Microstructure, Mechanical Properties and Fatigue Behavior of AlSi10Mg: an Additive Manufacturing Material

  • Authors

    • Muhamad Aqil Azri
    • Mohd Shamil Shaari
    • Ahmad Kamal Ariffin
    • Shahrum Abdullah
    https://doi.org/10.14419/ijet.v7i3.17.21895

  • The additive manufacturing using direct metal laser sintering (DMLS) is currently gaining interest among researchers. This is due to its potential to improve the manufacturing process in the aerospace and automotive industries. This paper aims to analyse the mechanical properties, microstructure and fatigue behaviour for both conditions, as-built and heat-treated (T6). The microstructure of the as-built specimen shows ultra-fine grain boundaries whereas the heat-treated specimen showing homogenous and coarsened microstructure. The ultimate tensile strength for the as-built specimen is 392 MPa whilst the heat-treated (T6) specimen is recorded at 287 MPa. The heat-treated specimen exhibiting a significant improvement in fatigue life in all range of stresses compared to as-built during fatigue testing. Hence, the heat-treatment does improve the material characteristics as well as the fatigue behaviour. Nonetheless, more researches are needed to enhance the integrity of the AlSi10Mg produced by additive manufacturing.

  • References

    1. [1] D. C. Hofmann, et al., "Developing Gradient Metal Alloys through Radial Deposition Additive Manufacturing," Scientific Reports (4) 5357 (2014).

      [2] V. Matilainen, et al., "Characterization of Process Efficiency Improvement in Laser Additive Manufacturing," Physics Procedia (56) 317-326 (2014).

      [3] P. Promoppatum, et al., "Numerical and Experimental Investigations of Micro and Macro Characteristics of Direct Metal Laser Sintered Ti-6Al-4V products," Journal of Materials Processing Technology (2016).

      [4] G. Kasperovich and J. Hausmann, "Improvement of fatigue resistance and ductility of TiAl6V4 processed by selective laser melting," Journal of Materials Processing Technology (220) 202-214, 6 ( 2015).

      [5] D. Greitemeier, et al., "Fatigue performance of additive manufactured TiAl6V4 using electron and laser beam melting," International Journal of Fatigue (2016).

      [6] A. Riemer, et al., "On the fatigue crack growth behavior in 316L stainless steel manufactured by selective laser melting," Engineering Fracture Mechanics (120) 15-25, 4 (2014).

      [7] I. Rosenthal, et al., "Strain rate sensitivity and fracture mechanism of AlSi10Mg parts produced by Selective Laser Melting," Materials Science and Engineering: A (682) 509-517 (2017).

      [8] X. Zhao, et al., "Selective laser melting of carbon/AlSi10Mg composites: Microstructure, mechanical and electronical properties," Journal of Alloys and Compounds (665) 271-281( 2016).

      [9] N. T. Aboulkhair, et al., "The microstructure and mechanical properties of selectively laser melted AlSi10Mg: The effect of a conventional T6-like heat treatment," Materials Science and Engineering: A (667) 139-146 (2016).

      [10] E. Brandl, et al., "Additive manufactured AlSi10Mg samples using Selective Laser Melting (SLM): Microstructure, high cycle fatigue, and fracture behavior," Materials & Design (34) 159-169 (2012).

      [11] M. S. Shaari, et al., "Prediction of fatigue crack growth for semi-elliptical surface cracks using S-version fem under tension loading," Journal of Mechanical Engineering and Sciences (10) 2375-2386 (2016).

      [12] M. R. M. Akramin, et al., "Surface crack analysis under cyclic loads using probabilistic S-version finite element model," Journal of the Brazilian Society of Mechanical Sciences and Engineering (37) 1851-1865 (2015).

      [13] L. Thijs, et al., "Fine-structured aluminium products with controllable texture by selective laser melting of pre-alloyed AlSi10Mg powder," Acta Materialia (61) 1809-1819 (2013).

      [14] D. Manfredi, et al., "From Powders to Dense Metal Parts: Characterization of a Commercial AlSiMg Alloy Processed through Direct Metal Laser Sintering," Materials (6) 856 (2013).

      [15] T. M. Mower and M. J. Long, "Mechanical behavior of additive manufactured, powder-bed laser-fused materials," Materials Science and Engineering: A (651) 198-213 (2016).

      [16] C. R. Brooks and A. Choudhury, Failure Analysis of Engineering Materials: McGraw-Hill Education (2002).

      [17] N. T. Aboulkhair, I. Maskery , C. Tuck , I. Ashcroft and N.M. Everitt, "Improving the fatigue behaviour of a selectively laser melted aluminium alloy: Influence of heat treatment and surface quality," Materials & Design, (104) (2002).

      [18] J. McMillan and R. Hertzberg, "Application of electron fractography to fatigue studies," in Electron Fractography, ed: ASTM International (1968).

      [19] E. Wycisk, A. Solbach, S. Siddique, D. Herzog, F. Walther and C. Emmelmann, "Effects of Defects in Laser Additive Manufactured Ti-6Al-4V on Fatigue Properties," Physics Procedia (56) 371-378 (2014).

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  • How to Cite

    Azri, M. A., Shaari, M. S., Ariffin, A. K., & Abdullah, S. (2018). Microstructure, Mechanical Properties and Fatigue Behavior of AlSi10Mg: an Additive Manufacturing Material. International Journal of Engineering & Technology, 7(3.17), 186-190. https://doi.org/10.14419/ijet.v7i3.17.21895