MULTISCALE INVESTIGATION OF THICKNESS DEPENDENT MELTING THRESHOLDS OF NICKEL FILM UNDER FEMTOSECOND LASER HEATING

Ji, Pengfei1; He, Mengzhe1; Rong, Yiming1; Zhang, Yuwen2; Tang, Yong3

10.1115/IMECE2018-86947

2019

ASMEInternational Mechanical Engineering Congress and Exposition (IMECE2018)

PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, 2018, VOL 8A

8A-2018

NOV 09-15, 2018

Pittsburgh, PA, United states

THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA

AMER SOC MECHANICAL ENGINEERS

A multiscale modeling that integrates electronic scale ab initio quantum mechanical calculation, atomic scale molecular dynamics simulation, and continuum scale two-temperature model description of the femtosecond laser processing of nickel film at different thicknesses is carried out in this paper. The electron thermophysical parameters (heat capacity, thermal conductivity, and electron-phonon coupling factor) are calculated from first principles modeling, which are further substituted into molecular dynamics and two-temperature model coupled energy equations of electrons and phonons. The melting thresholds for nickel films of different thicknesses are determined from multiscale simulation. Excellent agreement between results from simulation and experiment is achieved, which demonstrates the validity of modeled multiscale framework and its promising potential to predict more complicate cases of femtosecond laser material processing. When it comes to process nickel film via femtosecond laser, the quantitatively calculated maximum thermal diffusion length provides helpful information on choosing the film thickness.

Femtosecond Laser Multiscale Modeling Melting

第一 ; 通讯

英语

CPCI-S ; EI

Southern University of Science and Technology Presidential Postdoctoral Fellowship - China Postdoctoral Science Foundation[2017M612653]

Engineering ; Mechanics

Engineering, Mechanical ; Mechanics

WOS:000465191300034

20191206672380

Beryllium minerals ; Calculations ; Couplings ; Electron-phonon interactions ; Electronic scales ; Femtosecond lasers ; Heat transfer ; Melting ; Metallic films ; Molecular dynamics ; Nickel ; Quantum theory ; Specific heat ; Surface structure ; Thermal conductivity ; Thermal Engineering

Minerals:482.2 ; Nickel:548.1 ; Thermodynamics:641.1 ; Heat Transfer:641.2 ; Laser Applications:744.9 ; Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Mathematics:921 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Quantum Theory; Quantum Mechanics:931.4

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Key Lab Addit Mfg High Performance Mat, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
2.Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA
3.South China Univ Technol, Key Lab Surface Funct Struct, Mfg Guang Dong Higher Educ Inst, Sch Mech & Automot Engn, Guangzhou 510640, Guangdong, Peoples R China

Ji, Pengfei,He, Mengzhe,Rong, Yiming,et al. MULTISCALE INVESTIGATION OF THICKNESS DEPENDENT MELTING THRESHOLDS OF NICKEL FILM UNDER FEMTOSECOND LASER HEATING[C]. THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA:AMER SOC MECHANICAL ENGINEERS,2019.