Influence of processing parameters on deposition characteristics of Inconel 625 superalloy fabricated by laser solid forming

Abstract

A series of single track clads of Inconel 625 alloy were fabricated by laser solid forming. To achieve the high dimensional accuracy and excellent mechanical properties, the effect of processing parameters on the geometry, the formation of Laves phase and the residual stress was investigated. The results show that laser power and scanning speed had a dramatical influence on the width and height of single-track clads. According to the columnar to equiaxed transition curve of Inconel 625, the grain morphology can be predicted during the LSF process. With the increasing laser power and the decreasing scanning speed, the segregation degree of Si, Nb, Mo, the volume fraction and size of Laves phase increased. Vickers indentation was used to demonstrate that optimizing processing parameter can achieve the minimum residual tensile stress.

Keywords

single track clads / Inconel 625 alloy / Laves phase / residual stress / laser solid forming

References

[1] PaulC P, GaneshP, MishraS K, BhargavaP, NegiJ, NathA K. Investigating laser rapid manufacturing for Inconel-625 components [J]. Optics & Laser Technology, 2007, 39(4): 800-805

[2] SHOEMAKER L E. Alloys 625 and 725: Trends in properties and applications [C]// Superalloys, 718, 625, 706 and Various Derivatives, 2005. TMS, 2005. DOI: https://doi.org/10.7449/2005/superalloys_2005_409_418.

[3] WANG X Q, GONG X B, CHOU K. Review on powder-bed laser additive manufacturing of Inconel 718 parts [C]// Proceedings of ASME 2015 International Manufacturing Science and Engineering Conference. Charlotte, North Carolina, USA. 2015: 8–12. DOI: https://doi.org/10.1115/MSEC2015-9322.

[4] PaulC P, JainA, GaneshP, NegiJ, NathA K. Laser rapid manufacturing of Colmonoy-6 components [J]. Optics and Lasers in Engineering, 2006, 44(10): 1096-1109

[5] HerzogD, SeydaV, WyciskE, EmmelmannC. Additive manufacturing of metals [J]. Acta Materialia, 2016, 117: 371-392

[6] KhairallahS A, AndersonA T, RubenchikA, KingW E. Laser powder-bed fusion additive manufacturing: Physics of complex melt flow and formation mechanisms of pores, spatter, and denudation zones [J]. Acta Materialia, 2016, 108: 36-45

[7] ENGLISH C L, TEWARI S K, ABBOTT D H. An overview of Ni base additive fabrication technologies for aerospace applications [C]// 7th International Symposium on Super Alloy 718 and Derivatives, 2010. Pittsburgh, PA: TMS and ASM, 2010, 1: 399–412.

[8] ZhaoW-w, LinX, LiuF-c, ZhaoX-m, ChenJ, HuangW-dong. Effect of heat treatment on microstructure and mechanical properties of laser solid forming inconel 718 superalloy [J]. Chinese Journal of Lasers, 2009, 36(12): 3220 in Chinese)

[9] MingX-l, ChenJ, TanH, YangH-o, LinX. Research on persistent fracture mechanism of laser forming repaired GH4169 superalloy [J]. Chinese Journal of Lasers, 2015, 4240403005 in Chinese)

[10] SchirraJ J, CalessR H, HatalaR W. The effect of laves phase on the mechanical properties of wrought and cast + HIP Inconel 718 [C]. Proceedings of the Conference on Superalloys 718, 625 and Various Derivatives, 1991, Warrendale, PA, The Minerals, Metals and Materials Society, 375-388

[11] ZhangY-c, LiZ-g, NieP-l, WuY-xiong. Effect of precipitation on the microhardness distribution of diode laser epitaxially deposited IN718 alloy coating [J]. Journal of Materials Science & Technology, 2013, 29(4): 349-352

[12] OnoY, YuriT, NagashimaN, SumiyoshiH, OgataT, NagaoN. High-cycle fatigue properties of alloy 718 base metal and electron beam welded joint [J]. Physics Procedia, 2015, 67: 1028-1035

[13] SuiS, ChenJ, FanE-x, YangH-o, LinX, HuangW-dong. The influence of Laves phases on the high-cycle fatigue behavior of laser additive manufactured Inconel 718 [J]. Materials Science and Engineering A, 2017, 695: 6-13

[14] YangJ, HuangW D, ChenJ, LinX. Residual stress on the laser rapid forming metal part [J]. Applied Laser, 2004, 24(1): 5-8

[15] MaziaszP J, PayzantE A, SchliengerM E, MchughK M. Residual stresses and microstructure of H13 steel formed by combining two different direct fabrication methods [J]. Scripta Materialia, 1998, 39(10): 1471-1476

[16] ChenY, LuF-g, ZhangK, NieP-l, ElmiH S R, FengK, LiZ-guo. Dendritic microstructure and hot cracking of laser additive manufactured Inconel 718 under improved base cooling [J]. Journal of Alloys and Compounds, 2016, 670: 312-321

[17] HuY L, LinX, SongK, JiangX Y, YangH O, HuangW D. Effect of heat input on cracking in laser solid formed DZ4125 superalloy [J]. Optics & Laser Technology, 2016, 86: 1-7

[18] ZhangM-c, CaoG-x, DongJ-x, ZhengL, YaoZ-hao. Investigations on dissolution mechanism of laves phase in GH4169 alloy ingot based on classical dynamical model [J]. Acta Metallurgica Sinica, 2013, 49(3): 372-378 in Chinese)

[19] LiuF-c, LinX, YangG-l, SongM-h, ChenJ, HuangW-dong. Microstructure and residual stress of laser rapid formed Inconel 718 nickel-base superalloy [J]. Optics & Laser Technology, 2011, 43(1): 208-213

[20] XiaoH, LiS-m, HanX, MazumderJ, SongL-jun. Laves phase control of Inconel 718 alloy using quasi-continuous-wave laser additive manufacturing [J]. Materials & Design, 2017, 122: 330-339

[21] XiaoH, LiS M, XiaoW J, LiY Q, ChaL M, MazumderJ, SongL J. Effects of laser modes on Nb segregation and Laves phase formation during laser additive manufacturing of nickel-based superalloy [J]. Materials Letters, 2017, 188: 260-262

[22] PicassoM, MarsdenC F, WagniereJ D, FrenkA, RappazM. A simple but realistic model for laser cladding [J]. Metallurgical and Materials Transactions B, 1994, 25(2): 281-291

[23] RappazM, GandinC A. Probabilistic modelling of microstructure formation in solidification processes [J]. Acta Metallurgica et Materialia, 1993, 41(2): 345-360

[24] GandinC A, RappazM. A coupled finite element-cellular automaton model for the prediction of dendritic grain structures in solidification processes [J]. Acta Metallurgica et Materialia, 1994, 42(7): 2233-2246

[25] GäumannM, BezençonC, CanalisP, KurzW. Single-crystal laser deposition of superalloys: Processing-microstructure maps [J]. Acta Materialia, 2001, 49(6): 1051-1062

[26] RenY M, LinX, FuX, TanH, ChenJ, HuangW D. Microstructure and deformation behavior of Ti-6Al-4V alloy by high-power laser solid forming [J]. Acta Materialia, 2017, 132: 82-95

[27] ZhengL, ChellaliR, SchlesigerR, BaitherD, SchmitzG. Intermediate temperature embrittlement in high-purity Ni and binary Ni(Bi) alloy [J]. Scripta Materialia, 2011, 65(5): 428-431

[28] HuY L, LinX, YuX B, XuJ J, LeiM, HuangW D. Effect of Ti addition on cracking and microhardness of Inconel 625 during the laser solid forming processing [J]. Journal of Alloys and Compounds, 2017, 711: 267-277

[29] XuJ-j, LinX, GuoP-f, DongH-b, WenX-l, LiQ-g, XueL, HuangW-dong. The initiation and propagation mechanism of the overlapping zone cracking during laser solid forming of IN-738LC superalloy [J]. Journal of Alloys and Compounds, 2018, 749: 859-870