High corrosion and wear resistance of Al-based amorphous metallic coating synthesized by HVAF spraying

Gao, Minghao; Lu, Wenjian; Yang, Baojun; Zhang, Suode; Wang, Jianqiang

doi:10.1016/j.jallcom.2017.11.274

Cited by 73 publications

(32 citation statements)

References 51 publications

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“…Figure 9 shows the wear rates of coatings under different test conditions. The wear rate was calculated by the equation [36]: W = V m / (N × S), where W is the wear rate (mm 3 ·N −1 ·m −1 ), V m is the wear volume (mm 3 ), N is the load (N), and S is the sliding distance (m). The wear rates of both C1 and C2 were lower than that of C0 at any test condition, showing that wear resistance was improved via the process of simultaneous shot peening.…”

Section: Friction Coefficient and Wear Ratementioning

confidence: 99%

Synchronous Shot Peening Applied on HVOF for Improvement on Wear Resistance of Fe-based Amorphous Coating

et al. 2020

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Shot peening was used synchronously to improve Fe-based amorphous coating performance by delivering ZrO2 ceramic particles into a low-temperature region of a flame during the high velocity oxygen flame (HVOF) spray process. The coating became denser, and its hardness became higher via the new process. Moreover, the compressive residual stress was induced by shot peening. The results from the dry friction test indicated that the coating’s wear resistance was enhanced obviously. The wear mechanism of coatings with and without shot peening is an abrasive wear combined with an oxidation wear at wear test conditions of a low load and a low frequency. The coating with the best wear resistance did not have the strongest microhardness but had the highest compressive residual stress. The compressive residual stress had a significant positive influence on the wear resistance at a low frequency, while its effect is weakened at a high frequency.

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Section: Friction Coefficient and Wear Ratementioning

confidence: 99%

Synchronous Shot Peening Applied on HVOF for Improvement on Wear Resistance of Fe-based Amorphous Coating

et al. 2020

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“…The laser-remelted Al coating had regional characteristics because the laser beam spot was scanned at the certain speed on the Al coating: its surface was first heated and then the heating was transferred from the surface through the heat conduction into the inner coating, which caused an uneven distribution of temperature in the molten pool and produced the uneven mass-transfer in the molten pool. On the central region of the laser beam near the substrate, the pool temperature was very high, while the substrate temperature was relatively low due to the temperature gradient; the temperature-distribution and solidification rate were different on the regions of molten pool, which led to different micro-structures on the different regions of the molten layer [ 28 , 29 ]. The friction-wear properties of surface layer of 0~70 μm on the cold sprayed Al coating after LR were mainly investigated, which is considered the surface layer as the remelted layer of Al coating.…”

Section: Analysis and Discussion Of Resultsmentioning

confidence: 99%

Effect of Laser Remelting on Friction-Wear Behaviors of Cold Sprayed Al Coatings in 3.5% NaCl Solution

Dejun

2018

Materials

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A cold sprayed Al coating on S355 structural steel was processed using a laser remelting (LR). The surface and cross-section morphologies, chemical compositions, and phases of as-obtained Al coating before and after LR were analyzed using a scanning electronic microscope (SEM), energy dispersive spectrometer (EDS), and X-ray diffractometer (XRD), respectively, and their hardness was measured using a micro-hardness tester. The friction-wear behaviors of Al coating before and after LR in 3.5% NaCl solution were conducted to simulate the sand and gravel scouring on its surface in seawater, the effects of wear loads and speeds on the tribological properties of Al coating were analyzed, and the wear mechanisms under different wear loads and speeds were also discussed. The results show that the Al coating after LR is primarily composed of an Al phase and its hardness is 104.66 HV, increasing 54.70 HV than the cold sprayed Al coating. The average coefficient of friction (COF) of cold sprayed Al coating at the wear load of 0.5, 1.0 and 1.5 N is 0.285, 0.239, and 0.435, respectively, while that after LR is 0.243, 0.227, and 0.327, respectively, decreased by 14.73%, 5.02% and 24.83% compared to the cold sprayed Al coating. The wear rate of cold sprayed Al coating at the wear load of 0.5, 1.0 and 1.5 N is 1.60 × 10−4, 2.36 × 10−4, and 2.40 × 10−4 mm3/m·N, respectively, while that after LR is 1.59 × 10−4, 1.70 × 10−4, and 1.94 × 10–4 mm3/m·N, respectively, decreased by 1%, 32%, and 23%, respectively, indicating that LR has high anti-friction performance. Under the wear load action of 1.0 N, the average COF of laser remelted Al coating at the wear speeds of 300, 400 and 500 times/min is 0.294, 0.279, and 0.239, respectively, and the corresponding wear rate is 1.06 × 10−4, 1.24 × 10−4, and 1.70 × 10−4 mm3/m·N, respectively. The wear mechanism of cold sprayed Al coating is primarily corrosion wear at the loads of 0.5 and 1.0 N, and that at the load of 1.5 N is abrasive wear and fatigue wear; while that after LR is abrasive wear and fatigue wear, with no corrosion wear, showing that LR improves its corrosion and wear resistance.

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“…Например, для сплавов системы Fe-Si-B критическая скорость охлаждения, достаточная для образования аморфного состояния, составляет 10 6 …10 7 К/с [8]. В настоящее время аморфное состояние получено у широкого круга сплавов на основе железа [9][10][11][12], никеля [13], алюминия [14], меди [15], показаны их высокие эксплуатационные свойства. Развиваются методы численного моделирования для поиска лучших составов аморфизируемых сплавов [16].…”

Section: технологияunclassified

Formation of Hardening Coatings based on Fe-Cr-Si-B-C Alloys with High Glass-Forming Ability by Laser-Plasma Methods

Khomyakov¹,

Pinaev²,

Statsenko³

et al. 2018

Metal Working and Material Science

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High corrosion and wear resistance of Al-based amorphous metallic coating synthesized by HVAF spraying

Cited by 73 publications

References 51 publications

Synchronous Shot Peening Applied on HVOF for Improvement on Wear Resistance of Fe-based Amorphous Coating

Synchronous Shot Peening Applied on HVOF for Improvement on Wear Resistance of Fe-based Amorphous Coating

Effect of Laser Remelting on Friction-Wear Behaviors of Cold Sprayed Al Coatings in 3.5% NaCl Solution

Formation of Hardening Coatings based on Fe-Cr-Si-B-C Alloys with High Glass-Forming Ability by Laser-Plasma Methods

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