Femtosecond Laser Ablation Kinetic Energy Thermal Model and Tooth Surface Topography of Face Gear Materials

Yongbo Xiao; Rui Ming; Mingtao Lai; Xuekun Li; Yulong Ma; Xingzu Ming

doi:10.3788/LOP202158.1714001

Journals >Laser & Optoelectronics Progress >Volume 58 >Issue 17 >Page 1714001 > Article

Laser & Optoelectronics Progress
Vol. 58, Issue 17, 1714001 (2021)

Femtosecond Laser Ablation Kinetic Energy Thermal Model and Tooth Surface Topography of Face Gear Materials

Yongbo Xiao¹, Rui Ming^1、*, Mingtao Lai¹, Xuekun Li¹, Yulong Ma², and Xingzu Ming^1、2、**

Author Affiliations

¹School of Mechanical Engineering, Hunan University of Technology, Zhuzhou , Hunan 412007, China

²School of Mechanical Engineering, Hubei University of Arts and Science, Xianyang , Hubei 441053, China

show less

DOI: 10.3788/LOP202158.1714001 Cite this Article Set citation alerts

Yongbo Xiao, Rui Ming, Mingtao Lai, Xuekun Li, Yulong Ma, Xingzu Ming. Femtosecond Laser Ablation Kinetic Energy Thermal Model and Tooth Surface Topography of Face Gear Materials[J]. Laser & Optoelectronics Progress, 2021, 58(17): 1714001 Copy Citation Text

show less

Fig. 1. Energy transfer process from femtosecond laser source to crystal lattice

Download full size

Fig. 2. Geometric model and meshing.（a）Size shape；（b）meshing

Download full size

Fig. 3. Variation of the electron and lattice temperatures of the tooth surface for a duration of 30 ps

Download full size

Fig. 4. Lattice temperature distribution of the tooth surface along the axial and radial directions. (a) Axial direction; (b) radial direction

Download full size

Fig. 5. Profile and temperature distribution of tooth ablation pit at different laser energy densities.（a）1.04 J·cm^-2；（b）5.25 J·cm^-2

Download full size

Fig. 6. Femtosecond laser processing system

Download full size

Fig. 7. SEM images of ablated crater at different laser energy densities.（a）1.04 J·cm^-2；（b）5.25 J·cm^-2

Download full size

Fig. 8. Three-dimensional ultra depth of field microscope images of ablated crater at different laser energy densities.（a）1.04 J·cm^-2；（b）5.25 J·cm^-2

Download full size

Fig. 9. Comparison of the pit diameter and ablation depth of the axisymmetric model with the experimental values at different laser energy densities.（a）1.04 J·cm^-2；（b）5.25 J·cm^-2

Download full size

Element	C	Cr	Ni
Mass fraction /%	0.18	1.5	4.25
Absorption rate	0.833	0.361	0.284

Table 1. Chemical composition of gear material 18Cr2Ni4WA

Parameter	Value	Parameter	Value
Thermal conductivity of electrons $k_{e}$ /（W·m^-1·K^-1）	78.4	Density $ρ$ /（kg·m^-3）	7800
Electron heat capacity $C_{e}$ /（J·m^-3·K^-1）	706.4	Fermi temperature $T_{F}$ /K	1.28×10⁵
Lattice heat capacity $C_{l}$ /（J·m^-3·K^-1）	3.6×10⁶	Melting temperature $T_{m}$ /K	1724
Coupling coefficient $g$ /（W·m^-3·K^-1）	130×10¹⁶	Heat of evaporation Ω_vap /（J·g^-1）	6288
Absorption coefficient $α_{b}$ /m^-1	4.97×10⁷	Vaporization temperature $T_{v}$ /K	3023
Reflectivity $R$	0.64

Table 2. Material characteristics

Parameter	Value	Parameter	Value
Laser spot radius $r_{0}$ /μm	20	Peak laser power $P_{l a s e r}$ /W	4×10⁹
Laser fluence $I_{0}$ /（J·cm^-2）	1.04~5.25	Pulse width $τ_{p}$ /fs	800
Average power $P_{a v e}$ /W	7	Wavelength λ /nm	1030

Table 3. Laser parameters

Laser powerP /W	Laser energyF /μJ	Laser fluenceI₀ /（J·cm^-2）	Ablation diameter D /μm		Ablation depth H /μm
Laser powerP /W	Laser energyF /μJ	Laser fluenceI₀ /（J·cm^-2）	Predictive value	Experimental value	Predictive value	Experimental value
1.3	13	1.04	46.52	44.581	3.28	3.147
2.2	22	1.75	51.08	50.027	3.98	4.461
4.9	49	3.90	63.86	63.001	4.98	4.228
5.8	58	4.62	67.1	67.564	5.12	5.306
6.6	66	5.25	68.02	69.041	5.17	6.425

Table 4. Predicted and experimental values of different parameters for gear material 18Cr2Ni4WA

Download Citation

Set citation alerts for the article

Tools

Set citation alerts for the article

Save the article for my favorites

Paper Information