Numerical Simulation on Deformation Behaviour of Additively Manufactured AlSi10Mg Alloy
The deformation behaviour of additively manufactured AlSi10Mg alloy under low strains, high strain rates and elevated temperature conditions is essential to analyse and predict its response against dynamic loading such as impact and thermomechanical fatigue. The constitutive relation of Johnson-Cook is used to capture the strain rate sensitivity and thermal softening effect in AlSi10Mg alloy. Johnson-Cook failure model is widely used for exploring damage mechanics and predicting the fracture in many materials. In this present work, Johnson-Cook material and damage model parameters for additively manufactured AlSi10Mg alloy have been determined numerically from four types of uniaxial tensile test. Three different uniaxial tensile tests with dynamic strain rates (0.1, 1, 10, 50, and 100 s-1) and elevated temperature tensile test with three different temperature conditions (450 K, 500 K and 550 K) were performed on 3D printed AlSi10Mg alloy in ABAQUS/Explicit. Hexahedral elements are used to discretize tensile specimens and fracture energy value of 43.6 kN/m was used for damage initiation. Levenberg Marquardt optimization method was used for the evaluation of Johnson-Cook model parameters. It was observed that additively manufactured AlSi10Mg alloy has shown relatively higher strain rate sensitivity and lower thermal stability as compared to the other Al alloys.Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 747
 W. Li et al., “Materials Science & Engineering A Effect of heat treatment on AlSi10Mg alloy fabricated by selective laser melting : Microstructure evolution, mechanical properties and fracture mechanism,” Mater. Sci. Eng. A, vol. 663, pp. 116–125, 2016, doi: 10.1016/j.msea.2016.03.088.
 S. R. Ch, A. Raja, R. Jayaganthan, N. J. Vasa, and M. Raghunandan, “Study on the fatigue behaviour of selective laser melted AlSi10Mg alloy,” Mater. Sci. Eng. A, vol. 781, no. March, p. 139180, 2020, doi: 10.1016/j.msea.2020.139180.
 S. R. Ch, A. Raja, P. Nadig, R. Jayaganthan, and N. J. Vasa, “Influence of working environment and built orientation on the tensile properties of selective laser melted AlSi10Mg alloy,” Mater. Sci. Eng. A, vol. 750, no. October 2018, pp. 141–151, 2019, doi: 10.1016/j.msea.2019.01.103.
 L. Hitzler et al., “Fracture toughness of selective laser melted AlSi10Mg,” Proc. Inst. Mech. Eng. Part L J. Mater. Des. Appl., vol. 233, no. 4, pp. 615–621, 2019, doi: 10.1177/1464420716687337.
 A. Banerjee, S. Dhar, S. Acharyya, D. Datta, and N. Nayak, “Determination of Johnson cook material and failure model constants and numerical modelling of Charpy impact test of armour steel,” Mater. Sci. Eng. A, vol. 640, pp. 200–209, 2015, doi: 10.1016/j.msea.2015.05.073.
 A. Shrot and M. Bäker, “Determination of Johnson-Cook parameters from machining simulations,” Comput. Mater. Sci., vol. 52, no. 1, pp. 298–304, 2012, doi: 10.1016/j.commatsci.2011.07.035.
 L. Gambirasio and E. Rizzi, “An enhanced Johnson-Cook strength model for splitting strain rate and temperature effects on lower yield stress and plastic flow,” Comput. Mater. Sci., vol. 113, pp. 231–265, 2016, doi: 10.1016/j.commatsci.2015.11.034.
 N. K. Gupta, M. A. Iqbal, and G. S. Sekhon, “Experimental and numerical studies on the behavior of thin aluminum plates subjected to impact by blunt- and hemispherical-nosed projectiles,” Int. J. Impact Eng., vol. 32, no. 12, pp. 1921–1944, 2006, doi: 10.1016/j.ijimpeng.2005.06.007.
 T. Borvik, O. S. Hopperstad, T. Berstad, and M. Langseth, “A computational model of viscoplasticity and ductile damage for impact and penetration,” Eur. J. Mech. A/Solids, vol. 20, no. 5, pp. 685–712, 2001, doi: 10.1016/S0997-7538(01)01157-3.
 M. Murugesan and D. W. Jung, “Johnson cook material and failure model parameters estimation of AISI-1045 medium carbon steel for metal forming applications,” Materials (Basel)., vol. 12, no. 4, 2019, doi: 10.3390/ma12040609.
 S. Gupta, S. Abotula, and A. Shukla, “Determination of Johnson-Cook Parameters for Cast Aluminum Alloys,” vol. 136, no. July, pp. 1–5, 2014, doi: 10.1115/1.4027793.
 K. Senthil, B. Arindam, M. A. Iqbal, and N. K. Gupta, “Ballistic Response of 2024 Aluminium Plates Against Blunt Nose Projectiles,” Procedia Eng., vol. 173, pp. 363–368, 2017, doi: 10.1016/j.proeng.2016.12.030.
 R. Gumbleton, J. A. Cuenca, G. M. Klemencic, N. Jones, and A. Porch, “Evaluating the coefficient of thermal expansion of additive manufactured AlSi10Mg using microwave techniques,” Addit. Manuf., vol. 30, no. September, p. 100841, 2019, doi: 10.1016/j.addma.2019.100841.
 P. Sharma, P. Chandel, P. Mahajan, and M. Singh, “Quasi-Brittle Fracture of Aluminium Alloy 2014 under Ballistic Impact,” Procedia Eng., vol. 173, pp. 206–213, 2017, doi: 10.1016/j.proeng.2016.12.059.
 M. A. Iqbal, K. Senthil, V. Madhu, and N. K. Gupta, “Oblique impact on single, layered and spaced mild steel targets by 7.62 AP projectiles,” Int. J. Impact Eng., vol. 110, pp. 26–38, 2017, doi: 10.1016/j.ijimpeng.2017.04.011.
 L. Bin Niu, H. Takaku, and M. Kobayashi, “Tensile fracture behaviors in double-notched thin plates of a ductile steel,” ISIJ Int., vol. 45, no. 2, pp. 281–287, 2005, doi: 10.2355/isijinternational.45.281.
 Y. Bai, X. Teng, and T. Wierzbicki, “On the application of stress triaxiality formula for plane strain fracture testing,” J. Eng. Mater. Technol. Trans. ASME, vol. 131, no. 2, pp. 0210021–02100210, 2009, doi: 10.1115/1.3078390.