Abstract
The current study focuses on the effect of a post-heat treatment such as solutionizing at 520 °C for 0.5–2.5 h followed by artificial ageing at 165 °C for 2–14 h (T6-like heat treatment) on the microstructure and mechanical properties of selective laser melted (SLM) AlSi10Mg alloy. XRD & DSC analysis shows the Al, Si, and Mg2Si phases present in as-built and heat-treated conditions, which are well correlated with the Thermo-Calc simulation results. The density of as-built AlSi10Mg was 2.66 g/cm3, and it decreased to 2.63 g/cm3 after solutionization, and after artificial ageing, it further decreased to 2.61 g/cm3 due to the lattice strains. As-built sample microstructure consists of fine α-Al cells containing ultra-fine Si particles surrounded by a eutectic Si network due to the high heating and cooling rates involved in SLM processes. After solutionizing, the eutectic Si network structure disappeared by the thermally activated diffusion process forming Si particles in the aluminium matrix. Vickers hardness for as-built condition was 126.6 HV, and after solutionization for 30 min, it decreased to 95.6 HV. However, after subsequent artificial ageing (for 12 h), the hardness value again increased to 119.7 HV. As-built condition showed absorbed impact energy of 8 J and it increased to 17.33 J during solutionization for 0.5 h and again decreased to 9.33 J after subsequent artificial ageing.
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References
Wong KV, Hernandez A (2012) A review of additive manufacturing. ISRN Mechanical Eng 2012(2012):1–10. https://doi.org/10.5402/2012/208760
Frazier WE (2014) Metal additive manufacturing: a review. J Mater Eng Perform 23(6):1917–1928. https://doi.org/10.1007/s11665-014-0958-z
Dilberoglu UM, Gharehpapagh B, Yaman U, Dolen M (2017) The role of additive manufacturing in the era of industry 4.0. Procedia Manuf 11:545–554. https://doi.org/10.1016/j.promfg.2017.07.148
Sefene EM (2022) State-of-the-art of selective laser melting process: a comprehensive review. J Manuf Syst 63:250–274. https://doi.org/10.1016/j.jmsy.2022.04.002
Nagarajan B, Hu Z, Song X, Zhai W, Wei J (2019) Development of micro selective laser melting: the state of the art and future perspectives. Engineering 5(4):702–720. https://doi.org/10.1016/j.eng.2019.07.002
Olakanmi EO, Cochrane RF, Dalgarno KW (2015) A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders. Prog Mater Sci 74:401–477
Aboulkhair NT, Simonelli M, Parry L, Ashcroft I, Tuck C, Hague R (2019) 3D printing of aluminium alloys: additive manufacturing of aluminium alloys using selective laser melting. Prog Mater Sci 106:100578. https://doi.org/10.1016/j.pmatsci.2019.100578
Fox JC, Moylan SP, Lane BM (2016) Effect of process parameters on the surface roughness of overhanging structures in laser powder bed fusion additive manufacturing. Procedia CIRP 45:131–134. https://doi.org/10.1016/j.procir.2016.02.347
Delcuse L, Bahi S, Gunputh U, Rusinek A, Wood P, Miguelez MH (2020) Effect of powder bed fusion laser melting process parameters, build orientation and strut thickness on porosity, accuracy and tensile properties of an auxetic structure in IN718 alloy. Addit Manuf 36. https://doi.org/10.1016/j.addma.2020.101339
Aversa A et al (2019) New aluminum alloys specifically designed for laser powder bed fusion: a review. Materials 12(7). https://doi.org/10.3390/ma12071007
Read N, Wang W, Essa K, Attallah MM (2015) Selective laser melting of AlSi10Mg alloy: process optimisation and mechanical properties development. Mater Des 65:417–424. https://doi.org/10.1016/j.matdes.2014.09.044
Yang P, Deibler LA, Bradley DR, Stefan DK, Carroll JD (2018) Microstructure evolution and thermal properties of an additively manufactured, solution treatable AlSi10Mg part. J Mater Res 33(23):4040–4052. https://doi.org/10.1557/jmr.2018.405
Vora P, Mumtaz K, Todd I, Hopkinson N (2015) AlSi12 in-situ alloy formation and residual stress reduction using anchorless selective laser melting. Addit Manuf 7:12–19. https://doi.org/10.1016/j.addma.2015.06.003
Brandau B, Da Silva A, Wilsnack C, Brueckner F, Kaplan AFH (2022) Absorbance study of powder conditions for laser additive manufacturing. Mater Des 216:110591. https://doi.org/10.1016/j.matdes.2022.110591
Birol Y (2007) Microstructural evolution during annealing of a rapidly solidified Al-12Si alloy. J Alloys Compd 439(1–2):81–86. https://doi.org/10.1016/j.jallcom.2006.08.068
Alghamdi F, Song X, Hadadzadeh A, Shalchi-Amirkhiz B, Mohammadi M, Haghshenas M (2020) Post heat treatment of additive manufactured AlSi10Mg: on silicon morphology, texture and small-scale properties. Mater Sci Eng, A 783:139296. https://doi.org/10.1016/j.msea.2020.139296
Aboulkhair NT, Maskery I, Tuck C, Ashcroft I, Everitt NM (2016) The microstructure and mechanical properties of selectively laser melted AlSi10Mg: the effect of a conventional T6-like heat treatment. Mater Sci Eng, A 667:139–146. https://doi.org/10.1016/j.msea.2016.04.092
Aboulkhair NT, Tuck C, Ashcroft I, Maskery I, Everitt NM (2015) On the precipitation hardening of selective laser melted AlSi10Mg. Metall Mater Trans A PhysMetall Mater Sci 46(8):3337–3341. https://doi.org/10.1007/s11661-015-2980-7
Fousová M, Dvorský D, Michalcová A, Vojtěch D (2018) Changes in the microstructure and mechanical properties of additively manufactured AlSi10Mg alloy after exposure to elevated temperatures. Mater Charact 2017(137):119–126. https://doi.org/10.1016/j.matchar.2018.01.028
Han Q, Jiao Y (2019) Effect of heat treatment and laser surface remelting on AlSi10Mg alloy fabricated by selective laser melting. Int J Adv Manuf Technol 102(9–12):3315–3324. https://doi.org/10.1007/s00170-018-03272-y
Zhou Le et al (2018) Microstructure, precipitates and hardness of selectively laser melted AlSi10Mg alloy before and after heat treatment. Mater Charact 143:5–17
Roth CC, Tancogne-Dejean T, Mohr D (2021) Plasticity and fracture of cast and SLM AlSi10Mg: High-throughput testing and modeling. Addit Manuf 43:101998. https://doi.org/10.1016/j.addma.2021.101998
Yan Q, Song Bo, Shi Y (2020) Comparative study of performance comparison of AlSi10Mg alloy prepared by selective laser melting and casting. J Mater Sci Technol 41:199–208. https://doi.org/10.1016/j.jmst.2019.08.049
Yu X, Wang L (2018) T6 heat-treated AlSi10Mg alloys additive-manufactured by selective laser melting. Procedia Manuf 15:1701–1707. https://doi.org/10.1016/j.promfg.2018.07.265
Girelli L, Tocci M, Gelfi M, Pola A (2019) Study of heat treatment parameters for additively manufactured AlSi10Mg in comparison with corresponding cast alloy. Mater Sci Eng, A 739:317–328. https://doi.org/10.1016/j.msea.2018.10.026
Wang LF et al (2018) Enhancement in mechanical properties of selectively laser-melted AlSi10Mg aluminum alloys by T6-like heat treatment. Mater Sci Eng, A 734:299–310. https://doi.org/10.1016/j.msea.2018.07.103
Wei P et al (2021) Effect of T6 heat treatment on the surface tribological and corrosion properties of AlSi10Mg samples produced by selective laser melting. Mater Charact: 171. https://doi.org/10.1016/j.matchar.2020.110769
Maamoun AH, Elbestawi M, Dosbaeva GK, Veldhuis SC (2018) Thermal post-processing of AlSi10Mg parts produced by selective laser melting using recycled powder. Addit Manuf 21:234–247. https://doi.org/10.1016/j.addma.2018.03.014
Padovano E, Badini C, Pantarelli A, Gili F, D’Aiuto F (2020) A comparative study of the effects of thermal treatments on AlSi10Mg produced by laser powder bed fusion. J Alloys Compd 831:154822. https://doi.org/10.1016/j.jallcom.2020.154822
Baek MS, Kreethi R, Park TH, Sohn Y, Lee KA (2021) Influence of heat treatment on the high-cycle fatigue properties and fatigue damage mechanism of selective laser melted AlSi10Mg alloy. Mater Sci Eng A 819:141486. https://doi.org/10.1016/j.msea.2021.141486
Di Egidio G, Ceschini L, Morri A, Martini C, Merlin M (2022) A novel T6 rapid heat treatment for AlSi10Mg alloy produced by laser-based powder bed fusion: comparison with t5 and conventional T6 heat treatments. Metall Mater Trans B 53(1):284–303. https://doi.org/10.1007/s11663-021-02365-6
Liu Mengna et al (2022) Microstructure and mechanical property of high-power laser powder bed fusion AlSi10Mg alloy before and after T6 heat treatment. Virtual Phys Prototyping 17(4): 749–767
Lv X, Wen B, Du J (2019) Effects of heat treatment on microstructure and mechanical properties of selective laser melting IN718. XiyouJinshuCailiao Yu Gongcheng/Rare Metal Mater Eng 48(5):1386–1393
Maleki E et al (2021) Fatigue behaviour of notched laser powder bed fusion AlSi10Mg after thermal and mechanical surface post-processing. Mater Sci Eng A 829:142145. https://doi.org/10.1016/j.msea.2021.142145
Lattanzi L, Merlin M, Fortini A, Morri A, Garagnani GL (2022) Effect of thermal exposure simulating vapor deposition on the impact behavior of additively manufactured AlSi10Mg aAlloy. J Mater Eng Perform 31(4):2859–2869. https://doi.org/10.1007/s11665-021-06414-8
Roveda I, Serrano-Munoz I, Kromm A, Madia M (2021) Investigation of residual stresses and microstructure effects on the fatigue behaviour of a L-PBF AlSi10Mg alloy. Procedia Struct Integrit 2022(38):564–571. https://doi.org/10.1016/j.prostr.2022.03.057
Cabibbo M, Montanari R, Pola A, Tocci M, Varone A (2022) Mechanical spectroscopy study of as-cast and additive manufactured AlSi10Mg. J Alloys Compd 914:165361. https://doi.org/10.1016/j.jallcom.2022.165361
Maeshima T, Oh-ishi K (2019) Solute clustering and supersaturated solid solution of AlSi10Mg alloy fabricated by selective laser melting. Heliyon 5(2):e01186. https://doi.org/10.1016/j.heliyon.2019.e01186
Ghasemi A, Fereiduni E, Balbaa M, Elbestawi M, Habibi S (2022) Unraveling the low thermal conductivity of the LPBF fabricated pure Al, AlSi12, and AlSi10Mg alloys through substrate preheating. Addit Manuf 59:103148. https://doi.org/10.1016/j.addma.2022.103148
Jacob KT, Raj S, Rannesh L (2007) Vegard’s law: a fundamental relation or an approximation? ZeitschriftfuerMetallkunde/Mater Res Adv Tech 98(9):776–779. https://doi.org/10.3139/146.101545
Denton AR, Ashcroft NW (1991) Vegards law. Phys Rev A (Coll Park) 43(6):3161–3164. https://doi.org/10.1103/PhysRevA.43.3161
Milligan J, Vintila R, Brochu M (2009) Nanocrystalline eutectic Al-Si alloy produced by cryomilling. Mater Sci Eng, A 508(1–2):43–49. https://doi.org/10.1016/j.msea.2008.12.017
Lubarda VA (2003) On the effective lattice parameter of binary alloys. Mech Mater 35(1–2):53–68
Sun B, Li S, Imai H, Umeda J, Kondoh K (2012) Synthesis kinetics of Mg 2Si and solid-state formation of Mg-Mg 2Si composite. Powder Technol 217:157–162. https://doi.org/10.1016/j.powtec.2011.10.022
Patakham U, Palasay A, Wila P, Tongsri R (2021) MPB characteristics and Si morphologies on mechanical properties and fracture behavior of SLM AlSi10Mg. Mater Sci Eng A 821:141602. https://doi.org/10.1016/j.msea.2021.141602
Dong Z et al (2022) Microstructural evolution and characterization of AlSi10Mg alloy manufactured by selective laser melting. J Market Res 17:2343–2354. https://doi.org/10.1016/j.jmrt.2022.01.129
Ikeno S, Matsui H, Matsuda K, Terayama K, Uetani Y (2001) DSC measurement and HRTEM observation of precipitates in an Al-1.6 mass%Mg2Si alloy. Nippon Kinzoku Gakkaishi/J Jpn Inst Met 65(5):404–408. https://doi.org/10.2320/jinstmet1952.65.5_404
Fiocchi J, Tuissi A, Bassani P, Biffi CA (2017) Low temperature annealing dedicated to AlSi10Mg selective laser melting products. J Alloy Compd 695:3402–3409. https://doi.org/10.1016/j.jallcom.2016.12.019
Albu M, Krisper R, Lammer J, Kothleitner G, Fiocchi J, Bassani P (2020) Microstructure evolution during in-situ heating of AlSi10Mg alloy powders and additive manufactured parts. AdditManuf 36:101605. https://doi.org/10.1016/j.addma.2020.101605
Fiocchi J, Biffi CA, Colombo C, Vergani LM, Tuissi A (2020) Ad Hoc heat treatments for selective laser melted Alsi10mg alloy aimed at stress-relieving and enhancing mechanical performances. JOM 72(3):1118–1127. https://doi.org/10.1007/s11837-019-03973-z
Lasagni F, Mingler B, Dumont M, Degischer HP (2008) Precipitation kinetics of Si in aluminium alloys. Mater Sci Eng, A 480(1–2):383–391. https://doi.org/10.1016/j.msea.2007.07.008
Andersen SJ, Marioara CD, Friis J, Wenner S, Holmestad R (2018) Precipitates in aluminium alloys. Adv Phys: X 3(1):790–814. https://doi.org/10.1080/23746149.2018.1479984. Taylor and Francis Ltd.
Padovano E, Badini C, Pantarelli A, Gili F, D’Aiuto F (2020) A comparative study of the effects of thermal treatments on AlSi10Mg produced by laser powder bed fusion. J Alloys Comp 831:154822. https://doi.org/10.1016/j.jallcom.2020.154822
Zhang C, Zhu H, Liao H, Cheng Y, Hu Z, Zeng X (2018) Effect of heat treatments on fatigue property of selective laser melting AlSi10Mg. Int J Fatigue 116:513–522. https://doi.org/10.1016/j.ijfatigue.2018.07.016
Li W et al (2016) Effect of heat treatment on AlSi10Mg alloy fabricated by selective laser melting: microstructure evolution, mechanical properties and fracture mechanism. Mater Sci Eng A 663:116–125. https://doi.org/10.1016/j.msea.2016.03.088
Zhu Haowen et al (2024) Effects of post heat treatment on the microstructure and mechanical properties of selective laser melted AlSi10Mg alloys. Mater Sci Eng: A 4:146195. https://doi.org/10.1016/j.msea.2024.146195
Damon J, Dietrich S, Vollert F, Gibmeier J, Schulze V (2018) Process dependent porosity and the influence of shot peening on porosity morphology regarding selective laser melted AlSi10Mg parts. Addit Manuf 20:77–89. https://doi.org/10.1016/j.addma.2018.01.001
Bagherifard S, Beretta N, Monti S, Riccio M, Bandini M, Guagliano M (2018) On the fatigue strength enhancement of additive manufactured AlSi10Mg parts by mechanical and thermal post-processing. Mater Des 145:28–41. https://doi.org/10.1016/j.matdes.2018.02.055
Sausto F, Tezzele C, Beretta S (2012) Analysis of fatigue strength of L-PBF AlSi10Mg with different surface post-processes: effect of residual stresses. Metals (Basel) 12(6). https://doi.org/10.3390/met12060898
Schneller W, Leitner M, Pomberger S, Springer S, Beter F, Grün F (2019) Effect of post treatment on the microstructure, surface roughness and residual stress regarding the fatigue strength of selectively laser melted AlSi10Mg structures. J Manuf Mater Process 3(4):89. https://doi.org/10.3390/jmmp3040089
Zhuo L et al (2019) Effect of post-process heat treatment on microstructure and properties of selective laser melted AlSi10Mg alloy. Mater Lett 234:196–200. https://doi.org/10.1016/j.matlet.2018.09.109
Tonelli L, Liverani E, Morri A, Ceschini L (2021) Role of direct aging and solution treatment on hardness, microstructure and residual stress of the A357 (AlSi7Mg0.6) alloy produced by powder bed fusion, metallurgical and materials transactions B: process metallurgy and materials processing. Science 52(4):2484–2496. https://doi.org/10.1007/s11663-021-02179-6
Kempf A, Hilgenberg K (2021) Influence of heat treatments on AlSi10Mg specimens manufactured with different laser powder bed fusion machines. Mater Sci Eng A 818:141371. https://doi.org/10.1016/j.msea.2021.141371
Acknowledgements
Bonagiri Sai Charan and Mergoju Srikanth are grateful for the fellowship from Council of Scientific & Industrial Research (CSIR)-Senior Research Fellowship (31/GATE/20(33)/2020-EMR-I) and (31/GATE/20(32)/2020-EMR-I), respectively. All the authors are thankful to the Additive manufacturing staff for sample preparation and Central instrumentation facility staff for the characterization. CSIR-CECRI manuscript number: CECRI/PESVC/Pubs/2023-067.
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Charan, B.S., Srikanth, M., Swamy, S. et al. Analysis of phase, microstructure, and mechanical characteristics of selective laser melted AlSi10Mg alloy after post-heat treatment. Prog Addit Manuf (2024). https://doi.org/10.1007/s40964-024-00643-8
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DOI: https://doi.org/10.1007/s40964-024-00643-8