Crack elimination of laser powder directed energy deposition Inconel 738LC using in-situ addition of Inconel 718: A comprehensive study on the mechanical and corrosion resistivity properties
Source abstract
Abstract
The additive manufacturing (AM) of Inconel 738LC has faced challenges because of its non-weldability and susceptibility to cracking. This paper presents a novel strategy for producing crack-free Inconel 738LC alloy by using an in-situ alloying method combined with height-dependent process parameter optimization for laser powder directed energy deposition (LP-DED) processes. Upon successful production of samples, comprehensive microstructural, mechanical, and chemical analyses were conducted to evaluate the tensile, hardness, and hot corrosion behavior of the manufactured samples. The properties of the alloyed sample were compared with those of pure Inconel 738LC and Inconel 718 alloys to evaluate the effect of in-situ alloying. The results show that incorporating approximately 20% Inconel 718 into Inconel 738LC enhances its manufacturability while preserving the excellent properties of the base material. The microstructure of the alloyed samples showed a superposition of the pure Inconel 738LC and Inconel 718 alloys. Furthermore, the alloyed samples exhibited a high yield strength of 955 MPa with an elongation at break higher than 8%. The hot corrosion test results also revealed a significant improvement in the corrosion resistance of Inconel 738LC by alloying with Inconel 718 due to the elimination of cracks and the improvement of Cr content.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Welding Techniques and Residual Stresses · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (65)
Show source-provided references
1. Crack inhibition and mechanical property enhancement of a CM247LC alloy fabricated by laser powder bed fusion through remelting strategy
2. HAZ liquation cracking mechanism of IN-738LC superalloy prepared by laser solid forming10.1007/s11661-018-4826-6 ↗
3. Cracking mechanism and susceptibility of laser melting deposited Inconel 738 superalloy10.1016/j.matdes.2019.108105 ↗
4. Classification and definition of high-temperature welding cracks in alloys
5. Noecker · 2007
6. Hot cracking mechanism affecting a non-weldable Ni-based superalloy produced by selective electron beam melting10.1016/j.actamat.2017.09.047 ↗
7. Predicting susceptibility to solidification cracking and liquation cracking by calphad10.3390/met11091442 ↗
8. Direct metal deposition of IN625 on IN738LC superalloy: microstructure and crack analysis10.1007/s00339-021-04464-2 ↗
9. Effects of heat input on metallurgical behavior in HAZ of multi-pass and multi-layer welded IN-939 superalloy10.1016/j.jmrt.2021.08.113 ↗
10. Effect of the volume energy density and heat treatment on the defect, microstructure, and hardness of L-PBF inconel 62510.1007/s11661-020-05992-x ↗
11. Experimental investigation into microstructure, mechanical properties, and cracking mechanism of IN713LC processed by laser powder bed fusion
12. Evaluation of property scatter of Ni-base alloy in 738 LC10.1016/j.msea.2011.02.052 ↗
13. Process-induced microstructural characteristics of laser consolidated IN-738 superalloy10.1016/j.msea.2010.08.003 ↗
14. Optimizing laser powder bed fusion parameters for IN-738LC by response surface method10.3390/ma13214879 ↗
15. A novel method to prevent cracking in directed energy deposition of Inconel 738 by in-situ doping Inconel 71810.1016/j.matdes.2020.109214 ↗
16. Influence of build orientation on the creep behavior of IN738LC manufactured with laser powder bed fusion10.1016/j.msea.2023.145197 ↗
17. Microstructure evolution of Inconel 738 fabricated by pulsed laser powder bed fusion10.1007/s40964-018-0062-2 ↗
18. Reed · 2008
19. Contribution of constitutional liquation of gamma prime precipitate to weld HAZ cracking of cast Inconel 738 superalloy10.1016/j.scriptamat.2003.11.025 ↗
20. On the oxygen-induced hot cracking in a direct laser deposited Ni-based superalloy10.1016/j.scriptamat.2021.113751 ↗
21. Investigations on the microstructure and crack formation of IN738LC samples processed by selective laser melting using Gaussian and doughnut profiles10.1016/j.matdes.2015.10.027 ↗
22. Characterization of heat affected zone liquation cracking in laser additive manufacturing of Inconel 71810.1016/j.matdes.2015.10.155 ↗
23. Direct laser metal deposition of Inconel 73810.1016/j.msea.2018.10.020 ↗
24. Effect of processing parameters on surface roughness, porosity and cracking of as-built IN738LC parts fabricated by laser powder bed fusion10.1016/j.jmatprotec.2020.116788 ↗
25. Processing a non-weldable nickel-base superalloy by selective laser melting: role of the shape and size of the melt pools on solidification cracking10.1016/j.mtla.2020.100686 ↗
26. Grain refinement and crack inhibition of hard-to-weld Inconel 738 alloy by altering the scanning strategy during selective laser melting10.1016/j.matdes.2021.109940 ↗
27. The influence of the laser scan strategy on grain structure and cracking behaviour in SLM powder-bed fabricated nickel superalloy10.1016/j.jallcom.2014.06.172 ↗
28. Study on the microstructure, mechanical property and residual stress of SLM Inconel-718 alloy manufactured by differing island scanning strategy10.1016/j.optlastec.2015.07.009 ↗
29. Laser preheating for hot crack reduction in direct metal deposition of Inconel 738LC10.3390/met12040614 ↗
30. Grain boundary network evolution in electron-beam powder bed fusion nickel-based superalloy Inconel 73810.1016/j.jallcom.2023.172811 ↗
31. Fractal scan strategies for selective laser melting of ‘unweldable’nickel superalloys
32. Correlations of cracking with scan strategy and build geometry in electron beam powder bed additive manufacturing
33. On the role of Zr and B addition on solidification cracking of IN738LC produced by laser powder bed fusion10.1016/j.mtla.2022.101609 ↗
34. The effect of boron and zirconium on the microcracking susceptibility of IN-738LC derivatives in laser powder bed fusion10.1016/j.apsusc.2021.151541 ↗
35. Effect of Zr content on crack formation and mechanical properties of IN738LC processed by selective laser melting10.1016/S1003-6326(21)65582-6 ↗
36. Effect of carbon content on the microstructure, tensile properties and cracking susceptibility of IN738 superalloy processed by laser powder bed fusion
37. Process parameter optimization for laser powder directed energy deposition of Inconel 738LC10.1016/j.optlastec.2024.110940 ↗
38. Multi-objective optimization of directed energy deposition process by using Taguchi-Grey relational analysis10.1007/s00170-022-09210-3 ↗
39. Role of carbon in modifying solidification and microstructure of a Ni-based superalloy with high Al and Ti contents10.1007/s42243-020-00408-x ↗
40. The initiation and propagation mechanism of the overlapping zone cracking during laser solid forming of IN-738LC superalloy10.1016/j.jallcom.2018.03.366 ↗
41. Variation of hardness, microstructure, and Laves phase distribution in direct laser deposited alloy 718 cuboids10.1016/j.matdes.2017.01.031 ↗
42. Effects of the γ ″-Ni3Nb phase on mechanical properties of Inconel 718 Superalloys with different heat treatments10.3390/ma13010151 ↗
43. The influence of Laves phases on the room temperature tensile properties of Inconel 718 fabricated by powder feeding laser additive manufacturing10.1016/j.actamat.2018.10.032 ↗
44. Effect of various heat treatment conditions on microstructure of cast polycrystalline IN738LC alloy10.1016/j.msea.2007.10.004 ↗
45. The effect of phosphorus on the formation of grain boundary laves phase in high-refractory content Ni-based superalloys10.1016/j.scriptamat.2018.10.015 ↗
46. Influence of laser-directed energy deposition process parameters and thermal post-treatments on Nb-rich secondary phases in single-track Alloy 718 specimens10.2351/7.0000259 ↗
47. Laves phase control of inconel 718 superalloy fabricated by laser direct energy deposition via δ aging and solution treatment10.1016/j.jmrt.2020.06.061 ↗
48. Microstructural and texture development in direct laser fabricated IN71810.1016/j.matchar.2013.12.012 ↗
49. Hot corrosion and mechanical performance of repaired Inconel 718 components via laser additive manufacturing10.3390/ma13092128 ↗
50. Davis · 1997
51. Microstructure of IN738LC fabricated using laser powder bed fusion additive manufacturing10.1115/1.4052404 ↗
52. Microstructure formed during selective laser melting of IN738LC in keyhole mode10.1016/j.jallcom.2019.03.419 ↗
53. Effect of continuous cooling rate on the precipitation of gamma prime in nickel-based superalloys10.1016/0956-716X(95)00234-M ↗
54. Metastable carbides and their impact on recrystallisation in IN738LC processed by selective laser melting
55. Microstructure and mechanical properties of crack-free Inconel 738 fabricated by laser powder bed fusion10.1016/j.msea.2022.143524 ↗
56. Effect of microstructural constituents on mechanical properties and fracture toughness of Inconel 718 with anomalous deformation behavior at 650° C10.1016/j.jallcom.2020.156276 ↗
57. Long fatigue crack propagation behavior of laser powder bed-fused Inconel 625 with intentionally-seeded porosity10.1016/j.ijfatigue.2019.06.008 ↗
58. Investigation on the tensile and compressional behavior of Inconel 625 fabricated through laser powder bed fusion10.1007/s11665-021-05672-w ↗
59. Tailoring Laves phase and mechanical properties of directed energy deposited Inconel 718 thin-wall via a gradient laser power method10.1016/j.msea.2021.141822 ↗
60. Hot corrosion behavior and near-surface microstructure of a “low-temperature high-activity Cr-aluminide” coating on Inconel 738LC exposed to Na2SO4, Na2SO4+ V2O5 and Na2SO4+ V2O5+ NaCl at 900° C10.1016/j.corsci.2017.09.004 ↗
61. Hot corrosion behavior of IN738LC alloy formed by selective laser melting10.1016/j.corsci.2022.110154 ↗
62. Hot corrosion behavior of superalloy IN718 at 550 and 650C10.1007/s11665-013-0532-0 ↗
63. Effects of alloyed aluminum and titanium on the oxidation behavior of INCONEL 740 superalloy10.1016/j.jallcom.2015.10.198 ↗
64. Comparison of Isothermal with cyclic oxidation behavior of “Cr-Aluminide” coating on inconel 738LC at 900C10.1007/s11085-016-9657-5 ↗
65. Hot corrosion behaviors of directed energy deposited Inconel 718/Haynes 25 functionally graded material at 700° C and 900° C10.1016/j.corsci.2021.110040 ↗