Title

Abnormal corrosion behavior of selective laser melted AlSi10Mg alloy induced by heat treatment at 300 °C

Document Type

Journal Article

Publication Title

Journal of Alloys and Compounds

Publisher

Elsevier B.V.

School

School of Engineering

RAS ID

28933

Grant Number

ARC Number : DP110101653

Comments

Originally published as: 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. Original publication available here

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.

DOI

10.1016/j.jallcom.2019.06.274

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