Numerical/experimental analysis of the laser surface hardening with overlapped tracks to design the configuration of the process for Cr-Mo steels

Cordovilla, Francisco; Beltrán, Ángel García; Sancho, Paula; Domínguez, J. Lindner; Ruiz-de-Lara, Leonardo; Ocaña, J.L.

doi:10.1016/j.matdes.2016.04.038

Cited by 58 publications

(16 citation statements)

References 23 publications

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“…Yang et al studied the residual stresses in a hard-faced steel specimen [26]. A literature survey about surfacing processes yields Cordovilla et al 's work dealing with laser surface hardening [27], El-Sayed, Shash, and Abd-Rabou's work on friction stir processing [28], and Zanger et al 's work dealing with a stream finishing process [29]. Ramesh prepared a review study on hard-facing [30].…”

Section: Introductionmentioning

confidence: 99%

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2021

brod

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Hard-facing process is widely used for improving the wear resistance of mild steel. During the application of hard-facing, due to high temperatures, residual stresses and deformations may occur. The tensile residual stresses may cause crack propagation on the hard-faced part. The purpose of this study is to utilise minimum computer work for minimizing these residual stresses and deformations during the hard-facing of mild steel. The fully coupled transient heat transfer and structural analysis was performed for calculations. The double-ellipsoidal moving heat source was utilised to simulate the heat input from the gas metal arc welding (GMAW). Only eight numerical simulations were performed to minimize the computer work; the grey relational analysis was used for minimizing both the residual stresses and deformations. Welding speed, welding current, and welding pattern were considered as changing parameters. At the end of the numerical and statistical solutions, it is observed that heat input should be kept minimum to minimize the stresses and deformations. But it is obvious that the heat input must provide a temperature greater than the melting point. Straight patterns always produce better results for minimizing stresses and deformations. Transverse stress at the beginning and end of the longitudinal path gets higher significantly after cooling. Cooling does not affect the total deformation.

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Section: Introductionmentioning

confidence: 99%

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2021

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“…Retained austenite is one of the most significant factors affecting the corrosion behavior of martensitic steels. Numerical and experimental analyses of the laser surface hardening with overlapped tracks to design the configuration of the process for AISI 410 were done by Cordovilla et al [8]. Badkar et al [9] worked on optimization for calculating the geometrical dimensions of the hardened area via response surface method and hardening 17 samples of titanium by solid-state Nd:YAG laser.…”

Section: -Introductionmentioning

confidence: 99%

Nd:YAG laser hardening of AISI 410 stainless steel: Microstructural evaluation, mechanical properties, and corrosion behavior

Moradi

Ghorbani

Moghadam

et al. 2019

Journal of Alloys and Compounds

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In this paper, a pulsed Nd:YAG laser with a maximum power of 700 W, was utilized to investigate the laser surface hardening of AISI 410 martensitic stainless steel. Focal point position, scanning speed and pulse width were considered as process variable parameters. Corrosion behavior of laser surface hardened samples were investigated by IVIUMSTAT apparatus in a 3.5wt% NaCl solution. Maximum microhardness, depth, and width of hardness and percentage of ferrite phase of metallographic and FESEM pictures were evaluated. Results show that surface hardness increased up to 762 HV. Results also reveal that the laser focal point position and pulse width are effective parameters in laser hardening process. In potentiodynamic polarization tests potential stated to increase at a rate of 1 mV/s from -0.4 V to 0.2 V. Results indicate that the corrosion resistance increased due to laser hardening process.

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“…The results showed that the microstructure including highly defected fine-plate martensite with a specified number of imperfectly dissolved cementite and a small amount of retained austenite phase was obtained when C80U steel was melted by optical discharge plasma. Cordovilla et al [16] simulated LSTH of AISI 4140 and compared the simulation results with experimental data. Guarino et al [17] improved the fatigue life of AISI 1040 steel by a high-power diode laser treatment.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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Laser surface transformation hardening (LSTH) of AISI 4130 was investigated by a Nd:YAG pulsed laser. Laser focal height (LFH), pulse width (LPW), scanning speed (LSS), and power (LP) varied during the experiments. The microstructure of the treated zone was characterized by optical (OM) and field emission scanning electron microscopy (FESEM). Micro-hardness was measured in the width and depth directions. Results showed that the hardness and depth of hardened layer increased by decreasing the LSS and the laser focal position (LFP), and by increasing the LPW. The results were compared with those obtained by furnace heat treatment of the same steel. Eventually, a finite element model was employed for the simulation of the LSTH of AISI 4130 steel and calculation of the heat-treated zone. The results showed that the model can predict with accuracy the temperature profile and the size and the shape of the laser hardened region.

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Numerical/experimental analysis of the laser surface hardening with overlapped tracks to design the configuration of the process for Cr-Mo steels

Cited by 58 publications

References 23 publications

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Nd:YAG laser hardening of AISI 410 stainless steel: Microstructural evaluation, mechanical properties, and corrosion behavior

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

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