Experimental and Numerical Study of AISI 4130 Steel Surface Hardening by Pulsed Nd:YAG Laser

Casalino, Giuseppe; Moradi, Mahmoud; Moghadam, Mojtaba Karami; Khorram, Ali; Perulli, Patrizia

doi:10.3390/ma12193136

Cited by 35 publications

(12 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…describes the amount of heat input based on the scanning speed and the power of the laser[51]:Heat input(J) = Laser power (W)/Scanning Speed (mm/s)…”

mentioning

confidence: 99%

Post-Processing of FDM 3D-Printed Polylactic Acid Parts by Laser Beam Cutting

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this paper, the post-processing of 3D-printed poly lactic acid (PLA) parts is investigated. Workpieces are manufactured by fused deposition modeling (FDM) 3D printing, while they may have defects in some areas such as edges. A post-processing is introduced here for 3D-printed samples by low power CO2 laser. The thickness of the FDM samples are 3.2 mm and printed by optimum conditions. Effects of process parameters such as focal plane position (−3.2–3.2 mm), laser power (20–40 W), and laser cutting speed (1–13 mm/s) are examined based on the design of experiments (DOE). Geometrical features of the kerf; top and bottom kerf; taper; ratio of top to the bottom kerf are considered as output responses. An analysis of the experimental results by statistical software is conducted to survey the effects of process parameters and to obtain regression equations. By optimizing of the laser cutting process; an appropriate kerf quality is obtained and also optimum input parameters are suggested. Experimental verification tests show a good agreement between empirical results and statistical predictions. The best optimum sample with 1.19 mm/s cutting speed, 36.49 W power and 0.53 mm focal plane position shows excellent physical features after the laser cutting process when 276.9 μm top and 261.5 μm bottom kerf width is cut by laser.

show abstract

“…describes the amount of heat input based on the scanning speed and the power of the laser[51]:Heat input(J) = Laser power (W)/Scanning Speed (mm/s)…”

mentioning

confidence: 99%

Post-Processing of FDM 3D-Printed Polylactic Acid Parts by Laser Beam Cutting

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…These actually illustrate the temperature field, in this way showing the temperature distribution in the heat-affected zone. Studies of the thermal state of the surface layers of materials subjected to laser irradiation can be found in [33][34][35][36]. They show that the characteristics of the temperature field in materials (the value and gradient of temperatures, heating and cooling rates) are greatly influenced by beam parameters, the movement speed of the heat source, the power density distribution of the beam, thermal and physical characteristics, and the size of the processed objects.…”

Section: Optical Systems For the Shaping Of Laser Beamsmentioning

confidence: 99%

Analysis of the Advantages of Laser Processing of Aerospace Materials Using Diffractive Optics

Murzin

Kazanskiy

Stiglbrunner

2021

Metals

View full text Add to dashboard Cite

We considered possibilities of an application of diffractive free-form optics in laser processing of metallic materials in aerospace production. Based on the solution of the inverse problem of heat conduction, an algorithm was developed that calculates the spatial distribution of the power density of laser irradiation in order to create the required thermal effect in materials. It was found that the use of diffractive optics for the laser beam shaping made it possible to obtain specified properties of processed materials. Laser thermal hardening of parts made of chrome–nickel–molybdenum steel was performed. This allowed us to increase the wear resistance due to the creation in the surface layer of a structure that has an increased hardness. In addition, a method of laser annealing of sheet materials from aluminum–magnesium alloy and low-alloy titanium alloys was developed. Application of this method has opened opportunities for expanding the forming options of these materials and for improving the precision in the manufacturing of aircraft engine parts. It was also shown that welding by a pulsed laser beam with a redistribution of power and energy density makes it possible to increase the strength of the welded joint of a heat-resistant nickel-based superalloy. Increasing the adhesion strength of gas turbine engine parts became possible by laser treatment using diffractive free-form optics.

show abstract

“…Finally, he proposed the optimal combination of process parameters for laser quenching of high-phosphorus cast iron. Casalino et al [12] optimized the laser power, scanning speed and focal plane position during the laser quenching process of AISI4130 based on the response surface analysis, and established a finite element model of the laser quenching process, and studied the temperature distribution and size shape of laser hardening zone. Volpp et al [13] studied the influence of complex geometry on laser surface hardening, and the study showed that complex geometry does not affect the microstructure evolution process.…”

Section: Introductionmentioning

confidence: 99%

Simulation and experimental study of GGG70L laser quenching

Ding

Guan

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

GGG70L is a kind of cold-working die steel widely used in large automobile cover parts die. In order to ensure the life of the die, laser quenching process is usually used to form a certain hardened layer at a specific part of the die. In this paper, the changes of microstructure and hardness of ductile iron GGG70L after laser quenching were studied through a large number of process experiments, and the influence of quenching process parameters on the microstructure and properties of GGG70L was obtained. The relationship between the depth of hardened layer and the laser energy density is established and a quadratic function relationship was found between the two. It is found that both higher hardness and deeper hardening depth can be obtained when the energy density is 24-28 (J/mm2). The finite element model of the laser quenching process of GGG70L was established, and the temperature of the hardened zone and its evolution law during the laser quenching process were studied numerically.

show abstract

Experimental and Numerical Study of AISI 4130 Steel Surface Hardening by Pulsed Nd:YAG Laser

Cited by 35 publications

References 40 publications

Post-Processing of FDM 3D-Printed Polylactic Acid Parts by Laser Beam Cutting

Post-Processing of FDM 3D-Printed Polylactic Acid Parts by Laser Beam Cutting

Analysis of the Advantages of Laser Processing of Aerospace Materials Using Diffractive Optics

Simulation and experimental study of GGG70L laser quenching

Contact Info

Product

Resources

About