Productivity-oriented SLM process parameters effect on the fatigue strength of Inconel 718
Source abstract
Abstract
The low productivity of the SLM process is known to be a limiting factor, but speeding up the process can lead to material defects. Two sets of SLM process parameters enhancing its productivity by 50 % were devised and tested in comparison with baseline sets, in terms of material microstructure, porosity, surface roughness, static mechanical properties, and HCF behavior, in the as-built and aged conditions. The as-built surface was investigated. Despite a significant increase in the porosity and surface roughness, the fatigue strength was reduced by 5 %. The Murakami areaR parameter effectively correlates the fatigue strength and surface roughness variations.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Aluminum Alloy Microstructure Properties · Welding Techniques and Residual Stresses
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (50)
Show source-provided references
1. The effect of energy density on texture and mechanical anisotropy in selective laser melted Inconel 718
2. On selective laser melting of Inconel 718: Densification, surface roughness, and residual stresses10.1016/j.matdes.2020.108818 ↗
3. Microstructure and hardness studies of Inconel 718 manufactured by selective laser melting before and after solution heat treatment10.1016/j.msea.2017.02.062 ↗
4. Texture and microstructural features at different length scales in Inconel 718 produced by selective laser melting
5. 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 ↗
6. Study on the effect of powder-bed fusion process parameters on the quality of as-built in718 parts using response surface methodology10.3390/met10091180 ↗
7. Effect of scanning strategy on grain structure and crystallographic texture of Inconel 718 processed by selective laser melting10.1016/j.jmst.2018.02.002 ↗
8. A study of the relationship between thermal expansion and residual stresses in selective laser melting of Ti-6Al-4V10.1016/j.jmapro.2020.01.039 ↗
9. Mechanisms driving high-cycle fatigue life of as-built Inconel 718 processed by laser powder bed fusion10.1016/j.msea.2019.06.003 ↗
10. A modified volumetric energy density–based approach for porosity assessment in additive manufacturing process design10.1007/s00170-020-05949-9 ↗
11. Technological implications of the Rosenthal solution for a moving point heat source in steady state on a semi-infinite solid10.1016/j.matdes.2022.110991 ↗
12. Moda M. Modeling of Powder Bed Fusion Additive Manufacturing. University of Pisa, 2021. https://doi.org/10.13131/etd/03092021-124517.
13. Melt pool geometry and morphology variability for the Inconel 718 alloy in a laser powder bed fusion additive manufacturing process
14. Defects as a root cause of fatigue weakening of additively manufactured AlSi10Mg components10.1016/j.tafmec.2020.102611 ↗
15. Low- and high-cycle fatigue resistance of Ti-6Al-4V ELI additively manufactured via selective laser melting: Mean stress and defect sensitivity10.1016/j.ijfatigue.2017.10.021 ↗
16. Fatigue assessment of as-built and heat-treated Inconel 718 specimens produced by additive manufacturing including notch effects10.1111/ffe.13300 ↗
17. Metal Fatigue
18. Effects of defects, inclusions and inhomogeneities on fatigue strength10.1016/0142-1123(94)90001-9 ↗
19. Material defects as the basis of fatigue design10.1016/j.ijfatigue.2011.12.001 ↗
20. A comparison of fatigue strength sensitivity to defects for materials manufactured by AM or traditional processes10.1016/j.ijfatigue.2016.06.020 ↗
21. Defect analysis and fatigue design basis for Ni-based superalloy 718 manufactured by selective laser melting10.1016/j.ijfatigue.2018.08.002 ↗
22. Influence of defects, surface roughness and HIP on the fatigue strength of Ti-6Al-4V manufactured by additive manufacturing10.1016/j.ijfatigue.2018.07.020 ↗
23. Fatigue limit prediction model and fatigue crack growth mechanism for selective laser melting Ti6Al4V samples with inherent defects10.1016/j.ijfatigue.2020.106008 ↗
24. Murakami Y, TsutsumiI K, Fujishima M. Quantitative Evaluation of Effect of Surface Roughness on Fatigue Strength. Transactions of the Japan Society of Mechanical Engineers Series A 1996;62:1124–31. https://doi.org/10.1299/kikaia.62.1124.10.1299/kikaia.62.1124 ↗
25. The Theory of Moving Sources of Heat and Its Application to Metal Treatments
26. Microstructure and tribological property of selective laser melted Ni-based composites using different scanning strategies10.1016/j.vacuum.2020.109439 ↗
27. Scaling expressions of characteristic values for a moving point heat source in steady state on a semi-infinite solid10.1016/j.ijheatmasstransfer.2019.02.042 ↗
28. Scaling analysis of a moving point heat source in steady-state on a semi-infinite solid10.1115/1.4039353 ↗
29. Thermophysical properties of Inconel 718 alloy10.1088/1742-6596/1382/1/012175 ↗
30. Montgomery C, Beuth J, Sheridan L, Klingbeil N. Process mapping of Inconel 625 in laser powder bed additive manufacturing. Proceedings - 26th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2015 2020:1195–204.
31. Selective laser melting of typical metallic materials: An effective process prediction model developed by energy absorption and consumption analysis
32. Effect of Si content on the cracking behavior of selective laser melted Al705010.1108/RPJ-12-2018-0310 ↗
33. Humping mechanisms present in high speed welding10.1179/174329306X120787 ↗
34. Fatigue short crack propagation behavior of selective laser melted Inconel 718 alloy by in-situ SEM study: Influence of orientation and temperature10.1016/j.ijfatigue.2020.105739 ↗
35. Effect of standard heat treatment on the microstructure and mechanical properties of selective laser melting manufactured Inconel 718 superalloy10.1016/j.msea.2015.06.021 ↗
36. Schneider CRA, Maddox SJ. Best practice guide on statistical analysis of fatigue data. Granta Park, Great Abington, Cambridge, UK: 1994.
37. Metallographic techniques for superalloys10.1017/S1431927604883442 ↗
38. Fiji: an open-source platform for biological-image analysis10.1038/nmeth.2019 ↗
39. Special Metals. Inconel alloy 718 - SMC-045. 2007.
40. The effect of defects and notches in quasi-static and fatigue loading of Inconel 718 specimens produced by selective laser melting10.1016/j.ijfatigue.2020.105637 ↗
41. Long fatigue crack growth in Inconel 718 produced by selective laser melting10.1016/j.ijfatigue.2016.03.012 ↗
42. Post-processing effects on the surface characteristics of Inconel 718 alloy fabricated by selective laser melting additive manufacturing10.1007/s40964-019-00099-1 ↗
43. Mean stress effects in stress-life fatigue and the Walker equation10.1111/j.1460-2695.2008.01322.x ↗
44. Walker K. The Effect of Stress Ratio During Crack Propagation and Fatigue for 2024-T3 and 7075-T6 Aluminum. Effects of Environment and Complex Load History on Fatigue Life n.d.:1-1–14. doi:10.1520/STP32032S.10.1520/STP32032S ↗
45. Residual stresses in selective laser sintering and selective laser melting10.1108/13552540610707013 ↗
46. Validation of a multi-scale simulation strategy based on the Pointwise Strain Superposition Method10.1088/1757-899X/1038/1/012022 ↗
47. Fatigue crack closure under cyclic tension10.1016/0013-7944(70)90028-7 ↗
48. An engineering estimation of fatigue thresholds from a microstructural size and Vickers hardness: application to wrought and additively manufactured metals10.1016/j.ijfatigue.2020.105796 ↗
49. Engineering estimation of the fatigue limit of wrought and defective additively manufactured metals for different load ratios10.1016/j.ijfatigue.2021.106530 ↗
50. Fatigue strength of LPBF Ti6Al4V machined under flood and cryogenic lubri-cooling conditions10.1016/j.ijfatigue.2022.106973 ↗