Porosity elimination and heat treatment of diode laser-clad homogeneous coating on cast aluminum-copper alloy

Yang, Zhixiang; Wang, Aihua; Weng, Zhikun; Xiong, Dahui; Yao, Bin; Qi, Xiaoyong

doi:10.1016/j.surfcoat.2017.04.027

Cited by 41 publications

(10 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, less energy is absorbed when the cladding layer is stacked onto the substrate, and the duration of the molten pool becomes shorter. Meanwhile, too much powder enters the pool with the increase of air flow, worsening the fluidity of molten pool, which causes an increase to the pore area [ 32 ]. When the scanning speed and overlapping rate increase simultaneously, the surface of the cladding layer becomes uneven because of the higher overlapping rate.…”

Section: Resultsmentioning

confidence: 99%

Analysis and Respond Surface Methodology Modeling on Property and Performance of Two-Dimensional Gradient Material Laser Cladding on Die-cutting Tool

et al. 2018

View full text Add to dashboard Cite

Die-cutting tools have been widely applied in industrial production. However, different forms of failure on a blade, such as wear and fracture, can greatly reduce its service life. In this research, the die-cutting tool was selected as the object, a mixture of high speed steel powder and 304 stainless steel powder was coated as a gradient cladding layer onto the surface of AISI/SAE 1045 steel by laser cladding. The central composition design of the response surface methodology was adopted to establish a mathematical model between the pore area of the multi-layer, multi-track cladding, and its processing parameters: Laser Power (LP), Scanning Speed (SS), Gas Flow (GF), and Overlapping Rate (OR). This model was validated by variance analysis and inspection indicators. The actual experiment value by processing parameters optimization for achieving the smallest pore area showed a 4.41% error compared with the predicted value. The internal structure of the cladding layer is uniform. The defects, such as pores and cracks, meet the requirements. The wear resistance on the cutting edge is about 4.5 times compared with the substrate. The results provide a theoretical guidance for the controlling and prediction of the laser cladding forming quality on a two-dimensional gradient material and the optimization of the processing parameters.

show abstract

Section: Resultsmentioning

confidence: 99%

Analysis and Respond Surface Methodology Modeling on Property and Performance of Two-Dimensional Gradient Material Laser Cladding on Die-cutting Tool

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Due to the action of van der Waals force [78], small pores merge to larger pores within the molten pool (figure 9(b)). Furthermore, surface tension obstructs pore detachment during the floating process [79], preventing pores from escaping from the molten pool and consequently leading to defect formation in the cladding layer. However, with the assistance of electromagnetic compound field, current will circulate around the pores due to the good conductivity of the surrounding metal fluid.…”

Section: Electromagnetic Field Assisted Am Technologymentioning

confidence: 99%

Performance-control-orientated hybrid metal additive manufacturing technologies: state of the art, challenges, and future trends

Lv,

Liang,

et al. 2024

Int. J. Extrem. Manuf.

View full text Add to dashboard Cite

Metal additive manufacturing (AM) technologies have made significant progress in the basic theoretical field since their invention in the 1970s. However, performance instability during continuous processing, such as thermal history, residual stress accumulation, and columnar grain epitaxial growth, consistently hinders their broad application in standardized industrial production. To overcome these challenges, performance-control-oriented hybrid AM (HAM) technologies have been introduced. These technologies, by leveraging external auxiliary processes, aim to regulate microstructural evolution and mechanical properties during metal AM. In this context, HAM technologies for molten pool regulation and solidified material deformation are identified as energy field-assisted AM (EFed AM, e.g., ultrasonic, electromagnetic, heat, etc.) technologies and interlayer plastic deformation-assisted AM (IPDed AM, e.g., laser shock peening, rolling, ultrasonic peening, friction stir process, etc.) technologies, respectively. A detailed and systematic review of performance-control-oriented HAM technologies is then provided. This review covers the influence of external energy fields on the melting, flow, and solidification behavior of materials, and the regulatory effects of interlayer plastic deformation on grain refinement, nucleation, and recrystallization. Furthermore, the role of performance-control-oriented HAM technologies in managing residual stress conversion, metallurgical defect closure, mechanical property improvement, and anisotropy regulation is thoroughly reviewed and discussed. The review concludes with an analysis of future development trends in EFed AM and IPDed AM technologies.

show abstract

“…Durandet et al [ 14 ] investigated how to minimize the formation of porosity in the laser cladding. Yang et al [ 15 ] observed two types of hydrogen porosities in laser cladding: one is chain-shaped porosities generated along the bottom of the molten pool, and the other is larger porosities with a diameter greater than 100 μm dispersedly distributed in the coating. By changing the laser power and powder feed rate, larger holes can be eliminated entirely.…”

Section: Introductionmentioning

confidence: 99%

“…The laser cladding process has the characteristics of rapid cold and rapid heat, and the opacity of metal materials largely limits the real-time observation of the evolution between porosities and dendrites. The experiment is mainly X-ray and post-solidification observation during the solidification process [ 14 , 15 , 16 , 17 ]. In addition, the melt pool complex physical, including hydrodynamics and heat dissipation phenomenon, has not been fully understood.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Microporosity Formation of IN718 Alloy during Laser Cladding Based on Cellular Automaton

et al. 2021

Materials

View full text Add to dashboard Cite

Porosity is one of the most common defects in the laser cladding of Inconel 718 (IN718) alloy, which can reduce the strength and fatigue performance of the components. However, the dynamic formation of microporosity is challenging to observe through experiments directly. In order to explore the formation mechanism of porosities and dynamically reproduce the competitive growth between porosities and dendrite, a multi-scale numerical model was adopted, combined with a cellular automaton (CA) and finite element method (FEM). The decentered square algorithm was adopted to eliminate crystallographic anisotropy and simulate dendrite growth in different orientations. Afterward, based on the formation mechanism of microporosity during solidification, equiaxed and columnar dendrites with porosities were simulated, respectively. Dendrite morphology, porosity morphology, and distribution of solute concentration were obtained during the solidification process. The simulation results were reasonably compared with experimental data. The simulation results of the equiaxed crystal region are close to the experimental data, but the columnar crystal region has a relative error. Finally, the interaction effects of porosities and dendrites under different environmental conditions were discussed. The results suggested that with the increase in the cooling rate, the quantity of porosity nucleation increased and the porosity decreased.

show abstract

Porosity elimination and heat treatment of diode laser-clad homogeneous coating on cast aluminum-copper alloy

Cited by 41 publications

References 30 publications

Analysis and Respond Surface Methodology Modeling on Property and Performance of Two-Dimensional Gradient Material Laser Cladding on Die-cutting Tool

Analysis and Respond Surface Methodology Modeling on Property and Performance of Two-Dimensional Gradient Material Laser Cladding on Die-cutting Tool

Performance-control-orientated hybrid metal additive manufacturing technologies: state of the art, challenges, and future trends

Investigation on the Microporosity Formation of IN718 Alloy during Laser Cladding Based on Cellular Automaton

Contact Info

Product

Resources

About