A computer simulation study of the effects of temperature change rate on austenite kinetics in laser hardening

Bojinović, Marko; Mole, Nikolaj; Štok, Boris

doi:10.1016/j.surfcoat.2015.01.075

Cited by 34 publications

(29 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In ferrous material, the primary basic mechanism of surface hardening is by phase transformation to form the relatively hard martensitic phase in the surface layer. The advantages of LSH over conventional methods of hardening include its flexibility, ability to automate the hardening process, and contactless local heat treatment with no need for additional cooling media such as oil or water [29].…”

Section: Laser Surface Hardeningmentioning

confidence: 99%

Laser Surface Modification — A Focus on the Wear Degradation of Titanium Alloy

Adesina¹,

Popoola²,

Fatoba³

2016

Fiber Laser

View full text Add to dashboard Cite

Over the years, engineering materials are being developed due to the need for better service performance. Wear, a common phenomenon in applications requiring surface interaction, leads to catastrophic failure of materials in the industry. Hence, preventing this form of degradation requires the selection of an appropriate surface modification technique. Laser surface modification techniques have been established by researchers to improve mechanical and tribological properties of materials. In this chapter, adequate knowledge about laser surface cladding and its processing parameters coupled with the oxidation, wear and corrosion performances of laser-modified titanium has been reviewed.

show abstract

Section: Laser Surface Hardeningmentioning

confidence: 99%

Laser Surface Modification — A Focus on the Wear Degradation of Titanium Alloy

Adesina¹,

Popoola²,

Fatoba³

2016

Fiber Laser

View full text Add to dashboard Cite

show abstract

“…Bojinović et al (13) proposed a 3D model of the laser hardening process using a highpower diode laser for 50CrV4 steel, based on the finite element method. Nguyen and Yang (14) presented a sequential method to estimate surface absorptivity in the laser surface hardening process using a 1D transient conduction heat transfer model.…”

Section: Introductionmentioning

confidence: 99%

Tempering Effects of Multitrack Laser Surface Heat Treatment of AISI 1045 Steel

Kung¹,

Shih²,

Hsu³

et al. 2019

Sensors and Materials

View full text Add to dashboard Cite

A thermo-elastic-plastic finite element model was employed to simulate and analyze the effects of high-power parameters on the laser heat treatment of AISI 1045 steel. Tempering effects of multitrack laser heat treatment using various process parameters-laser power, laser feed rate, laser overlap rate, and laser spot size-were analyzed to estimate the distribution of a hardening layer on the steel surface. Numerical simulation results indicated that the proposed finite element model is effective in analyzing the laser heat treatment of the steel surface and calculating the possibility of decreases in steel hardness due to tempering effects, enabling it to undergo rapid temperature increases and decreases.

show abstract

“…To achieve a good performance in heat treatment, it is necessary to control the case depth generated by the heat flux transmitted by conduction through the outer surface of the workpiece [4] [5]. Several research stu- propriate [10]. For a determination of the temperature distribution in a material, the finite element method (FEM) can be used to solve numerically the partial differential equations of heat flux in a defined domain and with boundary conditions of Dirichlet, Neumann or Robin [11].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation by the Finite Difference Method of the Laser Hardening Process Applied to AISI-4340

Fakir¹,

Barka²,

Brousseau³

et al. 2018

JAMP

View full text Add to dashboard Cite

This paper presents a numerical and experimental analysis study of the temperature distribution in a cylindrical specimen heat treated by laser and quenched in ambient temperature. The cylinder studied is made of AISI-4340 steel and has a diameter of 14.5-mm and a length of 50-mm. The temperature distribution is discretized by using a three-dimensional numerical finite difference method. The temperature gradient of the transformation of the microstructure is generated by a laser source Nd-YAG 3.0-kW manipulated using a robotic arm programmed to control the movements of the laser source in space and in time. The experimental measurement of surface temperature and air temperature in the vicinity of the specimen allows us to determine the values of the absorption coefficient and the coefficient of heat transfer by convection, which are essential data for a precise numerical prediction of the case depth. Despite an unsteady dynamic regime at the level of convective and radiation heat losses, the analysis of the averaged results of the temperature sensors shows a consistency with the results of microhardness measurements. The feasibility and effectiveness of the proposed approach lead to an accurate and reliable mathematical model able to predict the temperature distribution in a cylindrical workpiece heat treated by laser.

show abstract

A computer simulation study of the effects of temperature change rate on austenite kinetics in laser hardening

Cited by 34 publications

References 24 publications

Laser Surface Modification — A Focus on the Wear Degradation of Titanium Alloy

Laser Surface Modification — A Focus on the Wear Degradation of Titanium Alloy

Tempering Effects of Multitrack Laser Surface Heat Treatment of AISI 1045 Steel

Numerical Investigation by the Finite Difference Method of the Laser Hardening Process Applied to AISI-4340

Contact Info

Product

Resources

About