Improving corrosion resistance of selective laser melted 316L stainless steel through ultrasonic severe surface rolling

Sun, Jiapeng; Sun, Qisheng; Liu, Ying; Li, Bangjun; Zhang, Zheng; Xu, Bingqian; Xu, Shijie; Han, Ying; Qiao, Yanxin; Han, Jing; Wu, Guosong; Chu, Paul K.

doi:10.1016/j.jmrt.2022.09.011

Cited by 20 publications

(3 citation statements)

References 60 publications

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“…In general, a nobler pitting potential is regarded as the indicator of a more stable and protective passive film forming on the SS surface. [ 10 ] As can be seen from Figure 1, the 304 SS samples exhibit a passive zone followed by a breakdown in the passivity. The 304 SS specimen shows a wide passivation region at 25°C, which indicates a stable passive film formed on the surface of 304 SS.…”

Section: Resultsmentioning

confidence: 99%

Study on the passive behavior of 304 stainless steel under temperature variation

Liu,

Sui,

Zhang

et al. 2024

Materials & Corrosion

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In this paper, the passive behavior of 304 stainless steel (SS) in NaCl solution is studied by electrochemical methods and surface analysis. The polarization measurement results show that the pitting potential (Ep) has a simple linear relationship with the temperature increase. Scanning Kelvin probe results show that the surface potential difference on the surface of 304 SS is well correlated with the temperature. Scanning electron microscope results show that the rupture of the passive film accelerates with the increase of temperature. The X‐ray photoelectron spectroscopy analysis shows that the high temperature causes more oxidation on the surface of 304 SS, leading more Cr3+ oxidized to Cr6+ at high temperature.

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Section: Resultsmentioning

confidence: 99%

Study on the passive behavior of 304 stainless steel under temperature variation

Liu,

Sui,

Zhang

et al. 2024

Materials & Corrosion

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“…The 316L stainless steel is widely used in aerospace vehicles, marine engineering, intelligent manufacturing, biomedicine, and other fields due to its excellent mechanical and good corrosion resistance characteristics [1][2][3][4]. However, in recent years, stringent requirements for various properties of metals with respect to mechanical processing, transportation and so on have been put forward [5].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and wear resistance of laser cladding nano TiC/micro TiB2/C-276 composite coatings on 316L stainless steel

Liu

Wang

et al. 2023

Mater. Res. Express

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Four metal-ceramic composite coatings were prepared by laser cladding (LC) using Hastelloy C-276, nano-TiC and micro-TiB2 as raw materials to improve the surface properties and extend the service life of 316L stainless steel. The microstructure and mechanical properties were analyzed by metallographic microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), Vickers hardness experiments, and friction and wear testing. The TiC and TiB2 phases were detected in the coating, exhibiting homogenous distribution as their content increased. As a result, the strengthening effect of the coating was enhanced, improving microhardness relative to that of the 316L substrate. The wear test revealed that the Hastelloy coating exhibited poor wear resistance, but the addition of TiC and TiB2 particles improved the wear resistance by reducing the wear rate. The lowest average coefficient and wear rate were attained at 50% and 70% ceramic contents, respectively. However, abundant hard particles on the surface easily fell off during the wear, which further impeded the surface degradation and increased the friction coefficient.

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“…Also, USSR synchronously prepares a high-quality surface with low roughness and few processing defects. Our previous work found that USSR forms a gradient structured surface layer with a thickness of ~1 mm in the selective laser melted (SLM) 316L stainless steel, endowing the steel with improved strength without a significant loss in ductility as well as enhanced corrosion resistance in NaCl solution [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Gradient Nanostructured Q345 Steel Prepared by Ultrasonic Severe Surface Rolling

Meng

Feng

et al. 2023

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In this work, ultrasonic severe surface rolling (USSR), a new surface nanocrystallization technique, is used to prepare gradient nanostructure (GNS) on the commercial Q345 structural steel. The microstructure of the GNS surface layer is characterized by employing EBSD and TEM, and the result indicates that a nanoscale substructure is formed at the topmost surface layer. The substructures are composed of subgrains and dislocation cells and have an average size of 309.4 nm. The GNS surface layer after USSR processing for one pass has a thickness of approximately 300 μm. The uniaxial tensile measurement indicates that the yield strength of the USSR sample improves by 25.1% compared to the as-received sample with slightly decreased ductility. The nanoscale substructure, refined grains, high density of dislocations, and hetero-deformation-induced strengthening are identified as responsible for the enhanced strength. This study provides a feasible approach to improving the mechanical properties of structural steel for wide applications.

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Improving corrosion resistance of selective laser melted 316L stainless steel through ultrasonic severe surface rolling

Cited by 20 publications

References 60 publications

Study on the passive behavior of 304 stainless steel under temperature variation

Study on the passive behavior of 304 stainless steel under temperature variation

Microstructure and wear resistance of laser cladding nano TiC/micro TiB2/C-276 composite coatings on 316L stainless steel

Microstructure and Mechanical Properties of Gradient Nanostructured Q345 Steel Prepared by Ultrasonic Severe Surface Rolling

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