The effect of laser power on the microstructure and wear performance of IN718 superalloy fabricated by laser additive manufacturing


In this study, Inconel 718 (IN718) superalloys were fabricated by laser additive manufacturing (LAM) under different laser power. The microstructure and precipitation phase of IN718 superalloys were examined by optical microscope (OM), X-ray diffraction (XRD), scanning electron microscope (SEM), and energy-dispersive X-ray spectrometer (EDS) methods. The results show that the micropores of the specimens decrease with the increasing laser power. Meanwhile, the morphology of Nb-rich Laves phase changed from skeleton-like to island-like, and the sizes reduced from 10 to below 2 μm. When the laser power of 1200 W is applied, the dense microstructure and the uniformly distributed Laves phase with smallest volume and quantity are observed. The dry sliding test is performed to record the coefficient of friction (CoF) and wear loss of IN718 superalloys, and then the wear surface is detected by a laser scanning confocal microscope (LSCM) and a SEM. The results indicate that the laser power played a crucial role in wear performance of the specimens. At an optimal laser power of 1200 W, a relatively stable friction state and the lowest wear rate of 1.355 × 10−3 mm3 N−1 m−1 are obtained during the wear process. Less debris and slighter plastic deformation are detected and the wear mechanism is abrasive wear and adhesive wear.

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  1. 1.

    Chamanfar A, Sarrat L, Jahazi M, Asadi M, Weck A, Koul AK (2013) Microstructural characteristics of forged and heat treated Inconel-718 disks. Mater Des 52:791–800.

    Article  Google Scholar 

  2. 2.

    Yang HQ, Bao R, Zhang JY, Peng L, Fei BJ (2011) Crack growth behaviour of a nickel-based powder metallurgy superalloy under elevated temperature. Int J Fatigue 33:632–641.

    Article  Google Scholar 

  3. 3.

    Wen DX, Lin YC, Li HB, Chen XM, Deng J, Li LT (2014) Hot deformation behavior and processing map of a typical Ni-based superalloy. Mater Sci Eng A 591:183–192.

    Article  Google Scholar 

  4. 4.

    Gu DD, Meiners W, Wissenbach K, Poprawe R (2017) Laser additive manufacturing of metallic components: materials, processes and mechanisms. Int Mater Rev 57:133–164.

    Article  Google Scholar 

  5. 5.

    Sun S, Zhang YF, Liu CM, Deng PR, Zeng M, Wang FF, Ma P, Li WG, Wang Y (2019) Effects of laser processing parameters on microstructure and mechanical properties of additively manufactured AlSi10Mg alloys reinforced by TiC. Int J Adv Manuf Technol 103:3235–3246.

    Article  Google Scholar 

  6. 6.

    Du W, Bai Q, Zhang B (2018) Machining characteristics of 18Ni-300 steel in additive/subtractive hybrid manufacturing. Int J Adv Manuf Technol 95:2509–2519.

    Article  Google Scholar 

  7. 7.

    Dinda GP, Dasgupta AK, Mazumder J (2009) Laser aided direct metal deposition of Inconel 625 superalloy: microstructural evolution and thermal stability. Mater Sci Eng A 509:98–104.

    Article  Google Scholar 

  8. 8.

    Cherry JA, Davies HM, Mehmood S, Lavery NP, Brown SGR, Sienz J (2014) Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting. Int J Adv Manuf Technol 76:869–879.

    Article  Google Scholar 

  9. 9.

    Yang YY, Gong YD, Qu SS, Rong YL, Sun Y, Cai M (2018) Densification, surface morphology, microstructure and mechanical properties of 316L fabricated by hybrid manufacturing. Int J Adv Manuf Technol 97:2687–2696.

    Article  Google Scholar 

  10. 10.

    Li PF, Gong YD, Xu YC, Qi Y, Sun Y, Zhang H (2019) Inconel-steel functionally bimetal materials by hybrid directed energy deposition and thermal milling: microstructure and mechanical properties. Arch Civ Mech Eng 19:820–831.

    Article  Google Scholar 

  11. 11.

    Deng D, Peng RL, Brodin H, Moverare J (2018) Microstructure and mechanical properties of Inconel 718 produced by selective laser melting: sample orientation dependence and effects of post heat treatments. Mater Sci Eng A 713:294–306.

    Article  Google Scholar 

  12. 12.

    Wang Z, Guan K, Gao M, Li XY, Chen XF, Zeng XY (2012) The microstructure and mechanical properties of deposited-IN718 by selective laser melting. J Alloys Compd 513:518–523.

    Article  Google Scholar 

  13. 13.

    Paul CP, Ganesh P, Mishra SK, Bhargava P, Negi J, Nath AK (2007) Investigating laser rapid manufacturing for Inconel-625 components. Opt Laser Technol 39:800–805.

    Article  Google Scholar 

  14. 14.

    Jia QB, Gu DD (2014) Selective laser melting additive manufactured Inconel 718 superalloy parts: high-temperature oxidation property and its mechanisms. Opt Laser Technol 62:161–171.

    Article  Google Scholar 

  15. 15.

    Choi JP, Shin GH, Yang S, Yang DY, Lee JS, Brochu M, Yu JH (2017) Densification and microstructural investigation of Inconel 718 parts fabricated by selective laser melting. Powder Technol 310:60–66.

    Article  Google Scholar 

  16. 16.

    OdabaşI A, Ünlü N, Göller G, Eruslu MN (2010) A study on laser beam welding (LBW) technique: effect of heat input on the microstructural evolution of superalloy Inconel 718. Metall Mater Trans A Phys Metall Mater Sci 41:2357–2365.

    Article  Google Scholar 

  17. 17.

    Ma MM, Wang Z, Zeng XY (2015) Effect of energy input on microstructural evolution of direct laser fabricated IN718 alloy. Mater Charact 106:420–427.

    Article  Google Scholar 

  18. 18.

    Zhou LB, Yuan TC, Li RD, Li LB (2019) Two ways of evaluating the wear property of Ti-13Nb-13Zr fabricated by selective laser melting. Mater Lett 242:9–12.

    Article  Google Scholar 

  19. 19.

    Zhu L, Xu ZF, Liu P, Gu YF (2018) Effect of processing parameters on microstructure of laser solid forming Inconel 718 superalloy. Opt Laser Technol 98:409–415.

    Article  Google Scholar 

  20. 20.

    Li X, Shi JJ, Wang CH, Russell AM, Zhou ZJ, Li CP, Chen GF (2018) Effect of heat treatment on microstructure evolution of Inconel 718 alloy fabricated by selective laser melting. J Alloys Compd 764:639–649.

    Article  Google Scholar 

  21. 21.

    Xiao H, Li SM, Xiao WJ, Li YQ, Cha LM, Mazumderc J, Song LJ (2017) Effects of laser modes on Nb segregation and Laves phase formation during laser additive manufacturing of nickel-based superalloy. Mater Lett 188:260–262.

    Article  Google Scholar 

  22. 22.

    Lambarri J, Leunda J, García Navas V, Carlos S, Carmen S (2013) Microstructural and tensile characterization of Inconel 718 laser coatings for aeronautic components. Opt Lasers Eng 51:813–821.

    Article  Google Scholar 

  23. 23.

    Qin XZ, Guo JT, Yuan C, Chen CL, Hou JS, Ye HQ (2008) Decomposition of primary MC carbide and its effects on the fracture behaviors of a cast Ni-base superalloy. Mater Sci Eng A 485:74–79.

    Article  Google Scholar 

  24. 24.

    Chlebus E, Gruber K, Kuźnicka B, Kurzac J, Kurzynowski T (2015) Effect of heat treatment on the microstructure and mechanical properties of Inconel 718 processed by selective laser melting. Mater Sci Eng A 639:647–655.

    Article  Google Scholar 

  25. 25.

    Li YL, Gu DD (2014) Parametric analysis of thermal behavior during selective laser melting additive manufacturing of aluminum alloy powder. Mater Des 63:856–867.

    Article  Google Scholar 

  26. 26.

    Gu DD, Chang F, Dai DH (2015) Selective laser melting additive manufacturing of novel aluminum based composites with multiple reinforcing phases. J Manuf Sci E T ASME 137:1–11.

    Article  Google Scholar 

  27. 27.

    Saad A (2013) Laser powder-bed fusion additive manufacturing: physics of complex melt flow and formation mechanisms of pores, spatter, and denudation zones. J Chem Inf Model 53:1689–1699.

    Article  Google Scholar 

  28. 28.

    Sui S, Chen J, Ming X, Zhang SP, Lin X, Huang WD (2017) The failure mechanism of 50% laser additive manufactured Inconel 718 and the deformation behavior of Laves phases during a tensile process. Int J Adv Manuf Technol 91:2733–2740.

    Article  Google Scholar 

  29. 29.

    Nie PL, Ojo OA, Li ZG (2014) Numerical modeling of microstructure evolution during laser additive manufacturing of a nickel-based superalloy. Acta Mater 77:85–95.

    Article  Google Scholar 

  30. 30.

    Gu DD, Hagedorn YC, Meiners W, Meng GB, Batista RJS, Wissenbach K, Poprawe R (2012) Densification behavior, microstructure evolution, and wear performance of selective laser melting processed commercially pure titanium. Acta Mater 60:3849–3860.

    Article  Google Scholar 

  31. 31.

    Kang N, Coddet P, Chen CY, Wang Y, Liao HL, Coddet C (2016) Microstructure and wear behavior of in-situ hypereutectic Al-high Si alloys produced by selective laser melting. Mater Des 99:120–126.

    Article  Google Scholar 

  32. 32.

    Rong T, Gu DD, Shi QM, Cao SN, Xia MJ (2016) Effects of tailored gradient interface on wear properties ofWC/Inconel 718 composites using selective laser melting. Surf Coat Technol 307:418–427.

    Article  Google Scholar 

  33. 33.

    Kang N, Coddet P, Liao HL, Baur T, Coddet C (2016) Wear behavior and microstructure of hypereutectic Al-Si alloys prepared by selective laser melting. Appl Surf Sci 378:142–149.

    Article  Google Scholar 

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The authors received support from the National Natural Science Foundation of China (No. 51775100) and the Fundamental Research Funds for the Central Universities under grant number N170306003.

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Correspondence to Yadong Gong.

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Xu, Y., Gong, Y., Li, P. et al. The effect of laser power on the microstructure and wear performance of IN718 superalloy fabricated by laser additive manufacturing. Int J Adv Manuf Technol 108, 2245–2254 (2020).

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  • IN718 superalloys
  • Laser additive manufacturing (LAM)
  • Laves phase
  • Wear performance