[1] Zhang Y W, Zhang S Q, Wang H M. Microstructure and mechanical properties of directional rapidly solidified Ni-base superalloy Rene95 by laser melting deposition manufacturing[J]. Rare Metal Materials and Engineering, 37, 169-172(2008).

[2] Chaudhary V, Mantri S A, Ramanujan R V et al. Additive manufacturing of magnetic materials[J]. Progress in Materials Science, 114, 100688(2020). http://www.sciencedirect.com/science/article/pii/S0079642520300529

[3] Cooke S, Ahmadi K, Willerth S et al. Metal additive manufacturing: technology, metallurgy and modelling[J]. Journal of Manufacturing Processes, 57, 978-1003(2020). http://www.sciencedirect.com/science/article/pii/S1526612520304503

[4] Powell D, Rennie A E W, Geekie L et al. Understanding powder degradation in metal additive manufacturing to allow the upcycling of recycled powders[J]. Journal of Cleaner Production, 268, 122077(2020).

[5] Katancik M, Mirzababaei S, Ghayoor M et al. Selective laser melting and tempering of H13 tool steel for rapid tooling applications[J]. Journal of Alloys and Compounds, 849, 156319(2020). http://www.sciencedirect.com/science/article/pii/S0925838820326839

[6] Chouhan A, Aggarwal A, Kumar A. A computational study of porosity formation mechanism, flow characteristics and solidification microstructure in the L-DED process[J]. Applied Physics A, 126, 833(2020). http://link.springer.com/article/10.1007/s00339-020-04013-3

[7] Vilardell A M, Krakhmalev P, Fredriksson G et al. Influence of surface topography on fatigue behavior of Ti6Al4V alloy by laser powder bed fusion[J]. Procedia CIRP, 74, 49-52(2018). http://www.sciencedirect.com/science/article/pii/S2212827118308126

[8] Qiu Y, Zhang F Y, Hu T T et al. Effect of laser power on microstructure and hardness of Ti40 flame-retardant titanium alloy deposited by laser cladding on TC4 surface[J]. Chinese Journal of Lasers, 46, 1102011(2019).

[9] Qin L Y, Wu J B, Wang W et al. Microstructures and fatigue properties of Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V titanium alloy fabricated using laser deposition manufacturing[J]. Chinese Journal of Lasers, 47, 1002008(2020).

[10] Liao C H, Zhou J, Shen H. Electrochemical corrosion behaviors before and after laser polishing of additive manufactured TC4 titanium alloy[J]. Chinese Journal of Lasers, 47, 0102003(2020).

[11] Józwik J, Ostrowski D, Milczarczyk R et al. Analysis of relation between the 3D printer laser beam power and the surface morphology properties in Ti-6Al-4V titanium alloy parts[J]. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 40, 215(2018).

[12] Qi Z J, Zhang X X, Wang Y Y et al. Effect of B on microstructure and tensile properties of laser additive manufactured TC4 alloy[J]. Chinese Journal of Lasers, 47, 0602002(2020).

[13] Zhan Y, Liu C, Zhang J J et al. Measurement of residual stress in laser additive manufacturing TC4 titanium alloy with the laser ultrasonic technique[J]. Materials Science and Engineering A, 762, 138093(2019). http://www.sciencedirect.com/science/article/pii/S0921509319308792

[14] Zhu Y Y, Tang H B, Li Z et al. Solidification behavior and grain morphology of laser additive manufacturing titanium alloys[J]. Journal of Alloys and Compounds, 777, 712-716(2019). http://www.sciencedirect.com/science/article/pii/S0925838818341720

[15] Gu D D, Zhang H M, Chen H Y et al. Laser additive manufacturing of high-performance metallic aerospace components[J]. Chinese Journal of Lasers, 47, 0500002(2020).

[16] Zhang B, Liu S Y, Shin Y C. In-process monitoring of porosity during laser additive manufacturing process[J]. Additive Manufacturing, 28, 497-505(2019). http://www.sciencedirect.com/science/article/pii/S2214860419303653

[17] Todaro C J, Easton M A, Qiu D et al. Grain structure control during metal 3D printing by high-intensity ultrasound[J]. Nature Communications, 11, 142(2020). http://www.nature.com/articles/s41467-019-13874-z

[18] Kistler N A, Corbin D J, Nassar A R et al. Effect of processing conditions on the microstructure, porosity, and mechanical properties of Ti-6Al-4V repair fabricated by directed energy deposition[J]. Journal of Materials Processing Technology, 264, 172-181(2019).

[19] Liu S Y, Shin Y C. Additive manufacturing of Ti6Al4V alloy: a review[J]. Materials & Design, 164, 107552(2019).

[20] Cho J Y, Xu W, Brandt M et al. Selective laser melting-fabricated Ti-6Al-4V alloy: microstructural inhomogeneity, consequent variations in elastic modulus and implications[J]. Optics & Laser Technology, 111, 664-670(2019). http://www.sciencedirect.com/science/article/pii/S0030399218309538

[21] Zhang X Y, Fang G, Leeflang S et al. Effect of subtransus heat treatment on the microstructure and mechanical properties of additively manufactured Ti-6Al-4V alloy[J]. Journal of Alloys and Compounds, 735, 1562-1575(2018). http://www.sciencedirect.com/science/article/pii/S0925838817340458

[22] Kumar P, Prakash O, Ramamurty U. Micro-and meso-structures and their influence on mechanical properties of selectively laser melted Ti-6Al-4V[J]. Acta Materialia, 154, 246-260(2018). http://www.sciencedirect.com/science/article/pii/S1359645418304117

[23] Cao S, Chen Z E, Lim C V S et al. Defect, microstructure, and mechanical property of Ti-6Al-4V alloy fabricated by high-power selective laser melting[J]. The Journal of The Minerals, Metals & Materials Society, 69, 2684-2692(2017).

[24] Iebba M, Astarita A, Mistretta D et al. Influence of powder characteristics on formation of porosity in additive manufacturing of Ti-6Al-4V components[J]. Journal of Materials Engineering and Performance, 26, 4138-4147(2017). http://link.springer.com/10.1007/s11665-017-2796-2

[25] Walker K F, Liu Q, Brandt M. Evaluation of fatigue crack propagation behaviour in Ti-6Al-4V manufactured by selective laser melting[J]. International Journal of Fatigue, 104, 302-308(2017). http://www.sciencedirect.com/science/article/pii/S0142112317303043

[26] Zhang X Y, Zhao Y Q, Bai C G. Titanium alloy and applications[M], 62-63(2005).

[27] Guan Z Z. Laser processing technology manual[M], 240-241(1998).