[2] [2] GU D D, SHI X Y, POPRAWE R, et al. Materialstructureperformance integrated lasermetal additive manufacturing［J］. Science, 2021, 372(6545): eabg1487.

[3] [3] SHI R P, KHAIRALLAH S A, ROEHLING T T, et al. Microstructural control in metal laser powder bed fusion additive manufacturing using laser beam shaping strategy［J］. Acta Materialia, 2020, 184: 284305.

[4] [4] LI S M, XIAO H, LIU K Y, et al. Meltpool motion, temperature variation and dendritic morphology of Inconel 718 during pulsedand continuouswave laser additive manufacturing: A comparative study［J］. Materials & Design, 2017, 119: 351360.

[6] [6] NASSAR A R, REUTZEL E W. Additive manufacturing of Ti6Al4V using a pulsed laser beam［J］. Metallurgical and Materials Transactions A, 2015, 46(6): 27812789.

[7] [7] SUNDQVIST J, KAPLAN A F H, SHACHAF L, et al. Analytical heat conduction modelling for shaped laser beams［J］. Journal of Materials Processing Technology, 2017, 247: 4854.

[8] [8] YAN L, ZHANG Y L, LIOU F. A conceptual design of residual stress reduction with multiple shape laser beams in direct laser deposition［J］. Finite Elements in Analysis and Design, 2018, 144: 3037.

[9] [9] ROEHLING T T, WU S S Q, KHAIRALLAH S A, et al. Modulating laser intensity profile ellipticity for microstructural control during metal additive manufacturing［J］. Acta Materialia, 2017, 128: 197206.

[10] [10] XIAO H, LI S M, HAN X, et al. Laves phase control of Inconel 718 alloy using quasicontinuouswave laser additive manufacturing［J］. Materials & Design, 2017, 122: 330339.

[11] [11] GHARBI M, PEYRE P, GORNY C, et al. Influence of a pulsed laser regime on surface finish induced by the direct metal deposition process on a Ti64 alloy［J］. Journal of Materials Processing Technology, 2013, 213(5): 791800.

[12] [12] WANG X L, DENG D W, YI H L, et al. Influences of pulse laser parameters on properties of AISI316L stainless steel thinwalled part by laser material deposition［J］. Optics Laser Technology, 2017, 92: 514.

[13] [13] CHEN D, CAI Y H, LUO Y, et al. Analysis on the microstructure regulation based on the pulsed laser oscillating molten pool in LaserPTA additive manufacturing［J］. Journal of Manufacturing Processes, 2020, 59: 587594.

[14] [14] CHENG M P, XIAO X F, LUO G Y, et al. Integrated control of molten pool morphology and solidification texture by adjusting pulse duration in laser additive manufacturing of Inconel 718［J］. Optics Laser Technology, 2021, 142: 107137.

[15] [15] ULLSPERGER T, LIU D M, YREKLI B, et al. Ultrashort pulsed laser powder bed fusion of AlSi alloys: Impact of pulse duration and energy in comparison to continuous wave excitation［J］. Additive Manufacturing, 2021, 46: 102085.

[16] [16] HAN L, LIOU F W. Numerical investigation of the influence of laser beam mode on melt pool［J］. International Journal of Heat and Mass Transfer, 2004, 47(19/20): 43854402.

[18] [18] CHENG M P, XIAO X F, LUO G Y, et al. Effect of laser intensity profile on the microstructure and texture of Inconel 718 superalloy fabricated by direct energy deposition［J］. Journal of Materials Research and Technology, 2022, 18: 20012012.

[19] [19] WU J Z, REN S, ZHANG Y, et al. Influence of spatial laser beam profiles on thermalfluid transport during laserbased directed energy deposition［J］. Virtual and Physical Prototyping, 2021, 16(4): 444459.

[20] [20] LI C, YU Z B, GAO J X, et al. Numerical simulation and experimental study on the evolution of multifield coupling in laser cladding process by disk lasers［J］. Welding in the World, 2019, 63(4): 925945.

[21] [21] JIN K N, YANG Z Y, CHEN P, et al. Dynamic solidification process during laser cladding of IN718: Multiphysics model, solute suppressed nucleation and microstructure evolution［J］. International Journal of Heat and Mass Transfer, 2022, 192: 122907.

[22] [22] KASHYAP B P, TANGRI K. On the HallPetch relationship and substructural evolution in type 316L stainless steel［J］. Acta Metallurgica et Materialia, 1995, 43(11): 39713981.