[1] Zhang X Y, Li X B, Tan Z et al. Microstructure and mechanical properties of water atomized Cu-10Sn alloy powder formed parts by selective laser melting[J]. Chinese Journal of Lasers, 45, 1002009(2018).

[2] Read N, Wang W, Essa K et al. Selective laser melting of AlSi10Mg alloy: process optimisation and mechanical properties development[J]. Materials & Design, 65, 417-424(2015).

[3] Abele E, Kniepkamp M. Analysis and optimisation of vertical surface roughness in micro selective laser melting[J]. Surface Topography: Metrology and Properties, 3, 034007(2015).

[4] Gao P, Wei K W, Yu H C et al. Influence of layer thickness on microstructure and mechanical properties of selective laser melted Ti-5Al-2.5Sn alloy[J]. Acta Metallurgica Sinica, 54, 999-1009(2018).

[5] Guo Y L, Jia L N, Kong B et al. Single track and single layer formation in selective laser melting of niobium solid solution alloy[J]. Chinese Journal of Aeronautics, 31, 860-866(2018).

[6] Demtröder W. Optics of Gaussian beams[M]. ∥Laser Spectroscopy. Berlin, Heidelberg: Springer Berlin Heidelberg, 421-429(2014).

[7] Bean G E, Witkin D B. McLouth T D, et al. Effect of laser focus shift on surface quality and density of Inconel 718 parts produced via selective laser melting[J]. Additive Manufacturing, 22, 207-215(2018).

[8] Metelkova J, Kinds Y, Kempen K et al. On the influence of laser defocusing in selective laser melting of 316L[J]. Additive Manufacturing, 23, 161-169(2018).

[9] Yao Y Z, Huang Y H, Chen B et al. Influence of processing parameters and heat treatment on the mechanical properties of 18Ni300 manufactured by laser based directed energy deposition[J]. Optics & Laser Technology, 105, 171-179(2018).

[10] Yin S, Chen C Y, Yan X C et al. The influence of aging temperature and aging time on the mechanical and tribological properties of selective laser melted maraging 18Ni-300 steel[J]. Additive Manufacturing, 22, 592-600(2018).

[11] McLouth T D, Bean G E, Witkin D B et al. The effect of laser focus shift on microstructural variation of Inconel 718 produced by selective laser melting[J]. Materials & Design, 149, 205-213(2018).

[12] Mai S Z, Yang Y Q, Wang D. Study on surface morphology and roughness variation of NiCr alloy curved surface manufactured by selective laser melting[J]. Chinese Journal of Lasers, 42, 1203004(2015).

[13] Gu D D, Shen Y F. Effects of processing parameters on consolidation and microstructure of W-Cu components by DMLS[J]. Journal of Alloys and Compounds, 473, 107-115(2009).

[14] Casati R, Lemke J, Tuissi A et al. Aging behaviour and mechanical performance of 18-Ni300 steel processed by selective laser melting[J]. Metals, 6, 218(2016).

[15] Asgari H, Mohammadi M. Microstructure and mechanical properties of stainless steel CX manufactured by direct metal laser sintering[J]. Materials Science and Engineering: A, 709, 82-89(2018).

[16] Ma M M, Wang Z M, Gao M et al. Layer thickness dependence of performance in high-power selective laser melting of 1Cr18Ni9Ti stainless steel[J]. Journal of Materials Processing Technology, 215, 142-150(2015).

[17] Wang D, Song C H, Yang Y Q et al. Investigation of crystal growth mechanism during selective laser melting and mechanical property characterization of 316L stainless steel parts[J]. Materials & Design, 100, 291-299(2016).

[18] Hu H Q[M]. Principle of metal solidification, 164-168(2007).

[19] Chen S, Tao F H, Jia C Z. Microstructure and micro-hardness of 4Cr5MoSiV1 die steels fabricated by selective laser melting[J]. Chinese Journal of Lasers, 46, 0102007(2019).

[20] Song B, Dong S J, Liu Q et al. Vacuum heat treatment of iron parts produced by selective laser melting: microstructure, residual stress and tensile behavior[J]. Materials & Design, 54, 727-733(2014).

[21] Song B, Dong S J, Zhang B C et al. Effects of processing parameters on microstructure and mechanical property of selective laser melted Ti6Al4V[J]. Materials & Design, 35, 120-125(2012).

[22] Kurz W, Fisher D J. Fundamentals of solidification[M]. Zürich: Trans Tech Publications(1986).

[23] Zhong Y, Liu L F, Wikman S et al. Intragranular cellular segregation network structure strengthening 316L stainless steel prepared by selective laser melting[J]. Journal of Nuclear Materials, 470, 170-178(2016).