Influence of Spatial Structures of 316L Stainless Steel on its Cavitation Erosion Resistance

2014 ◽  
Vol 225 ◽  
pp. 109-114
Author(s):  
Beata Śniegocka ◽  
Marek Szkodo ◽  
Jarosław Chmiel
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Cavitation Erosion ◽  
316L Stainless Steel ◽  
Erosion Resistance ◽  
Spatial Structures ◽  
Erosion Test ◽  
Cavitation Erosion Resistance ◽  
Scanning Electron

Cavitation erosion performance of modified macroscopic internal structure 316L stainless steel was investigated. The samples processed by means of SLM method were subjected to cavitation erosion test. The scanning electron microscope Philips 30/ESEM was used to examine morphology of eroded surface.

Cavitation erosion resistance of ZrC nanoceramic coating

2019 ◽  
Vol 234 (6) ◽  
pp. 833-841 ◽  
Author(s):  
Hongqin Ding ◽  
Shuyun Jiang ◽  
Jiang Xu
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Volume Loss ◽  
Electrochemical Test ◽  
316 Stainless Steel ◽  
Cavitation Erosion Resistance ◽  
Scanning Electron

A ZrC nanoceramic coating was prepared on the bare 316 stainless steel for improving the cavitation erosion resistance by the double glow discharge sputter technique. The phase constitution and surface microstructure of the ZrC nanoceramic coating were characterized by X-ray diffraction, scanning electron microscope, and transmission electron microscopy. A 10-µm-thick ZrC nanoceramic coating exhibited equiaxed grains with an average grain size of 9 nm. The adhesion strength and mechanical properties for the ZrC nanoceramic coating were evaluated by scratch test and nanoindentation. The hardness value of the ZrC nanoceramic coating was about four times that of the uncoated 316 stainless steel. The cavitation erosion behavior of the ZrC nanoceramic coating in tap water was characterized by the combination of an ultrasonic vibration system with an electrochemical workstation. The volume loss, erosion depth, scanning electron microscope morphology, and electrochemical test were adopted to assess the surface damage of the ZrC nanoceramic coating. The results show that the volume loss of the ZrC nanoceramic coating is 0.53 mm3, which is only 46% of the 316 stainless steel (1.14 mm3) after cavitation test, and erosion damage of the ZrC nanoceramic coating is significantly decreased as compared to the uncoated 316 stainless steel. The electrochemical test results also indicate that the ZrC nanoceramic coating shows higher corrosion resistance than the 316 stainless steel under cavitation erosion condition. Thus, the ZrC nanoceramic coating can be adopted to enhance the cavitation erosion resistance of the 316 stainless steel.

A Study on the Optimization of Solvent Debinding Process for Powder Injection Molded 316L Stainless Steel Parts

2016 ◽  
Vol 1133 ◽  
pp. 324-328 ◽  
Author(s):  
Muhammad Aslam ◽  
Faiz Ahmad ◽  
P.S.M. Bm-Yousoff ◽  
Khurram Altaf ◽  
Afian Omar ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
316L Stainless Steel ◽  
Research Work ◽  
Powder Injection ◽  
Blade Mixer ◽  
Injection Molded ◽  
Debinding Process ◽  
Scanning Electron

Optimization of solvent debinding process parameters for powder injection molded 316L stainless steel (SS) has been reported in this research work. Powder gas atomized (PGA) 316L SS was blended with a multicomponent binder in Z-blade mixer at 170°C ± 5°C for 90 minutes. Feedstock was successfully injected at temperature 170 ± 5°C. Injection molded samples were immersed in n-heptane for 2h, 4h, 6h and 8h at temperatures 50°C ,55°C and 60°C to extract the soluble binder components. Scanning electron microscope (SEM) results attested that soluble binder components were completely extracted from injection molded samples at temperature 55°C after 6h.

scholarly journals Cavitation erosion resistance of 316L stainless steel fabricated using selective laser melting

Friction ◽  
2020 ◽  
Author(s):  
Hongqin Ding ◽  
Qing Tang ◽  
Yi Zhu ◽  
Chao Zhang ◽  
Huayong Yang
Keyword(s):  
Stainless Steel ◽  
Selective Laser Melting ◽  
Laser Power ◽  
Cavitation Erosion ◽  
316L Stainless Steel ◽  
Erosion Resistance ◽  
Scanning Speed ◽  
Laser Melting ◽  
Cavitation Damage ◽  
Cavitation Erosion Resistance

AbstractCavitation erosion degrades the performance and reliability of hydraulic machinery. Selective laser melting (SLM) is a type of metal additive manufacturing technology that can fabricate metal parts directly and provide lightweight design in various industrial applications. However, the cavitation erosion behaviors of SLM-fabricated parts have rarely been studied. In this study, SLM 316L stainless steel samples were fabricated via SLM technology considering the scanning strategy, scanning speed, laser power, and build orientation. The effect of the process parameters on the cavitation erosion resistance of the SLM-fabricated 316L stainless steel samples was illustrated using an ultrasonic vibratory cavitation system. The mass loss and surface topography were employed to evaluate the surface cavitation damage of the SLM-fabricated 316L stainless steel samples after the cavitation test. The cavitation damage mechanism of the SLM-fabricated samples was discussed. The results show that the degree of cavitation damage of the sample fabricated via SLM with a few defects, anisotropic build direction, and columnar microstructure is significantly decreased. Defects such as pores, which are attributed to low laser power and high scanning speed, may severely aggravate the cavitation damage of the SLM-fabricated samples. The sample fabricated via SLM with a low laser power and exposure time exhibited the highest porosity and poor cavitation erosion resistance. The cellular structures are more prone to cavitation damage compared with the columnar structures. A sample with a high density of grain boundaries will severely suffer cavitation damage.

scholarly journals Microstructure and Cavitation Erosion Resistance of HVOF Deposited WC-Co Coatings with Different Sized WC

Coatings ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 307 ◽  
Author(s):  
Xiang Ding ◽  
Du Ke ◽  
Chengqing Yuan ◽  
Zhangxiong Ding ◽  
Xudong Cheng
Keyword(s):  
Fracture Toughness ◽  
Electron Microscope ◽  
Cavitation Erosion ◽  
Erosion Resistance ◽  
The Other ◽  
Fuel Spray ◽  
X Ray ◽  
Cavitation Erosion Resistance ◽  
Scanning Electron ◽  
Conventional Coating

Conventional, multimodal and nanostructured WC-12Co coatings with different WC sizes and distributions were prepared by high velocity oxy-fuel spray (HVOF). The micrographs and structures of the coatings were analyzed by scanning electron microscope (SEM), X-ray diffractometer (XRD) et al. The porosity, microhardness and fracture toughness of the WC-Co coatings were measured. The coating resistance to cavitation erosion (CE) was investigated by ultrasonic vibration cavitation equipment and the cavitation mechanisms were explored. Results show that there is serious WC decarburization in nanostructured and multimodal WC-Co coatings with the formation of W2C and W phases. The nanostructured WC-Co coating has the densest microstructure with lowest porosity compared to the other two WC-Co coatings, as well as the highest fracture toughness among the three coatings. It was also discovered that the nanostructured WC-Co coating exhibits the best CE resistance and that the CE rate is approximately one-third in comparison with conventional coating.

Study on Cavitation Erosion Properties of Stainless Steel Vane Wheel Enhanced by Electro-Spark Deposition (ESD) Technology

2011 ◽  
Vol 239-242 ◽  
pp. 2229-2232 ◽  
Author(s):  
Chang Jun Chen ◽  
Yan Zhan Su ◽  
Qin Cao ◽  
Min Zhang
Keyword(s):  
Stainless Steel ◽  
Cavitation Erosion ◽  
Energy Dispersive Spectrometry ◽  
Erosion Resistance ◽  
Optical Microscope ◽  
Ultrasonic Equipment ◽  
Erosion Properties ◽  
Preliminary Study ◽  
Cavitation Erosion Resistance ◽  
Scanning Electron

In this paper, Electro-Spark Deposition (ESD) technology was used to enhance the cavitation erosion resistance of the stainless steel. The microstructure and composition of the deposition layers were studied by optical microscope (OM), scanning electron microscope (SEM) and energy dispersive Spectrometry (EDS) on cavitation erosion resistance was investigated. The microhardness was measured too. The cavitation erosion resistance was measured in ultrasonic equipment. The preliminary study confirmed that the cavitation erosion resistance of the deposition layer was enhanced compared to the untreated substrate. Now, vane wheel made of cast-iron, stainless steel and oil bump damaged by cavitation erosion have been repaired by ESD. And the properties of the repaired vane wheels were the same as the new ones.

Microscopic Study of Smooth Silver-plated Retention Pins in Amalgam

1980 ◽  
Vol 59 (2) ◽  
pp. 124-128 ◽  
Author(s):  
Y. Galindo ◽  
K. McLachlan ◽  
Z. Kasloff
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microscopic Study ◽  
Strong Evidence ◽  
Mechanical Performance ◽  
Silver Layer ◽  
Mechanical Bonding ◽  
Bonding Characteristics ◽  
Scanning Electron

A silver-plating technique was developed in an effort to produce good mechanical bonding characteristics between stainless steelpins and amalgam. Metallographic microscope and scanning electron microscope (SEM) studies were made to assess the presence, or otherwise, of such a bond between (a) the silver layer plating and the surface of the stainless steel pins, and (b) and silver plating and the amalgam. Unplated stainless steel and sterling silver pins were used as a control and as a comparison, respectively. A "rubbing" technique of condensation was devised to closely adapt amalgam to the pins. It is concluded that there is strong evidence for the existence of a good bond between the plated pins and amalgam. The mechanical performance of the bond is discussed elsewhere. 1.

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