High-Cycle Tensile and Torsional Fatigue of AlSi10Mg Aluminum Alloy Produced by Selective Laser Alloying

Author details

Abstract

The article presents the results of cyclic and static mechanical tests for tension and torsion of samples grown in different areas using selective laser melting from ASP35 aluminum powder. The results of macro- and microstructural studies of the obtained additive aluminum alloy AlSi10Mg are presented. It is shown that in the deposited aluminum alloy array there are pores of various sizes and unfused particles of aluminum powder. Specimens for torsion and tensile tests are made from grown cylindrical blanks using the mechanical processing method. For cyclic tensile tests, a corset shape of the working part of the sample is chosen due to high sensitivity of the resulting AlSi10Mg alloy to stress concentration. Torsional fatigue tests are carried out using samples with a cylindrical working part. A series of cyclic tests is carried out in tension and torsion in the region of high-cycle fatigue in the soft loading mode under a symmetric stress cycle. Tensile and torsional fatigue curves are plotted for different orientations of the grown samples. A comparison is made of the anisotropy coefficient values of mechanical properties during tensile and torsional fatigue and the anisotropy coefficients during static tensile and torsion tests. It was found that during cyclic torsion the coefficient of anisotropy of properties is greater than during static tests and cyclic tensile tests. Based on the results of cyclic tensile tests, the endurance limit of the considered aluminum alloy is determined for all directions of the specimen growth. An analysis of the fracture surfaces of the samples after cyclic tensile tests is carried out. It has been shown that cyclic durability is most influenced by defects in the form of pores and unmelted particles of aluminum powder.

Keywords

high-cycle fatigueadditive technologiesaluminum alloyselective laser meltingtensiontorsionanisotropy coefficient of properties.

Bibliography

  1. 1.Nikitin I.S., Burago N.G., Nikitin A.D., Yakushev V.L. Deter- mination of the critical plane and assessment of fatigue durability un- der various cyclic loading regimes. PNRPU Mechanics Bulletin, 2017, no. 4, pp. 238-252. DOI: 10.15593/perm.mech/2017.4.15 Scholar
  2. 2.Burago N.G., Nikitin I.S., Nikitin A.D., Stratula B.A. The assessment of fatigue durability and critical plane determination for multiaxial cyclic loading at an arbitrary shift of phases. PNRPU Mechanics Bulletin,2019, no. 3, pp. 27-36. DOI: 10.15593/perm.mech/2019.3.03 Scholar
  3. 3.Lomakin E.V., Tretyakov M.P., Ilinykh A.V., Lykova A.V. Mechanical behavior of X15CrNi12-2 structural steel un- der biaxial low-cycle fatigue at normaland elevated tempera- tures. PNRPU Mechanics Bulletin, 2019, no. 1, pp. 77-86. DOI: 10.15593/perm.mech/2019.1.07 Scholar
  4. 4.B. Malek, C. Mabru, M. Chaussumier Fatigue behavior of 2618-T851 aluminum alloy under uniaxial and multiaxial loadings // Int. J. Fatigue. – 2022. – 131, 105322. DOI: 10.1016/j.ijfatigue.2019.105322 Scholar
  5. 5.A.S. Yankin, A.V. Lykova, A.I. Mugatarov, V.E. Wilde- mann, A.V. Ilinykh Influence of additional static stresses on biaxial low-cycle fatigue of 2024 aluminum alloy // Fracture and Struc- tural Integrity. – 2022. – Vol. 16, № 62. – pp. 180-193. Scholar
  6. 6.Igisenov B.K., Selective laser sintering of metals in addi- tive technologies / B.K.Igisenov, V.E. Kasutin, A.V. Kreymer, K.V. Viblov // BULLETIN OF CONTEMPORARY RESEARCH. – 2018. – No. 4.2 (19). – pp. 235-239. Scholar
  7. 7.Dirk Herzog, Additive manufacturing of metals / Vanessa Seyda, Eric Wycisk, Claus Emmelmann// Acta Materialia 117 (2016) 371-392 Scholar
  8. 8.T. DebRoy, H. Wei, J. Zuback, T. Mukherjee, J. Elmer, J. Milewski, A. Beese, A. Wilson-Heid, A. De, W. Zhang, Pro- gress in Materials Science 92, 112 (2018) Scholar
  9. 9.Lodha, S., Song, B., Park, SI. et al. Sustainable 3D printing with recycled materials: a review. J Mech Sci Technol 37, 5481– 5507 (2023). https://doi.org/10.1007/s12206-023-1001-9 Scholar
  10. 10.Dinin N.V., Zavodov A.V., Oglodkov M.S., Hasikov D.V. Influence of the parameters of the selective laser melting process on the structure of the aluminum alloy of the system Al- SI-MG // VIAM Proceedings. – 2017. – No. 10(58). – pp. 1–14. Scholar
Download PDF

Article information

Published
25 November 2024
Issue date
25 November 2024
Issue
No. 4 (2024)
Share