Surface Microstructure and Corrosion Resistance of 316L Stainless Steel after High Current Pulsed Electron Beam Treatment

2007 ◽  
Vol 561-565 ◽  
pp. 2381-2384 ◽  
Author(s):  
Sheng Zhi Hao ◽  
Ping Sheng Wu ◽  
Thierry Grosdidier ◽  
Chuang Dong
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
316L Stainless Steel ◽  
High Current ◽  
X Ray ◽  
Pulsed Electron Beam ◽  
Modified Surface ◽  
Working Parameters ◽  
Refinement Effect ◽  
Modified Surface Layer

HCPEB treatment of 316L stainless steel (SS) was carried out and the microstructure change in the modified surface layer were characterized with optical microscopy and X-ray diffractometry techniques. The evolution regularity of surface craters and grain refinement effect, as well as the preferred orientation of (111) crystal plane occurring in the HCPEB treatment at different working parameters were discussed combining with their influence on corrosion resistance.

Surface Treatment of 316L Stainless Steel by High Current Pulsed Electron Beam

2010 ◽  
Vol 654-656 ◽  
pp. 1803-1806 ◽  
Author(s):  
Sheng Zhi Hao ◽  
Yang Xu ◽  
Min Cai Li ◽  
Chuang Dong
Keyword(s):  
Stainless Steel ◽  
Electron Beam ◽  
Energy Density ◽  
Surface Treatment ◽  
316L Stainless Steel ◽  
Electron Backscatter Diffraction ◽  
Pulse Number ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Working Parameters

High current pulsed electron beam has been developing as a useful tool for surface modification of materials. This paper presents our research on the surface treatment of 316L stainless steel with an equipment of working parameters as electron energy 20-30keV, pulse duration 1.5µs and energy density ~6J/cm2. The surface microstructure was characterized with metallography, X-ray diffractometry and electron backscatter diffraction (EBSD) techniques. It was found that the modified samples showed significant improvement on corrosion resistance when using increased pulse number and higher energy density. This result is discussed in relation to the coupled temperature-stress fields formed after the absorption of electron beam energy.

Influence of Electron Beam Pulsed Times on the Properties of 40Cr

2010 ◽  
Vol 154-155 ◽  
pp. 1170-1177
Author(s):  
Yuan Fang Chen ◽  
Xiao Dong Peng ◽  
Jian Jun Hu ◽  
Hong Bin Xu ◽  
Chan Hao
Keyword(s):  
Surface Roughness ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Electron Beam ◽  
High Current ◽  
Wear Properties ◽  
X Ray ◽  
Pulsed Electron Beam ◽  
Surface Microstructures ◽  
40Cr Steel

Surface modification of 40Cr steel by high current pulsed electron beam has been investigated . The pulsed times of HCPEB was changed from 1 to 25 to prepare different specimens. Surface microstructures and section microstructures after HCPEB irradiation were detected by using metallurgical microscope, SEM and X-ray diffractometer. It is shown that crater defects were found on the surface after the irradiation of HCPEB and the density of craters will decrease with increasing pulses times. When treated by 27Kev accelerating voltage, with increasing pulse times, the particles located in surface layer were obviously refined .The surface roughness, hardness, wear properties and corrosion resistance were analyzed after irradiation of HCPEB. The wear resistance and corrosion resistance were obviously enhanced after 10 pulses treatment.

Electropolishing of 316L Stainless Steel Using Sulfuric Acid-Free Electrolyte

2019 ◽  
Vol 141 (10) ◽  
Author(s):  
Wei Han ◽  
Fengzhou Fang
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Phosphoric Acid ◽  
Photoelectron Spectroscopy ◽  
316L Stainless Steel ◽  
Electrochemical Analysis ◽  
Limiting Current ◽  
Plateau Region ◽  
X Ray

Abstract The study is to investigate the electropolishing characteristics of 316L stainless steel in a sulfuric acid-free electrolyte of phosphoric acid and glycerol and to explore the possibility of using this eco-friendly electrolyte instead of the widely used sulfuric acid-based electrolyte. The influences of process parameters on polishing effects and the corrosion resistance of electropolished samples are investigated. The experimental results show that the electropolishing temperature and acid concentration are directly related to the mass transport mechanism in the limiting current plateau region. The grain boundaries of workpiece were electrochemically dissolved faster than the grain themselves at the beginning of the electropolishing process because they are more reactive than grains. Moreover, the conventional sulfuric—phosphoric acid electrolyte was also used to electropolish the 316L stainless steel, and the electropolished surfaces were compared with the sulfuric acid-free electrolyte proposed in this study. When the sulfuric acid-free electrolyte was used to electropolish the 316L stainless steel, the X-ray photoelectron spectroscopy (XPS) analysis shows that atomic Cr/Fe ratio of 316L stainless steel was increased from 0.802 to 1.909 after electropolishing process in the sulfuric acid-free electrolyte of phosphoric acid and glycerol. The corrosion resistance of the electropolished 316L stainless steel is studied using electrochemical analysis, and the results are verified experimentally.

scholarly journals The Influence of Nitrogen Absorption on Microstructure, Properties and Cytotoxicity Assessment of 316L Stainless Steel Alloy Reinforced with Boron and Niobium

Processes ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 506 ◽  
Author(s):  
Sadaqat Ali ◽  
Ahmad Majdi Abdul Rani ◽  
Riaz Ahmad Mufti ◽  
Farooq I. Azam ◽  
Sri Hastuty ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Photoelectron Spectroscopy ◽  
316L Stainless Steel ◽  
Artificial Saliva ◽  
Alloy System ◽  
Sample Surface ◽  
Nickel Ions ◽  
X Ray ◽  
Cytotoxicity Assessment

In the past, 316L stainless steel (SS) has been the material of choice for implant manufacturing. However, the leaching of nickel ions from the SS matrix limits its usefulness as an implant material. In this study, an efficient approach for controlling the leaching of ions and improving its properties is presented. The composition of SS was modified with the addition of boron and niobium, which was followed by sintering in nitrogen atmosphere for 8 h. The X-ray diffraction (XRD) results showed the formation of strong nitrides, indicating the diffusion of nitrogen into the SS matrix. The X-ray photoelectron spectroscopy (XPS) analysis revealed that a nitride layer was deposited on the sample surface, thereby helping to control the leaching of metal ions. The corrosion resistance of the alloy systems in artificial saliva solution indicated minimal weight loss, indicating improved corrosion resistance. The cytotoxicity assessment of the alloy system showed that the developed modified stainless steel alloys are compatible with living cells and can be used as implant materials.

Microstructures and Properties of AISI 304L Stainless Steel Irradiated by High-Current Pulsed Electron Beam

2013 ◽  
Vol 787 ◽  
pp. 19-23
Author(s):  
Zai Qiang Zhang ◽  
Sheng Zhi Yang ◽  
Yan Li ◽  
Xiao Tong Wang ◽  
Xiu Li Hou ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Electron Beam ◽  
304L Stainless Steel ◽  
Metallic Materials ◽  
High Current ◽  
Aisi 304L ◽  
Pulsed Electron Beam ◽  
Aisi 304L Stainless Steel ◽  
The Relationship

AISI 304L austenite stainless steel was irradiated by a high-current pulsed electron beam (HCPEB) source in different process. The microstructures were investigated in detail by electron microscopy. The changes of hardness and corrosion resistance induced by irradiation were also tested. The relationship between corrosion resistance and the microstructures has been explored. The experimental results demonstrate the potential of proper HCPEB processing for improving the hardness and corrosion resistance of metallic materials.

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