The effect of shot peening on fatigue and corrosion behavior of 316L stainless steel in Ringer's solution (original) (raw)
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The wear and corrosion resistance of shot peened-nitrided 316L austenitic stainless steel
Materials & Design, 2011
Stainless steel 316L is one of the most common biomaterials utilized for producing orthopedic implants. But it has low resistance to fatigue and wear. Therefore surface treatments such as shot peening are used to modify the surface properties. In the present research, the influence of shot peening treatment on hardness, fatigue and corrosion behavior of 316L stainless steel in Ringer's solution was investigated. For this purpose, the steel specimens were shot peened for 5, 10, 15, 20 and 25 min. Hardness, fatigue and electrochemical tests were performed on each specimen before and after shot peening treatment. The open circuit potential (OCP) of the specimens, after 2 h of equilibrium time, was measured in Ringer's solution for 300 s. The cyclic potentiodynamic polarization tests were performed with 5 mV/s scan rate. According to the results, the shot peening treatment increases the surface hardness and fatigue resistance. In addition, this treatment decreases the break-down potential of the passive layer and increases the corrosion current density in shot peened specimens up to 10 min, which shows a reduction in resistance to pitting corrosion. However, the break-down potential of the passive layer begins to increase and the corrosion current density decreases at upper times. This trend continues such that even the conditions of resistance to pitting corrosion improve in comparison with un-shot peened specimens at longer times of shot peening. The morphology of the fractured surfaces of samples was investigated by scanning electron microscopy (SEM).
2021
R. I. Yaqin1, P. T. Iswanto1 (priyotri@ugm.ac.id), E. U. K. Maliwemu2 1 Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia. 2 Department of Mechanical Engineering, Universitas Nusa Cendana, Kupang, East Nusa Tenggara, Indonesia. AISI 316L is used in biomedical engineering as bone implant materials. The mechanical properties and corrosion resistance of this material can be improved by shot peening. The aim of this research is to investigate the effect of shot peening on surface roughness, hardness, wettability, and pitting corrosion resistance of AISI 316L in 0,9 % NaCl solution. The shot-peening was performed on AISI 316L surfaces with duration of 0, 2, 4, 10, 20, 30 minutes using steel balls with a diameter of 0,6 mm and hardness of 40 50 HRC. The results show that shot peening increase roughness after 2 minutes then decrease the roughness with increasing time. The longer duration of shot peening will increase the pitting corrosion r...
DOAJ (DOAJ: Directory of Open Access Journals), 2021
AISI 316L is used in biomedical engineering as bone implant materials. The mechanical properties and corrosion resistance of this material can be improved by shot peening. The aim of this research is to investigate the effect of shot peening on surface roughness, hardness, wettability, and pitting corrosion resistance of AISI 316L in 0,9 % NaCl solution. The shot-peening was performed on AISI 316L surfaces with duration of 0, 2, 4, 10, 20, 30 minutes using steel balls with a diameter of 0,6 mm and hardness of 40-50 HRC. The results show that shot peening increase roughness after 2 minutes then decrease the roughness with increasing time. The longer duration of shot peening will increase the pitting corrosion resistance.
The Effect of Shot Peening and Polishing on the Pitting Corrosion Resistance of Stainless Steel
American Journal of Applied Sciences, 2008
An experimental work was performed to study one of the major problems encountered in industry (i.e., pitting corrosion), which cost the industrial world billions of dollars every year. Stainless Steel 304L sheets were used in the present study, the main reason for using stainless steel is their corrosion resistance and it is the most widely used in process industries, but that is not always trouble free. It suffers localized attack in specific environments, which can lead to catastrophic unexpected failures. Resistance to pitting corrosion can be greatly increased by a cold working process called shot peening and polishing. The main objective of shot peening is to induce compressive stresses on the metal surface to operate the tensile stresses that lead to cracking, while the objective of the polishing is to make the surface very smooth and soft and that may induce the compressive stresses on the metal surface and eliminate the microscopic scratches during manufacturing processes. Shot peening and polishing can prevent or retard pitting and cracking, leading to economic saving as a result of longer equipment life. The experimental work is conducted to evaluate the effect of polishing and shot peening in preventing the initiation of pitting corrosion and cracking on the 304L stainless steel under the nitric acid and NaCl environments. The results obtained showed that shot peening and polishing can be beneficial in decreasing the pitting corrosion on stainless steel 304L, also the results showed that using the high quality polishing proved to be the best inhibiter for Stainless steel corrosion.
Austinatic Stainless Steel is one of the most widely used biomaterials for implants process, In the present study chemical and physical treatment have been used on two types of austinatic Stainless, 316L and 310S to compare their corrosion performance on both samples before and after both treatments. Corrosion rate for two samples was decrease with both treatments; polarization is confirming the open circuit potential and weight loss results. Metallography was studied by electron microscopy and X-ray photoelectron spectroscopy (XPS) method to evaluate the effectiveness of the proposed method and to determine the chromium concentration in the surface layer after treatment.
In Vitro Corrosion Study by EIS of Stainless Steel for Orthopaedic Applications
Proceedings of the Third International Symposium on Materials and Sustainable Development, 2018
Stainless steel 316L is one of the most common biomaterials utilized for producing orthopedic implants. Since the device is in constant contact with the blood, which is a highly corrosive environment, it is necessary to know the effects of corrosion on the screw plates. Currently 316L stainless steel is the material most commonly used for osteosynthesis. To assess the sensitivity of the screw plates in physiological media of the corrosion test plate required. The 316L stainless steel plates were tested for corrosion characteristics. The corrosion behavior of orthopaedic implant stainless steel 316L has been studied in a simulated body fluid using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. Polarization experiments were conducted after 4 h, 6 h, 24 h, 48 h, 168 h, 215 h, 10 days and 15 days, of immersion in Ringer's solution. Very low current densities were obtained, indicating the formation of a passive layer. Impedance spectra, represented in the Nyquist plan, exhibited a single constant system suggesting the formation of one layer.
Materials Today: Proceedings, 2022
Austenitic 316L stainless steel is one of the most common biomaterials used for orthopedic implants. As a highly corrosive environment, the device continuously contacts the blood. The corrosion effects on the screw plates must be known. The material most frequently used in osteosynthesis is currently 316L stainless steel. A simulated body fluid (S.B.F.) with electrochemical impedance spectroscopy (E.I.S.) and potentiodynamic (P.D.) polarization techniques has studied the corrosion behavior of stainless steel 316L. Corrosion characteristics were tested on 316L stainless steel surfaces resulted in corrosion rate are obtained highest for 270 min and lowest for 60 min immersion in S.B.F. Polarization experiments have been performed in a simulated body fluid following 60 min, 90 min, 180 min, and 270 min, there were relatively low densities, indicating a passive layer formation. The impedance spectrum in the Nyquist plot showed the development of the layer as a single constant system. It has been found today that current orthopedic implants tend to fail after long periods of use, as implants in the human body suffer from corrosion. This article gives a simple overview of the corrosion behavior for 316L stainless steel in orthopedic implant applications.
Lasers in Manufacturing and Materials Processing, 2018
In the present work, corrosion behavior of laser shock peened 316 L stainless steel was evaluated and compared with unpeened specimen in Hank solution (simulated body fluid) and chloride medium. Laser shock peening (LSP) was used for surface modification using Q-switched Nd-YAG laser. In the corrosion study, different electrochemical experiments such as open circuit potential (OCP)-time measurements, potentiodynamic anodic polarization, electrochemical impedance spectroscopy (EIS) measurements were performed in 0.5 M NaCl and Hank solution to examine the corrosion resistance of unpeened and laser peened 316 L SS specimens. The results of corrosion study demonstrated that LSP improved the pitting corrosion resistance despite marginally higher roughness (Ra = 1.01 μm) for laser peened surface than unpeened surface (Ra = 0.54 μm). Improvement in pitting corrosion resistance was indicated by ennoblement of OCP, more noble (anodic) value of pitting potential (E pit) and lower corrosion current density (I corr). Conductivity and pH of NaCl and Hank solution increased after every polarization experiments which indicate the ionic dissolution during corrosion experiments. Qualitative analysis of Nyquist plots obtained from electrochemical impedance spectroscopy (EIS) results also showed higher arc radius (higher polarization resistance) for laser peened specimen than unpeened, which is indicative of more protective passive film and hence improved corrosion resistance. Further, microstructural examination after polarization experiments in both NaCl and Hank solution showed less pitting sites in laser peened specimens than unpeened surfaces. These microstructural observations are in line with the results obtained in polarization experiments. The results of the study are important with respect to medical implants and their biocompatibility in the human body.