Abnormal corrosion behavior of selective laser melted AlSi10Mg alloy induced by heat treatment at 300 °C
Abstract
Heat treatment is often employed to control the mechanical properties of selective laser melted (SLMed) AlSi10Mg, which also alters its microstructure and corrosion resistance. Therefore, a SLMed AlSi10Mg alloy was heat treated at 300 °C and 400 °C for 2 h to investigate its microstructural evolution and corrosion behavior. Abnormal corrosion behavior is observed in the sample heat treated at 300 °C. Heat treatment destroys the cellular Si network in the microstructure of the SLMed AlSi10Mg sample and promotes the formation of extremely fine Si particles; in contrast, such a microstructure cannot form a protective film on the surface of the sample, which leads to rapid corrosion along the cracked Si network inward to the inner Al matrix without the microgalvanic effect.
Document Type
Journal Article
Date of Publication
2019
Publication Title
Journal of Alloys and Compounds
Publisher
Elsevier BV
School
School of Engineering
RAS ID
28933
Grant Number
ARC Number : DP110101653
Copyright
subscription content
Comments
Gu, X., Zhang, J., Fan, X., Dai, N., Xiao, Y., & Zhang, L. (2019). Abnormal corrosion behavior of selective laser melted AlSi10Mg alloy induced by heat treatment at 300° C. Journal of Alloys and Compounds, 803, 314-324. Available here