journal article·2024-02Open access

Fatigue analysis of as-built and heat-treated severely notched AlSi10Mg alloy specimens made by laser powder bed fusion technology

Nima Razavi, Sara Bagherifard, Sondre Hafnor, Saveria Spiller, Mario Guagliano, Filippo Berto

Abstract

This study examines L-PBF-fabricated aluminium alloy specimens with smooth and notched geometries, assessing their axial fatigue performance in both as-built and heat-treated conditions. The influence of the performed heat treatment on microstructure, production defects and fatigue properties was investigated on unnotched specimens and specimens with deep U-notch geometry. The experimental results revealed significant impact of heat treatment on the microstructure and internal defects, which resulted in an enhancement of fatigue properties of the specimens. Lastly, the fatigue results revealed a negligible impact of the employed heat treatment on the notch sensitivity of the studied materials.
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Research context

OpenAlex topics: Additive Manufacturing Materials and Processes · Additive Manufacturing and 3D Printing Technologies · High Entropy Alloys Studies

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References (47)

Show source-provided references
1. Deterministic part orientation in additive manufacturing using feature recognition10.1016/j.procir.2020.05.070 ↗
2. Experimental realisation of build orientation effects on the mechanical properties of truly as-built Ti-6Al-4V SLM parts10.1016/j.jmapro.2021.01.027 ↗
3. Orientation dependency for microstructure, geometric accuracy and mechanical properties of selective laser melting AlSi10Mg lattices10.1016/j.jallcom.2019.03.344 ↗
4. Design optimization of supports for overhanging structures in aluminum and titanium alloys by selective laser melting10.1016/j.matdes.2014.07.043 ↗
5. Effect of heat treatment on fatigue behavior of as-built notched Co-Cr-Mo parts produced by Selective Laser Melting10.1016/j.ijfatigue.2020.105926 ↗
6. The influence of surface finish and build orientation on the low cycle fatigue behaviour of laser powder bed fused stainless steel 316L10.1016/j.msea.2023.144593 ↗
7. Influence of build orientation on high temperature fatigue crack growth mechanisms in Inconel 718 fabricated by laser powder bed fusion: Effects of temperature and hold time10.1016/j.ijfatigue.2022.107484 ↗
8. Additively manufactured Ti–6Al–4V thin struts via laser powder bed fusion: Effect of building orientation on geometrical accuracy and mechanical properties10.1016/j.jmbbm.2021.104495 ↗
9. Effects of build orientation and heat treatment on the microstructure and mechanical properties of selective laser melted Ti6Al4V lattice structures
10. Influence of the structural orientation on the mechanical properties of selective laser melted Ti6Al4V open-porous scaffolds10.1016/j.matdes.2016.01.095 ↗
11. Post-Processing Techniques to Enhance the Quality of Metallic Parts Produced by Additive Manufacturing10.3390/met12010077 ↗
12. Surface post-treatments for metal additive manufacturing: Progress, challenges, and opportunities
13. Long fatigue crack propagation behavior of Inconel 625 processed by laser powder bed fusion: Influence of build orientation and post-processing conditions10.1016/j.ijfatigue.2018.07.008 ↗
14. Influences of horizontal and vertical build orientations and post-fabrication processes on the fatigue behavior of stainless steel 316l produced by selective laser melting10.3390/ma12244203 ↗
15. Geometrical control of lattice structures produced by EBM through chemical etching: Investigations at the scale of individual struts10.1016/j.matdes.2016.08.029 ↗
16. Role of heat treatment and build orientation in the microstructure sensitive deformation characteristics of IN718 produced via SLM additive manufacturing
17. Selective laser melting of ti-6al-4v: The impact of post-processing on the tensile, fatigue and biological properties for medical implant applications10.3390/ma13122813 ↗
18. Factors that affect the properties of additively-manufactured AlSi10Mg: Porosity versus microstructure
19. Hot isostatic pressing in metal additive manufacturing: X-ray tomography reveals details of pore closure
20. Pore space characteristics and corresponding effect on tensile properties of Inconel 625 fabricated via laser powder bed fusion10.1016/j.msea.2019.138525 ↗
21. Mitigation of scan strategy effects and material anisotropy through supersolvus annealing in LPBF IN71810.1016/j.msea.2019.138230 ↗
22. Additive manufactured AlSi10Mg samples using Selective Laser Melting (SLM): Microstructure , high cycle fatigue , and fracture behavior10.1016/j.matdes.2011.07.067 ↗
23. Influences of Post-processing, Location, Orientation, and Induced Porosity on the Dynamic Compression Behavior of Ti–6Al–4V Alloy Built Through Additive Manufacturing10.1007/s40870-018-0157-3 ↗
24. On the effect of process parameters on properties of AlSi10Mg parts produced by DMLS10.1108/RPJ-03-2013-0028 ↗
25. Reducing porosity in AlSi10Mg parts processed by selective laser melting
26. A Fatigue of AlSi10Mg specimens fabricated by additive manufacturing selective laser melting (AM-SLM)10.1016/j.msea.2017.08.027 ↗
27. The microstructure and mechanical properties of selectively laser melted AlSi10Mg: The effect of a conventional T6-like heat treatment10.1016/j.msea.2016.04.092 ↗
28. Corrosion behavior of friction stir welded lap joints of AA6061-T6 aluminum alloy10.1590/S1516-14392014005000053 ↗
29. On the fatigue strength enhancement of additive manufactured AlSi10Mg parts by mechanical and thermal post-processing10.1016/j.matdes.2018.02.055 ↗
30. Surface Roughness Effects on the Fatigue Strength of Additively Manufactured Ti-6Al-4V10.1016/j.ijfatigue.2018.07.013 ↗
31. Laser powder bed fusion of Ti-6Al-4V parts: Thermal modeling and mechanical implications10.1016/j.ijmachtools.2017.04.007 ↗
32. E ff ect of build thickness and geometry on quasi-static and fatigue behavior of Ti-6Al-4V produced by Electron Beam Melting
33. Stephens IR, Fatemi A, Stephens RR, Fuchs OH. Metal Fatigue in Engineering. 2nd Editio. 2000.
34. Surface & Coatings Technology Hybrid thermal, mechanical and chemical surface post-treatments for improved fatigue behavior of laser powder bed fusion AlSi10Mg notched samples10.1016/j.surfcoat.2021.127962 ↗
35. Mean stress effects in stress-life fatigue and the Walker equation10.1111/j.1460-2695.2008.01322.x ↗
36. Materials Science & Engineering A Influence of heat treatment on the high-cycle fatigue properties and fatigue damage mechanism of selective laser melted AlSi10Mg alloy10.1016/j.msea.2021.141486 ↗
37. Materials Science & Engineering A Fatigue and fracture behaviour of laser powder bed fusion stainless steel 316L : In fl uence of processing parameters10.1016/j.msea.2017.07.071 ↗
38. Fatigue properties of AlSi10Mg produced by Additive Layer Manufacturing10.1016/j.ijfatigue.2018.09.029 ↗
39. Influence of rough as-built surfaces on smooth and notched fatigue behavior of L-PBF AlSi10Mg
40. Killer notches: The effect of as-built surface roughness on fatigue failure in AlSi10Mg produced by laser powder bed fusion
41. Improving the fatigue behaviour of a selectively laser melted aluminium alloy : In fl uence of heat treatment and surface quality
42. Room- and High-Temperature Fatigue Strength of the T5 and Rapid T6 Heat-Treated AlSi10Mg Alloy Produced by Laser-Based Powder Bed Fusion10.3390/met13020263 ↗
43. Fatigue Improvement of AlSi10Mg Fabricated by Laser-Based Powder Bed Fusion through Heat Treatment10.3390/met11050683 ↗
44. Very high cycle fatigue and fatigue crack propagation behavior of selective laser melted AlSi12 alloy10.1016/j.ijfatigue.2016.06.003 ↗
45. Microstructure and mechanical properties of AlSi10Mg parts produced by the laser beam additive manufacturing (AM) technology10.1007/s13632-014-0168-y ↗
46. Mechanical properties of AlSi10Mg produced by selective laser melting10.1016/j.phpro.2012.10.059 ↗
47. A Fatigue behaviour of notched laser powder bed fusion AlSi10Mg after thermal and mechanical surface post-processing10.1016/j.msea.2021.142145 ↗