盐雾预腐蚀对增材制造AlSi10Mg合金疲劳行为影响研究

doi:10.11896/cldb.25010054

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Abstract Additive manufacturing (AM) AlSi10Mg alloy demonstrates significant potential in rail transit applications due to its design flexibility and lightweight advantages. Considering that the alloy may be affected by corrosive environments during actual service, this work investigates the effects of pre-corrosion in a 5% NaCl salt spray environment for 0 h, 64 h, 136 h, and 360 h on its microstructure, mechanical properties, and fatigue performance. The results indicate that as the pre-corrosion time increases, pits appear on the surface of the sample and gradually expand, eventually connecting to form larger areas. The pits spread faster along the surface than in depth, and this expansion stabilizes after 276 h. The surface roughness increases with corrosion time, while the hardness decreases. The yield strength, tensile strength, and elastic modulus of the samples are less affected by corrosion time, whereas fatigue performance correlates with both corrosion time and stress level. Fatigue life decreases with increasing corrosion time and stress level. The impact of pre-corrosion time on fatigue life is more pronounced at lower stress levels than at higher ones. Fracture analysis reveals that fatigue cracks initiate at defects near the surface of the samples, and corrosion enhances stress concentration at these defects, promoting crack initiation.

Key words： rail transit additive manufacturing pre-corrosion corrosion fatigue

Received: 10 May 2026 Published: Online: 2026-05-18

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	GUAN Xinlong
	HUANG Mian
	YANG Bing
	XIAO Shoune

Cite this article:

GUAN Xinlong,HUANG Mian,YANG Bing, et al. Study on the Effect of NaCl Spray Pre-corrosion on the Fatigue Behavior of Additive Manufacturing AlSi10Mg Alloy[J]. Materials Reports, 2026, 40(9): 25010054-6.

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https://www.mater-rep.com/EN/10.11896/cldb.25010054 OR https://www.mater-rep.com/EN/Y2026/V40/I9/25010054

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