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Microstructure evolution and thermal properties of an additively manufactured, solution treatable AlSi10Mg part

  • Pin Yang (a1), Lisa A. Deibler (a1), Donald R. Bradley (a1), Daniel K. Stefan (a1) and Jay D. Carroll (a1)...

Abstract

Because of rapid solidification involved in the laser or e-beam based additive manufacturing (AM) process, solution treatable metallic parts made by these methods usually possess a unique nonequilibrium microstructure which changes significantly during subsequent thermal treatment. Such evolution alters the size, morphology, length scale, and distribution of microstructural features and has a substantial impact on thermal properties and possibly on electrical properties as well. This study focuses on effects of microstructural evolution on thermal properties of an additively manufactured AlSi10Mg part. The changes of thermal properties such as thermal expansion, heat capacity, thermal diffusivity, and thermal conductivity as a function of thermal treatment are reported. The results show that the formation of supersaturated primary α aluminum and unique cellular structure imparted by fast solidification in the AM process are the major cause for the low thermal diffusivity and low thermal conductivity observed in this solution treatable, as-built part. A correlation between microstructural evolution and changes in thermal properties is established. Advantages and tailoring of the thermal properties of additively built parts are discussed. Implications of these results are important for other additively manufactured components based on popular solution treatable alloys.

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Copyright

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

Corresponding author

a)Address all correspondence to this author. e-mail: pyang@sandia.gov

References

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1.Shivkumar, S., Ricci, S. Jr., Keller, C., and Apelian, D.: Effect of solution treatment parameters on tensile properties of cast aluminum alloys. J. Heat Treat. 8, 63 (1990).
2.Pedersen, L. and Arnberg, L.: The effect of solution heat treatment and quenching rates on mechanical properties and microstructure in AlSiMg foundry alloys. Mater. Metall. Eng. 32, 525 (2001).
3.Zhang, D.L., Zheng, L.H., and John, D.H.S.: Effect of a short solution treatment time on microstructure and mechanical properties of modified Al–7 wt% Si–0.3 wt% Mg alloy. J. Light Met. 2, 27 (2002).
4.Murr, L.E.: Metallurgy of additive manufacturing: Examples from electron beam melting. Addit. Manuf. 5, 40 (2015).
5.Murray, J.L. and McAlister, A.J.: The Ai–Si (aluminum–silicon) system. Bull. Alloy Phase Diagrams 5, 74 (1984).
6.Vora, P., Mumtaz, K., Todd, I., and Hopkinson, N.: AlSi10 in situ alloy formation and residual stress reduction using anchorless selective laser melting. Addit. Manuf. 7, 12 (2015).
7.Brandl, E., Heckenberger, U., Holzinger, V., and Cuchbinder, D.: Additive manufactured AlSi10Mg samples using selective laser melting (SLM): Microstructure, high cycle fatigue and fracture behavior. Mater. Des. 34, 159 (2012).
8.Caceres, C.H., Davidson, C.J., Griffiths, J.R., and Wang, Q.G.: The effect of Mg on the microstructure and mechanical behavior of Al–Si–Mg casting alloys. Metall. Mater. Trans. A 20, 2611 (1999).
9.Jacobs, M.H.: The structure of the metastable precipitates formed during aging of an Al–Mg–Si alloy. Philos. Mag. 26, 1 (1972).
10.Wahi, R.P. and von Heimendahl, M.: On the occurrence of the metastable phase β″ on Al–Si–Mg alloys. Phys. Status Solidi A 24, 607 (1974).
11.Andersen, S.J.: Quantification of the Mg2Si β″ and β′ phases in AlMgSi alloys by transmission electron microscopy. Metall. Mater. Trans. A 26, 1931 (1995).
12.Matsuda, K., Naoi, T., Fujii, K., Uetani, Y., Sato, T., Kamio, A., and Ikeno, S.: Crystal structure of the β″ phase in an Al–1.0 mass% Mg2Si–0.4 mass% Si alloy. Mater Sci. Eng., A 262, 232 (1999).
13.Holesinger, T.G., Carpenter, J.S., Lienert, T.J., Paterson, B.M., Papin, P.A., Swenson, H., and Cordes, N.L.: Characterization of an aluminum alloy hemispherical shell fabricated via direct metal laser melting. JOM 68, 1000 (2016).
14.Yang, P., Rodriguez, M.A., Deibler, L.A., Jared, B.H., Griego, J., Kilgo, A., Allen, A., and Stefan, D.K.: Effect of thermal annealing on microstructure evolution and mechanical behavior of an additive manufactured AlSi10Mg part. J. Mater. Res. 33, 1701 (2018).
15.Bose, S.K. and Kumar, R.: Structure of rapidly solidified aluminum–silicon alloys. J. Mater. Sci. 8, 1795 (1973).
16.Prashanth, K.G., Scudino, S., Klauss, H.J., Surreddi, K.B., Lober, L., Wang, Z., Chaubey, A.K., Kuhn, U., and Eckert, J.: Microstructure and mechanical properties of Al–12Si produced by selective laser melting: Effect of heat treatment. Mater. Sci. Eng., A 590, 153 (2014).
17.Martens, A., Dedry, O., Deuter, D., Rigo, O., and Lecomtebeckers, J.: Thermal treatment of AlSi10Mg processed by laser beam melting. In Proceeding of the 6th International Solid Freeform Fabrication Symposium, Bourell, D., ed. (University of Texas Press, Austin, TX, 2015); p. 1007.
18.Yan, C., Hao, L., Hussein, A., Young, P., Huang, J., and Zhu, W.: Microstructure and mechanical properties of aluminum alloy cellular lattice structure manufactured by direct metal laser sintering. Mater. Sci. Eng., A 628, 238 (2015).
19.Brito, C., Reinhart, G., Nguyen-Thi, H., Mangelinck-Noel, N., Cheung, N., Spinelli, J.E., and Garcia, A.: High cooling rate cells, dendrites, microstructural spacing and microhardness in directionally solidified Al–Mg–Si alloy. J. Alloy. Comp. 636, 145 (2015).
20.Aboulkhair, N.T., Tuck, C., Ashcroft, I., Maskery, I., and Everit, N.M.: On the precipitation hardening of selective laser melted AlSi10Mg. Metall. Mater. Trans. A 46, 3337 (2015).
21.Thijs, L., Kempen, K., Kruth, J-P., and Van Humbeeck, V.: Fine-structured aluminum products with controllable texture by selective laser melting of pre-alloyed AlSi10Mg powder. Acta Mater. 61, 1421 (2013).
22.Takata, N., Kodaira, H., Sekizawa, K., Suzuki, A., and Kobashi, M.: Change in microstructure of selectively laser melted AlSi10Mg alloy with heat treatment. Mater. Sci. Eng., A 704, 218 (2017).
23.Fiocchi, J., Tuissi, A., Bassani, P., and Biffi, C.A.: Low temperature annealing dedicated to AlSi10Mg selective laser melting products. J. Alloy. Comp. 695, 3402 (2017).
24.Li, W., Li, S., Liu, J., Zhang, A., Zhou, Y., Wei, Q., Yan, C., and Shi, Y.: Effect of heat treatment on AlSi10Mg alloy fabricated by selective laser melting: Microstructure evolution, mechanical properties and fracture mechanism. Mater. Sci. Eng., A 663, 116 (2016).
25.Kittel, C.: Introduction to Solid State Physics, 5th ed. (John Wiley & Son, Inc., New York, New York, 1976); pp. 126, 146.
26.Chase, M.W. Jr.: NIST-JANAF thermochemical tables, 4th ed. J. Phys. Chem. Ref. Data, Monograph 9, 59 (1998).
27.Hidnert, P. and Krider, H.S.: Thermal expansion of aluminum and some aluminum alloys. J. Res. Natl. Bur. Stand. 48, 2308 (1952).
28.Ho, C.Y., Powell, R.W., and Liley, P.E.: Thermal conductivity of the elements. J. Phys. Chem. Ref. Data 1, 279 (1972).
29.Butta, I. and Allen, S.M.: A Calorimetric study of precipitation in commercial aluminum alloy 6061. J. Mater. Sci. Lett. 10, 32 (1991).
30.Daoudi, M.I., Triki, A., and Redjaimia, A.: DSC study of the kinetic parameters of the metastable phases formation during non-isothermal annealing of an Al–Si–Mg alloy. J. Therm. Anal. Calorim. 104, 627 (2011).
31.Baoudi, M.I., Triki, A., Redjaimia, A., and Yamina, C.: The determination of the activation energy varying with the precipitated fraction of β″ metastable phase in an Al–Si–Mg alloy, using non-isothermal dilatometry. Thermochim. Acta 577, 5 (2014).
32.Fousova, M., Dvorsky, D., Michalcova, A., and Vojtech, D.: Changes in the microstructure and mechanical properties of additively manufactured AlSi10Mg alloy after exposure to elevated temperature. Mater. Charact. 137, 119 (2018).
33.Meyers, M.A. and Chawla, K.K.: Mechanical Metallurgy Principles and Applications, Chapter 10.3 Interactions of Solute Atoms with Dislocations (Prentice-Hall, Englewood Cliffs, New Jersey, 1984); pp. 387391.
34.Kempen, K., Thijs, L., Van Humbeeck, J., and Kruth, J-P.: Mechanical properties of AlSi10Mg produced by selective laser melting. Phys. Procedia 39, 439 (2012).
35.Marola, S., Manfredi, D., Fiore, G., Poletti, M.G., Lombardi, M., Fino, P., and Battezzati, L.: A comparison of selective laser melting with bulk rapid solidification of AlSi10Mg alloy. J. Alloy. Comp. 742, 271 (2018).
36.Kingery, W.D., Bowen, H.K., and Uhlmann, D.R.: Introduction of Ceramics, 2nd ed., Chapter 12 Thermal Properties (John Wiley & Sons, New York, NY, 1976); pp. 621624.
37.Jordovic, B., Nedeljkovic, B., Mitrovic, N., Zivanic, J., and Maricic, A.: Effect of heat treatment on structural changes in metastable AlSi10Mg alloy. J. Min. Metall., Sect. B 50, 133 (2014).
38.Brandt, B. and Neuer, G.: Electrical resistivity and thermal conductivity of pure aluminum and aluminum alloys up to and above the melting temperature. Int. J. Thermophys. 28, 1429 (2007).

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