The efficiency of tumble finishing as a final post-treatment for fatigue enhancement of notched laser powder bed fusion AlSi10Mg

Maleki, Erfan; Bagherifard, Sara; Ünal, Okan; Revuru, Manoj; Bandini, Michele; Guagliano, Mario

doi:10.1038/s41598-023-30660-6

Cited by 11 publications

(2 citation statements)

References 62 publications

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“…In recent studies, it has been observed that the formation of surface nanocrystallization, superior microstructure and mechanical performance with the effect of deformation has resulted in a positive change in corrosion. In this study, the formation of surface nanocrystallization with increase in deformation and the effective reduction of surface roughness, especially in additive manufacturing samples, have positively affected the corrosion performance [25,[44][45][46][47][48][49].…”

Section: Corrosion Resistancementioning

confidence: 86%

Effects of Laser Shock Peening on Corrosion Resistance of Additive Manufactured AlSi10Mg

et al. 2023

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Mechanical properties of Al alloys make them an ideal candidate for different sections of marine, aerospace, automotive, etc. industries. Recently taking the advantages of additive manufacturing (AM), many complex infrastructures/components can be fabricated with very high design freedom via Al alloys. Although Al alloys have good natural corrosion resistance, however improving this property attracts lots of attention in the past few years. Post-processing methods can play a key role for addressing the issues related to internal and surface anomalies associated with as-built AM parts. Generally, these anomalies have detrimental effects on mechanical properties. In the present study, the effect of laser shock peening (LSP) treatment with different laser pulse overlaps and energies was investigated comprehensively on microstructure, surface texture, porosity, hardness, residual stresses as well as corrosion resistance of laser powder bed fused (L-PBF) AlSi10Mg samples. LSP provides strain deformation on the surface, and the deformation enhances by laser beam energy. LSP1 (laser energy of 1.5 J and 50% overlap) and LSP3 (laser energy of 4.5 J and 50% overlap) introduce maximum local strain of 7.5 and 10.7, respectively. The surface roughness of as-built state µm in terms of Rv was effectively diminished to 16.33 after LSP6 (laser energy of 4.5 J and 75% overlap). The results indicated that due to the modified surface texture, improved hardness and induced high compressive residual stresses in the surface layer. (surface hardness improvement and inducing high surface compressive residual stresses were obtained after LSP6 up to 26% and −289 MPa, respectively); the LSP treated samples exhibited higher corrosion resistance with the corrosion rate decreasing down to 50% as compared to the as-built state.

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Section: Corrosion Resistancementioning

confidence: 86%

Effects of Laser Shock Peening on Corrosion Resistance of Additive Manufactured AlSi10Mg

et al. 2023

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“…For instance, Wu et al [24] employed SP as a pretreatment method in conjunction with carburization treatment to improve the fatigue performance of heavy-duty gears. Maleki et al [25] utilized SP as a post-treatment method in a combined process to mitigate the negative effects of defects on the fatigue performance of AlSi10Mg samples. Croccolo et al [26] implemented SP as a post-processing method, demonstrating its capacity to boost the fatigue strength of 15-5 PH stainless steel, approaching levels achieved by forging processes.…”

Section: Introductionmentioning

confidence: 99%

The effect of shot peening on the contact fatigue performance of C40 steel gears after laser surface melting

Lv,

Cui,

Sun

et al. 2024

Surf. Topogr.: Metrol. Prop.

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In this paper, shot peening (SP) was employed as a post-processing technique for the laser surface melted (LSMed) gear. The aim was to improve the contact fatigue performance of laser surface melting+shot peened (LSMSPed) gears. The microstructure, surface roughness, residual stress, microhardness of C40 steel gears before and after SP treatment were characterized using scanning electron microscopy, X-ray diffraction stress analyzer, contour measuring instrument, and hardness tester. Fatigue test of gear was carried out with a Forschungsstelle für Zahnräder und Getriebebau (FZG) testing machine. Following the laser surface melting (LSM) treatment, a molten layer was observed on the gear teeth surface. The experimental results indicated that SP induced a hardened layer with a certain thickness and plastic deformation on the surface of LSMed gears. Importantly, as the SP parameters increased, there's a corresponding reduction in both the average grain diameter and the maximum grain diameter. The reduction was most pronounced when the shot diameter reached its maximum value. It's worth noting that once the optimal threshold for SP parameters is surpassed, the residual compressive stress and microhardness on the LSMSPed gear surface do not exhibit a continuous growth trend. Furthermore, the rise in SP parameters resulted in a gradual increase in the surface roughness of LSMSPed gears, albeit to varying degrees. In light of the combined effects of grain refinement, residual compressive stress, microhardness, and surface roughness, the contact fatigue performance of LSMSPed gears improved with increasing SP parameters. Notably, when comparing the contact fatigue life of LSMed gears with that of LSMSPed gears, we observed a substantial enhancement. However, it's essential to highlight that when the shot diameter reaches its maximum value, the contact fatigue life of the LSMSPed gear, somewhat unexpectedly, decreased.

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Assessing the Process-Property Relationship in Laser Powder Bed Fusion of AlSi10Mg Using Kalman Filter-Based Machine Learning Algorithms

Mishra,

Jatti,

Sefene

2024

J. of Materi Eng and Perform

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The efficiency of tumble finishing as a final post-treatment for fatigue enhancement of notched laser powder bed fusion AlSi10Mg

Cited by 11 publications

References 62 publications

Effects of Laser Shock Peening on Corrosion Resistance of Additive Manufactured AlSi10Mg

Effects of Laser Shock Peening on Corrosion Resistance of Additive Manufactured AlSi10Mg

The effect of shot peening on the contact fatigue performance of C40 steel gears after laser surface melting

Assessing the Process-Property Relationship in Laser Powder Bed Fusion of AlSi10Mg Using Kalman Filter-Based Machine Learning Algorithms

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