Experimental analysis of jet slurry erosion on martensitic stainless steel (original) (raw)
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Metals
This work evaluates the behavior of a martensitic stainless steel (AISI 410) thermally treated by quenching and tempering with a tungsten carbide (86WC-10Co-4Cr) coating obtained by high-velocity oxygen fuel (HVOF) thermal spray deposition, analyzing the volume loss under erosive attacks at 30 ∘ and 90 ∘ incidence angles by using jet slurry erosion equipment with electrofused alumina erodent particles. Firstly, the characterization of the samples was carried out in terms of the microstructure (SEM), thickness, roughness, porosity, and microhardness. Then, samples were structurally characterized in the identification of the phases (XRD and EDS) present in the coating, as well as the particle size distribution (LG) and morphology of the erodent. It was determined that the tungsten carbide coating presented better resistance to jet slurry erosion wear when compared to the martensitic stainless steel analyzed, which is approximately two times higher for the 30 ∘ angle. The more ductile ...
Metallurgical and Materials Transactions, 2019
Synergistic corrosion and oxidation can accelerate the wear phenomenon in aggressive environments such as machinery operating in mining industries. The main purpose of this article is to study the erosion wear behavior of the AISI 201LN austenitic stainless steel toward an erosive wear process simulating the flow of particles in chutes. In addition to its good resistance to corrosion, the high Md temperature and low stacking fault energy (SFE) presented by the AISI 201LN steel favor its deformation-induced e-martensitic transformation and, consequently, its work-hardening capacity. These characteristics induce a high potential in applications where mechanical wear occurs simultaneously with corrosion. For comparison purposes, AISI 304 and AISI 410 stainless steels, commonly used in mining and agroindustry equipment, were also studied in this work. Among the austenitic alloys, since its composition is weak in nickel, the AISI 201LN steel has a low production cost. The erosion tests were performed with impact angles of 20 and 90 deg, and the eroded samples were characterized by optical microscopy, scanning electron microscopy (SEM), and microhardness measurements. All the materials studied presented erosive wear by plastic deformation, and the AISI 201LN steel exhibited the highest erosive wear resistance. Its high ductility, high hardening rate, and high tendency to form martensite by deformation were fundamentals for such response. As a result, the AISI 201LN stainless steel seems promising as a cheaper material for applications in equipment that undergoes simultaneous erosive and corrosive wear.
Study on erosion wear of steels under varying abrasive jet
Materials Today: Proceedings, 2018
Erosion is one of the frequently occurring wear of aerospace, power plant, surface vehicles and ship components. Wear is detrimental that reduces service life of the engineering components. An abrasive jet system can provide the means of erosion by supplying high velocity abrasive jet towards the materials from which components are made. On way of investigating the sustainability of engineering materials against erosion, mild steel and austenitic stainless steel had been being targeted by an abrasive jet by varying different process parameters. The rate of erosion of mild steel and austenitic stainless steel was measured under various process conditions. The effect of different process parameters on crater depth was also investigated.
Slurry erosion behaviour of thermomechanically treated 16Cr5Ni stainless steel
Tribology International, 2018
16Cr5Ni martensitic stainless steels are used for making underwater parts of hydro turbines, which suffer severe attack from sand particles during service. The effect of thermomechanical processing that can potentially improve the mechanical properties of steels on the slurry erosion behaviour is studied. Hot compression tests were performed at strain rates of 0.001 s À1 and 10 s À1 at 950 C and 1050 C for a true strain of 0.7. The erosion test is conducted in a slurry pot erosion tester for 24 h at room temperature. Thermomechanically processed specimens exhibited enhanced slurry erosion that is attributed to its lower toughness arising from typical microstructural features. The erosion mechanism is correlated with the microstructure, hardness and tensile properties.
Mechanisms of stainless steels erosion by water droplets
Wear, 2013
Our study deals with rain erosion of metal, which concerns aeronautic industries. The erosion resistance of AISI301 and MLX17, austenitic and martensitic stainless steels respectively, has been appraised thanks to a pulsated water jet device. Moreover, the influence of hardness has been evaluated thanks to hard-rolling plates. The tests of erosion are 10 million impacts for each material with 225 m/s impact velocity to obtain sufficient wear volume. The kinetics has been assessed by stopping the test every million impacts, making possible replicas of defects with fast precision resin. An in-service eroded sample has been analysed for comparison purpose. Finally, the best erosion resistance among the tested materials was shown by the hardrolled austenitic stainless steel, since erosion resistance increases with work hardening. Sample MLX17 was not as resistant as hard-rolled AISI301 despite better mechanical properties. This would be due to a more brittle behaviour of martensite than that of austenite. Surface observations of tested samples reveal intergranular cracks and fatigue defects similar to those observed in-service. Finally the erosion mechanisms consist of plastic deformation, work hardening, initiation and growing of cracks and, finally, fatigue spalling.
Erosion Behavior of CA-15 Tempered Martensitic Stainless Steel
MATERIALS TRANSACTIONS, 2003
Martensite stainless steel (MSS) possesses excellent strength and medium corrosion resistance, and is often used in industrial applications, such as for highly stressed parts like turbine blades and pipe materials. However parts are often damaged by flow field particles interact with the materials, in a solid particle erosion (SPE) phenomenon, which may even lead to injuries. In this paper we discuss the effects of the tempering treatment and the erosion incident angle on the CA-15 MSS erosion behavior. The results show that, in single particle erosion tests, the main mechanisms that cause problems are micro-cutting and deformation craters at low and high incident angles, respectively. In repetitive particle erosion tests, grain boundary cracking is one of the main fracture mechanisms. The platelet mechanism also obvious affected at high incident angle erosion. Materials tempered at 573-673 K, tempered martensitic embrittlement (TME) occurred, which caused serious boundary cracking and grain broken-down. The serious erosion damage showed at medium incident angle for this material that result in combine of cutting, deformation crater, and cracking mechanism. The maximum erosion rate of material occurred at an incident angle of =6 and the deepest erosion penetration occurred at an incident angle of =4.
Journal of Al-Azhar University Engineering Sector
The present work is a study of the effect of slurry particle type, impact angle, and velocity, and test duration time on the erosion process of stainless steel 316, 304. Erosion change the surface geometry of the parts, components of machines that will affect the performance and efficiency of the parts may be causing the parts failure. Mud or sand particles were used in water with concentration of 40 wt. %. The particle maximum dimension is 550 µm. Specimens velocities were 2.3m/s and 5.75 m/s using a simple test rig was designed and fabricated to investigate slurry erosion and cavitation erosion. This is done by rotating the specimens in a transparent tank containing slurry with the desired composition and concentration with a fluid. The velocity of specimens can be from zero m/s up to 14 m/s. The specimen weight loss of the eroded sample was examined and was evaluated. The weight loss is measured using a balance with sensitivity of 0.0001g, and the surface is photography using SEM examination. Results show that; the increase of particles hardness results in increase the weight loss. And increase the testing time affecting the wear rate. Also increase velocity increasing weight loss.
The slurry erosion of two coatings applied by oxy fuel powder (OFP) and wire arc spraying (WAS) processes onto sand-blasted AISI 304 steel was studied, and the results were compared to those obtained with AISI 431 and ASTM A743 grade CA6NM stainless steels, which are commonly used for hydraulic turbines and accessories. The adherence of the coatings to the substrate was measured according to ASTM C 633 standard, while the microstructure and worn surfaces were characterized by optical and scanning electron microscopy. Slurry erosion tests were carried out in a modified centrifugal pump, in which the samples were placed conveniently to ensure grazing incidence of the particles. The slurry was composed of distilled water and quartz sand particles with an average diameter between 212 and 300 m (AFS 50/70) and the solids content was 10 wt% in all the tests. The mean impact velocity of the slurry was 5.5 m/s and the erosion resistance was determined from the volume loss results. The coated surfaces showed higher erosion resistance than the uncoated stainless steels, with the lower volume losses measured for the E-C 29123 deposit. SEM analysis of the worn surfaces revealed intense plastic deformation in both coated and bare stainless steels, with little evidence of brittle fracture in the microstructure. The measured adhesive strength of the coatings was considered acceptable for the processes employed.
EROSION BEHAVIOUR OF STAINLESS STEEL
IRJET, 2022
In current year’s big development has been made each in gaining a fundamental perception of the giant parameters of put on and in making use of a substances methodology to mitigate the troubles of wear. While this mission work will solely tackle strong particle erosion, it is properly to hold in thought that different put on processes, e.g., abrasive put on and oxidative wear, contain many comparable traits and possibly mechanisms. Progress in grasp any one of these techniques can also be relevant to others, and to the improvement of greater put on resistant substances and systems. Testing on ferrous and non-ferrous substances has been broadly carried out to find out about their erosion resistance. Venkataraman & Sundararajan [1] carried out a learn about about the stable particle erosion of copper at a vary of low have an effect on velocities. In this unique case, the eroded floor used to be absolutely blanketed with the erosion particles in the structure of flakes or platelets. These flakes regarded to be definitely separated or fractured from the cloth floor and have been flattened via subsequent impacts. For this reason, it used to be concluded that at low affect velocities the erosion harm was once characterized on the whole via lip or platelet fracture whereas it used to be distinctive with lip formation (rather than its subsequent fracture) at greater affect velocities. In this undertaking erosion conduct of the stainless metal is evaluated via exposing the metal substrate to erodent at predefined pace and pressure. Effect of have an effect on perspective and erodent speed on erosion resistance of the metal substrate is studied with the assist of strong particle erosion setup.