guifang Sun et al.

Summary: This review article examines the underwater laser welding/cladding technique, discussing recent advancements and key issues, as well as the microstructural-mechanical behavior of repaired marine materials. It also reviews the powder-feeding based and wire-feeding based underwater laser direct metal deposition techniques. The differences between underwater laser direct metal deposition and in-air laser direct metal deposition are illustrated, and future challenges and directions for underwater laser welding/cladding technology are proposed.

CHINESE JOURNAL OF MECHANICAL ENGINEERING (2022)

Article Engineering, Marine

Underwater wet welding of S1300 ultra-high strength steel

Jacek Tomkow et al.

Summary: The study examined the possibility of underwater wet welding with different thicknesses of S1300 ultra-high strength steel using visual, metallographic, macro- and microscopic tests, as well as Vickers HV10 measurements. Quantitative verification of the effectiveness of the TBW technique was conducted, demonstrating positive microstructural changes and a reduction in crack formation in welded joints. Additionally, the proposed technique was found to decrease the hardness of S1300 steel joints, regardless of base material thickness.

MARINE STRUCTURES (2022)

Article Engineering, Manufacturing

Ablation mechanism in underwater drilling by an ultrafast laser with pulse energy below the water breakdown threshold

Changlong Zheng et al.

Summary: An underwater percussion drilling process using an ultrafast laser with pulse energy below the water breakdown threshold was investigated to reduce heat accumulation during drilling. The effects of laser-induced plasma on energy attenuation and beam refraction were quantitatively described using a numerical model. The model can predict hole radius and depth in underwater drilling and explain differences in drilling performance in air and underwater.

JOURNAL OF MANUFACTURING PROCESSES (2022)

Article Multidisciplinary Sciences

Controlling process instability for defect lean metal additive manufacturing

Minglei Qu et al.

Summary: This study demonstrates the control of process instabilities in metal additive manufacturing using nanoparticles, leading to defect lean 3D printed samples with enhanced properties.

NATURE COMMUNICATIONS (2022)

Article Engineering, Multidisciplinary

Measurement of pulsed laser welding penetration based on keyhole dynamics and deep learning approach

Sikai Liu et al.

Summary: This study established an active visual monitoring system to investigate the dynamic behavior of keyholes in pulsed laser welding, and parameters quantifying the keyhole formation dynamics were extracted using image processing and process analysis methods. Additionally, a data-driven deep learning model was constructed to identify different penetration states. Experimental results show that this approach has the potential to guide real-time control of the pulsed laser welding process.

MEASUREMENT (2022)

Article Automation & Control Systems

Modeling of heat transfer, fluid flow, and weld pool dynamics during keyhole laser welding of 316 LN stainless steel using hybrid conical-cylindrical heat source

Anoop Karaniath Unni et al.

Summary: This study investigates the heat transfer, molten fluid flow weld pool dynamics, and cooling rate phenomena in the laser weld pool of 316 LN stainless steel using a three-dimensional numerical modeling approach. The study employs a hybrid conical-cylindrical heat source model to simulate the laser energy transmission and predicts the penetration depth for an optimized laser energy input. The simulation results are in good agreement with experimental data and provide insight into the thermal-fluid flow mechanism and weld fusion zone attributes.

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY (2022)

Article Automation & Control Systems

Effect of pulse current on droplet transfer behavior and weld formation of 304 stainless steel in local dry underwater pulse MIG welding

Haipeng Liao et al.

Summary: In this study, 304 stainless steel was welded using LDU-PMIG welding technology, and the effect of different pulse peak currents on weld formation was investigated. The results show that higher peak currents can improve the quality of weld formation, but excessive peak currents can cause welding instability and poor weld formation.

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY (2022)

Article Engineering, Industrial

Simultaneously enhanced strength-ductility synergy and corrosion resistance in submerged friction stir welded super duplex stainless steel joint via creating ultrafine microstructure

Fujun Cao et al.

Summary: This paper investigates the application of submerged friction stir welding (SFSW) on SAF2507 super duplex stainless steel (SDSS). The results show that SFSW can achieve an ultrafine grained (UFG) dual-phase microstructure, leading to enhanced strength, elongation, and corrosion resistance in the weld joint.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2022)

Article Materials Science, Multidisciplinary

Numerical simulation and experimental verification of droplet transfer during local dry underwater MIG welding process of SUS304

Haipeng Liao et al.

Summary: Based on fluid mechanics and electromagnetic theory, a numerical simulation model was developed to investigate the droplet transfer process in local dry underwater MIG welding (LDU-MIG) of SUS304. The effects of gas pressure, wire feeding speed, and pulse peak current on the transfer process were simulated and analyzed. The simulation results were in good agreement with experimental results, validating the accuracy and feasibility of the simulation model.

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T (2022)

Article Optics

Modeling and numerical study of keyhole-induced porosity formation in laser beam oscillating welding of 5A06 aluminum alloy

Wenchao Ke et al.

Summary: This paper presents a numerical framework and methods to suppress porosity formation in laser beam oscillating welding. The study found that porosity decreased and was fully inhibited when using an infinity-oscillating path with a frequency of 200 Hz. The developed multi-physics model aids in understanding keyhole-induced porosity formation during laser beam oscillating welding of 5A06 aluminum alloy.

OPTICS AND LASER TECHNOLOGY (2021)

Article Materials Science, Multidisciplinary

Influence of Cooling Rates on the Microstructure and Mechanical Properties of Aluminum Titanate Flexible Ceramic

Jiawei Lian et al.

Summary: In this study, aluminum titanate (AT) flexible ceramics with different cooling rates were fabricated and investigated. The cooling rate was found to affect the microstructures and mechanical properties of AT ceramics, with higher rates leading to increased microcrack width and density, resulting in improved flexibility but reduced strength. Among the cooling methods tested, air cooling produced AT ceramics with the best bending strain, moderate microcrack width, and density.

ADVANCED ENGINEERING MATERIALS (2021)

Review Thermodynamics

Buoyancy-driven flows beyond the Boussinesq approximation: A brief review

Peyman Mayeli et al.

Summary: This review paper discusses various methods for numerical simulation of laminar natural convection, including Boussinesq and nonBoussinesq approximations, classified into compressible and incompressible categories.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

Article Optics

An investigation on physical phenomena of water-jet assisted underwater wet laser welding technique under continuous and pulsed mode operation

Parag Malhari Sakate et al.

Summary: This study introduces a novel underwater wet laser welding technique that enhances water vapor removal by introducing a water jet parallel to the weld pool surface, resulting in higher energy coupling efficiency. It was found that pulsed laser operation produces deeper welds and better energy coupling compared to continuous mode. Additionally, microstructural analysis showed finer grains and precipitation in underwater welding, indicating enhanced cooling effects in this technique.
Article Engineering, Industrial

Microstructure and properties of underwater laser welding of TC4 titanium alloy

Yunlong Fu et al.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2020)

Article Thermodynamics

Physical understanding of keyhole and weld pool dynamics in laser welding under different water pressures

Manlelan Luo et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2019)

Article Engineering, Industrial

Underwater local dry cavity laser welding of 304 stainless steel

Ning Guo et al.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2018)

Article Engineering, Industrial

Numerical study of keyhole instability and porosity formation mechanism in laser welding of aluminum alloy and steel

Lijin Huang et al.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2018)

Article Automation & Control Systems

Role of ambient pressure in keyhole dynamics based on beam transmission path method for laser welding on Al alloy

Xiaoxiao Han et al.

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY (2018)

Article Thermodynamics

Numerical study of keyhole dynamics and keyhole-induced porosity formation in remote laser welding of Al alloys

Runqi Lin et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2017)

Article Materials Science, Multidisciplinary

Effect of water depth on weld quality and welding process in underwater fiber laser welding

Ning Guo et al.

MATERIALS & DESIGN (2017)

Article Materials Science, Multidisciplinary

Pitting corrosion of sensitised type 304 stainless steel under wet-dry cycling condition

Cong-Qian Cheng et al.

CORROSION SCIENCE (2017)

Article Materials Science, Multidisciplinary

On the role of melt flow into the surface structure and porosity development during selective laser melting

Chunlei Qiu et al.

ACTA MATERIALIA (2015)

Article Materials Science, Multidisciplinary

Explanation of penetration depth variation during laser welding under variable ambient pressure

Shengyong Pang et al.

JOURNAL OF LASER APPLICATIONS (2015)

Article Thermodynamics

Modeling and simulation on long pulse laser drilling processing

Yiming Zhang et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2014)

Article Thermodynamics

An improved simulation of heat transfer and fluid flow in plasma arc welding with modified heat source model

Yan Li et al.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2013)

Article Engineering, Industrial

Numerical simulation of molten pool dynamics in high power disk laser welding

Won-Ik Cho et al.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2012)

Article Physics, Applied

Weld pool flows during initial stages of keyhole formation in laser welding

Jung-Ho Cho et al.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2009)

Article Thermodynamics

Effects of electromagnetic force on melt flow and porosity prevention in pulsed laser keyhole welding

Jun Zhou et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2007)

Article Physics, Applied

Implementation of real-time multiple reflection and Fresnel absorption of laser beam in keyhole

Jung-Ho Cho et al.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2006)

Article Physics, Applied

Mechanism of keyhole formation and stability in stationary laser welding

JY Lee et al.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2002)

Article Materials Science, Multidisciplinary

Marangoni effect in laser deep penetration welding of steel

T Fuhrich et al.

JOURNAL OF LASER APPLICATIONS (2001)