Effect of Direct Aging on Corrosion Behavior of AlSi10Mg Alloy Fabricated by Laser Powder Bed Fusion
作者机构：Shanxi Key Laboratory of Controlled Metal Solidification and Precision ManufacturingSchool of Materials Science and EngineeringNorth University of ChinaTaiyuan030051China Technical CenterTaiyuan Iron and Steel(Group)Co.LtdTaiyuan030003China School of Materials Science and EngineeringTaiyuan University of Science and TechnologyTaiyuan030024China
出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)
年 卷 期：2024年第37卷第2期
页 面：266-282页
核心收录：
学科分类：08[工学] 0804[工学-仪器科学与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：This work was supported by the National Natural Science Foundation of China(No.52105409) the Fundamental Research Program of Shanxi Province(No.20210302124042) the High-level Talent Fund of North University of China(No.1101285710)
主 题：Laser powder bed fusion AlSi10Mg Direct aging Corrosion
摘 要：Effect of direct aging of 170℃on corrosion behavior of laser powder bed fused AlSi10Mg(LPBF-AlSi10Mg)was studied by microstructure analysis,electrochemical analysis and X-ray photoelectron *** results show that direct aging of 170℃has little effect on melt pool and Si cellular structure,but promotes the precipitation of nano-Si particles and releases the residual *** increasing aging time from 0 to 4 h to 24 h,the corrosion property of the LPBF-AlSi10Mg is deteriorated,which is evidenced by increased corrosion current density and decreased pitting potential and polarization *** increasing the aging time,the thickness of the oxide film formed on surface of the LPBF-AlSi10Mg *** Si content of the oxide film of the sample aging for 4 h is the lowest,9.42 at.%,and it is the highest,18.62 at.%,for the sample aging for 24 *** electrochemical noise analysis reveals that the middle-frequency contribution of the Hilbert spectrum is responsible for the deteriorated corrosion performance,which corresponds to metastable pitting initiated by nano-Si particles.
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