{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,21]],"date-time":"2026-03-21T21:31:37Z","timestamp":1774128697608,"version":"3.50.1"},"reference-count":37,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2025,8,25]],"date-time":"2025-08-25T00:00:00Z","timestamp":1756080000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Metals"],"abstract":"<jats:p>AlSi10Mg has been one of the most studied and employed aluminum alloys for additive manufacturing via laser powder-bed fusion (L-PBF). The optimization of manufacturing parameters is important for reducing internal defects, including porosity and inadequate surface finishes. In addition, heat treatments, such as T6, are often applied to this alloy, but they degrade the characteristic microstructure obtained via L-PBF additive manufacturing\u2014the fine cellular structures\u2014which may, in turn, detrimentally affect the material\u2019s properties. In this context, a new alternative to this treatment, direct aging (DA), has shown promise in improving the mechanical properties of AlSi10Mg parts produced via L-PBF, since it preserves the cellular microstructure, precipitating silicon-rich nanoparticles within the cells. Understanding how different temperatures and heat treatment times influence the microstructure and, consequently, the properties remains a field to be explored in order to optimize the treatment conditions and achieve better mechanical properties. Thus, the objective of this study was to evaluate the influence of manufacturing parameters and heat treatments on the microstructure and mechanical properties of AlSi10Mg alloy. The optimized manufacturing conditions were 300 W power, 800 mm\/s scan speed, 30 \u00b5m layer thickness, and an argon atmosphere, which led to lower porosity and better finishing. Samples were heat-treated via DA at 150 \u00b0C and 170 \u00b0C for different times, as well as undergoing a T6 treatment (solution at 520 \u00b0C followed by aging at 150 \u00b0C and 170 \u00b0C). Initially, the aging curves show higher hardness values for the direct aging condition, compared to the T6 and as-built conditions, reaching a peak hardness of 195 HV for 6h of direct aging. In this way, it was followed with microstructural characterization, which demonstrated that DA maintained the fine cell microstructure of L-PBF and promoted the precipitation of Si nanoparticles, which certainly contributed to the increase in hardness compared to T6, which promoted a structure with coarser precipitates. DA at 170 \u00b0C for 6 h increased the tensile strength to 430 MPa, compared to the as-built condition, with a slight loss of ductility.<\/jats:p>","DOI":"10.3390\/met15090941","type":"journal-article","created":{"date-parts":[[2025,8,26]],"date-time":"2025-08-26T06:26:31Z","timestamp":1756189591000},"page":"941","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["The Influence of Manufacturing Parameters and Heat Treatments on the Properties of AlSi10Mg Alloy Produced Using L-PBF"],"prefix":"10.3390","volume":"15","author":[{"given":"Gleicy de Lima Xavier","family":"Ribeiro","sequence":"first","affiliation":[{"name":"Senai Institute of Innovation in Advanced Manufacturing, 330 Vit\u00f3ria Maria M\u00e9dice Ramos Street, S\u00e3o Bernardo do Campo 09861-790, SP, Brazil"},{"name":"Institute of Energy and Nuclear Research, 2242 Professor Lineu Prestes Avenue, Butant\u00e3, S\u00e3o Paulo 05508-000, SP, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9848-9569","authenticated-orcid":false,"given":"Luis","family":"Reis","sequence":"additional","affiliation":[{"name":"IDMEC, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1 Rovisco Pais Street, 1049-001 Lisboa, Portugal"}]},{"given":"Rene","family":"de Oliveira","sequence":"additional","affiliation":[{"name":"Institute of Energy and Nuclear Research, 2242 Professor Lineu Prestes Avenue, Butant\u00e3, S\u00e3o Paulo 05508-000, SP, Brazil"}]},{"given":"Marcos","family":"Massi","sequence":"additional","affiliation":[{"name":"Engeneering School, Mackenzie Presbyterian University, 930 Consola\u00e7\u00e3o Street, Consola\u00e7\u00e3o, S\u00e3o Paulo 01302-907, SP, Brazil"}]},{"given":"Rodolfo Luiz","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"Engeneering School, Mackenzie Presbyterian University, 930 Consola\u00e7\u00e3o Street, Consola\u00e7\u00e3o, S\u00e3o Paulo 01302-907, SP, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1503-1582","authenticated-orcid":false,"given":"Ant\u00f4nio Augusto","family":"Couto","sequence":"additional","affiliation":[{"name":"Institute of Energy and Nuclear Research, 2242 Professor Lineu Prestes Avenue, Butant\u00e3, S\u00e3o Paulo 05508-000, SP, Brazil"},{"name":"Engeneering School, Mackenzie Presbyterian University, 930 Consola\u00e7\u00e3o Street, Consola\u00e7\u00e3o, S\u00e3o Paulo 01302-907, SP, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2025,8,25]]},"reference":[{"key":"ref_1","unstructured":"Andr\u00e9, M., Carlos, C., Carlos, A., Jonas, C., Jorge, S., Jos\u00e9, F., Milton, L., and Volpato, N. 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