Surface modification by gas nitriding for improving cavitation erosion resistance of CP-Ti

2014 ◽  
Vol 298 ◽  
pp. 164-170 ◽  
Author(s):  
Haibin Li ◽  
Zhenduo Cui ◽  
Zhaoyang Li ◽  
Shengli Zhu ◽  
Xianjin Yang
Keyword(s):  
Surface Modification ◽  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Gas Nitriding ◽  
Cavitation Erosion Resistance ◽  
Cp Ti

Assessment of Cavitation Erosion of Gas-Nitrided Cr-Ni-Mo Steels

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Ion Mitelea ◽  
Cristian Ghera ◽  
Ilare Bordeaşu ◽  
Corneliu Crăciunescu
Keyword(s):  
Electron Microscopy ◽  
Erosion Rate ◽  
Structural Changes ◽  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Thermochemical Treatment ◽  
Gas Nitriding ◽  
The Mean ◽  
Cavitation Erosion Resistance ◽  
Scanning Electron

The effect of the gas-nitriding thermochemical treatment on the cavitation erosion resistance of a Cr-Ni-Mo alloy is analyzed using a piezoceramic vibrating equipment and following the ASTM G32-2010 standard. The evaluation of the cavitation erosion behavior was made based on the analysis of the mean depth of erosion (MDE) and mean depth of erosion rate (MDER), for samples subjected to the cavitation erosion for different times. The surface topography and the structural changes in the marginal layer were analyzed through optical and scanning electron microscopy. Following nitriding the cavitation erosion resistance was about 9.6 times higher compared to the annealed state and about 8.2 times higher compared to the hardened and tempered state.

Improvement Of Cavitation Erosion Resistance and Corrosion Resistance Of Brass by Laser Surface Modification

2000 ◽  
Vol 617 ◽  
Author(s):  
K. F. Tam ◽  
F. T. Cheng ◽  
H. C. Man
Keyword(s):  
Corrosion Resistance ◽  
Surface Modification ◽  
Cavitation Erosion ◽  
Continuous Wave ◽  
Erosion Resistance ◽  
Laser Surface ◽  
Hardness Profile ◽  
Anodic Current Density ◽  
Laser Surface Modification ◽  
Cavitation Erosion Resistance

AbstractLaser surface modification of brass (Cu-38Zn-1.5Pb) using AISiFe and NiCrSiB alloy was achieved by using a 2kW continuous wave Nd-YAG laser with the aim of improving the cavitation erosion resistance and corrosion resistance. The alloying powder was preplaced on the brass substrate by thermal spraying to a thickness of 350µm, followed by laser beam scanning to effect melting, mixing and alloying. A modified surface was achieved by overlapping of adjacent tracks. The cavitation erosion resistance and the anodic polarization characteristics of the laser surface modified specimens in 3.5% NaCI solution at 23°C were studied by means of a 20kHz ultrasonic vibrator at a peak to peak amplitude of 60µm and a potentiostat respectively. The cavitation erosion resistance of the specimens modified with AlSiFe and NiCrSiB was improved by a factor of 3 and 7 respectively, compared with that of the brass substrate. Potentiodynamic test, however, indicated that the corrosion resistance of specimens modified with AlSiFe deteriorated, as reflected by a shift of the polarization curve towards higher current densities. On the other hand, the corrosion resistance of specimens modified with NiCrSiB was significantly improved, as evidenced by the presence of a passive region (from −175 mV to −112 mV) and a reduction in the anodic current density by at least an order of magnitude compared with the substrate at the same anodic potential. The hardness profile and the compositional profile were measured using a Vickers hardness tester and EDX respectively. The microstructure and the surface morphology of the specimens were investigated with the aid of SEM and optical microscopy.

Cavitation erosion resistance of a Co28Cr22Fe alloy.

2017 ◽  
Author(s):  
Juliana Barbarioli ◽  
André Tschiptschin ◽  
Cherlio Scandian ◽  
Manuelle Curbani Romero
Keyword(s):  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Cavitation Erosion Resistance

Effects of Co addition on microstructure and cavitation erosion resistance of plasma sprayed TiNi based coating

2021 ◽  
Vol 409 ◽  
pp. 126838
Author(s):  
Xinlong Wei ◽  
Wuyan Zhu ◽  
Aolin Ban ◽  
Dejia Zhu ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Co Addition ◽  
Cavitation Erosion Resistance ◽  
Plasma Sprayed
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