Corrosion Behavior of Selective Laser Melted AlSi10Mg Alloy in NaCl Solution and Its Dependence on Heat Treatment

This work investigates the corrosion behavior of AlSi10Mg alloy produced by selective laser melting (SLM) and the counterparts heat-treated at 450–550 °C in 3.5 wt% NaCl solution. Electrochemical measurements and weight loss tests together with microstructural characterizations were conducted. The S...

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Bibliographic Details
Published in:Acta metallurgica sinica : English letters 2020-03, Vol.33 (3), p.327-337
Main Authors: Gu, Xin-Hui, Zhang, Jun-Xi, Fan, Xiao-Lei, Zhang, Lai-Chang
Format: Article
Language:English
Subjects:
Alloys
Aluminum base alloys
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cooling
Corrosion and Coatings
Corrosion resistance
Epoxy resins
Heat treatment
Laser beam melting
Lasers
Materials Science
Mechanical properties
Metallic Materials
Microstructure
Morphology
Nanotechnology
Organometallic Chemistry
Particle size
Residual stress
Sodium chloride
Spectroscopy/Spectrometry
Temperature
Tribology
Weight loss measurement
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Summary:This work investigates the corrosion behavior of AlSi10Mg alloy produced by selective laser melting (SLM) and the counterparts heat-treated at 450–550 °C in 3.5 wt% NaCl solution. Electrochemical measurements and weight loss tests together with microstructural characterizations were conducted. The SLM-produced alloy displays a microstructure with a continuous network of Si particles, exhibiting superior corrosion behavior. After heat treatment, the Si particles are coarsened and isolated and Al matrix dissolves into their surrounding area, thereby degrading the corrosion resistance properties. Therefore, the corrosion resistance of AlSi10Mg alloy degrades with increasing the heat treatment temperature.
ISSN:1006-7191
2194-1289
DOI:10.1007/s40195-019-00903-5