Microstructure evolution and mechanical properties of multiple-layer laser cladding coating of 308L stainless steel

Li, Kaibin; Liu, Dong; Liu, Dongyu; Pei, Guangyu; Sun, Ling

doi:10.1016/j.apsusc.2015.02.171

Cited by 124 publications

(37 citation statements)

References 17 publications

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“…To make it clear, Table 2 lists the data of the UTS, YS 0.2 and elongation of AISI 420 SS coating developed in this study, and is compared with other Fe-based SS coatings from the literature, prepared by the laser cladding technique [10,12,[18][19][20]. It can be easily concluded that the as-tempered AISI 420 SS coating in this work exhibited a striking combination of high strength and high ductility.…”

Section: Mechanical Propertiesmentioning

confidence: 92%

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Effects of Low-Temperature Tempering on Microstructure and Properties of the Laser-Cladded AISI 420 Martensitic Stainless Steel Coating

Zhu

et al. 2018

Coatings

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Post-treatment is crucial to improve the comprehensive performance of laser-cladded martensitic stainless steel coatings. In this work, a low-temperature tempering treatment (210 °C), for the first time, was performed on the laser-cladded AISI 420 martensitic stainless steel coating. The microstructure and properties of the pre- and post-tempering specimens were carefully investigated by XRD, SEM, TEM, a micro-hardness tester, a universal material testing machine and an electrochemical workstation. The results show that the as-cladded AISI 420 stainless steel coating mainly consisted of martensite, austenite, Fe3C and M23C6 carbides. The phase constituent of the coating remained the same, however, the martensite decomposed into finer tempered martensite with the precipitation of numerous nano-sized Fe3C carbides and reverted austenite in the as-tempered specimen. Moreover, a slight reduction was found in the micro-hardness and tensile strength, while a significant increase in elongation was achieved after tempering. The fractography showed a transition from brittle fracture to ductile fracture accordingly. The as-tempered coating exhibited a striking combination of mechanical properties and corrosion resistance. This work can provide a potential strategy to enhance the overall properties of the laser-deposited Fe-based coating for industrial applications.

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Section: Mechanical Propertiesmentioning

confidence: 92%

“…Schaeffler diagrams have been widely utilized to predict the solidification mode of laser cladding metals [10]. The chemical composition of the alloying elements excluding Fe can be simplified by using chromium equivalent (Cr eq ) and nickle equivalent (Ni eq ), known as Schaeffler equivalent formulas [10]:…”

Section: Phase Analysismentioning

confidence: 99%

Effects of Low-Temperature Tempering on Microstructure and Properties of the Laser-Cladded AISI 420 Martensitic Stainless Steel Coating

Zhu

et al. 2018

Coatings

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“…4a, the growth direction of some CuMg 2 dendrites is found to be towards the substrate. The formation of steering CuMg 2 dendrites is due to the change direction of the temperature gradient, which resulted from contacting the blown argon gas at the top of the coating during solidification [24].…”

Section: Methodsmentioning

confidence: 99%

The effect of Cu rejection in laser forming of AlCoCrCuFeNi/Mg composite coating

et al. 2016

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“…Besides, Figure 3 also depicts that the growth direction of some CuMg 2 dendrites is found to be towards the substrate. The formation of steering CuMg 2 dendrites could be explained in terms of the change direction of the temperature gradient, which resulted from contacting the substrate during solidification [10]. Moreover, the different growth morphologies of the formed CuMg 2 dendrites are also found within the composite layer (Figures 4).…”

Section: Methodsmentioning

confidence: 99%

Growth Morphology of CuMg2 in Laser Forming of AlCoCrCuFeNi Coating on Mg

Guo¹,

Liu²,

Qiu³

et al. 2018

Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)

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Abstract-The AlCoCrCuFeNi high-entropy alloy coating was fabricated on pure magnesium by means of laser cladding using a direct blown powder method. The formed coating is composed of two different layers, i.e., a lower composite layer consisting of some partially melted HEA particles in a mixture of Mg and a top HEA coating. Also, some Cu was rejected into the substrate melt during the processing, resulting in the formation of CuMg 2 dendrites. Moreover, the dendritic structure of the CuMg 2 phase, which shows a faceted interface at low growth rates, is shown to undergo a transition from a faceted to non-faceted interface at relatively higher growth velocities. The change in solidification behavior of the formed CuMg 2 phase is likely to be due to the undercooling increase resulting from the solidification velocity increasing.

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Microstructure evolution and mechanical properties of multiple-layer laser cladding coating of 308L stainless steel

Cited by 124 publications

References 17 publications

Effects of Low-Temperature Tempering on Microstructure and Properties of the Laser-Cladded AISI 420 Martensitic Stainless Steel Coating

Effects of Low-Temperature Tempering on Microstructure and Properties of the Laser-Cladded AISI 420 Martensitic Stainless Steel Coating

The effect of Cu rejection in laser forming of AlCoCrCuFeNi/Mg composite coating

Growth Morphology of CuMg2 in Laser Forming of AlCoCrCuFeNi Coating on Mg

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