AISI 304L

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Effect of welding parameters on pitting corrosion rate of pulsed current micro plasma arc welded AISI 304L sheets in 1N HCl

Effect of welding parameters on pitting corrosion rate of pulsed current micro plasma arc welded AISI 304L sheets in 1N HCl

A five level, four factor full factorial design matrix based on the central composite rotatable design technique was used for the development of mathematical models to predict the pitting corrosion rate of AISI 304L Austenitic stainless sheets welded by pulsed current micro plasma arc welding process. From the contour plots, it was observed that peak current was the most dominating parameter which affected pitting corrosion rate compared to other parameters. According to the surface plots, minimum obtained pitting corrosion rate was 0.64569 mm/Year for the input parameter combination

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Optimization and Predication of Spot TIG Welding Parameters of Stainless Steel Sheets (AISI 304L)

Optimization and Predication of Spot TIG Welding Parameters of Stainless Steel Sheets (AISI 304L)

ABSTRACT: This research aims to investigate the effect of TIG spot welding parameters such as welding current , welding time and sheet thickness on the maximum shear force and spot diameter of austenitic stainless steel AISI 304L with thickness of 0.6 mm, 0.8 mm & 1.0 mm .Taguchi method with using L27 orthogonal array was applied to select the optimum welding parameters. Results show that the maximum shear force of spot weld would increase with increasing welding current and welding time to a specific amount, afterwards it would drop at higher current and longer times. MATLAB software had been used to make 27 samples, spot TIG welding parameters were (3) therefore minimum of number for experiments should be not less than 27. The random samples 21 were taken for training the network and 6 random samples for test the network. The relationship between the 21values of spot diameter and max shear force was determined from experiments and those of predicted the ANN (Artificial Neural Network) model was drawn in figures. It was shown from these figures that a good concurrence is observed between the measured and the predicted of spot diameter and max shear force values.

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Investigations of sand water induced erosive wear of AISI 304L stainless steel pipes by pilot scale and laboratory scale testing

Investigations of sand water induced erosive wear of AISI 304L stainless steel pipes by pilot scale and laboratory scale testing

The pilot-scale sand/water rig is sketched in Figure 2. The pipe loop was constructed in the horizontal plane with a valve to allow flow to be diverted to another loop as necessary. A high power gate stirrer was installed to help distribute the solids in the tank. Pipe components were made of AISI 304L stainless steel with a nominal wall thickness of 5mm. The pipes were of 80mm nominal bore, although the actual mean of a series of measurements was 77.8 mm. Bend 65 had the greatest curvature of the whole loop (Rc/D = 1.2) and, with its upstream straight 43, is analysed for its flow characteristics and propensity to wear in this paper. Details of these components are given in Figure 3.

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Performance Capabilities of EDM machining using Aluminum, Brass and Copper for AISI 304L Material.

Performance Capabilities of EDM machining using Aluminum, Brass and Copper for AISI 304L Material.

Electrical discharge machining (EDM) is one of the non-traditional machining processes, based on thermo electric energy between the work piece and an electrode. In this process, the material removal is occurred electro thermally by a series of successive discrete discharges between electrode and the work piece. The performance capabilities of the EDM process by using different electrode materials has been carried out. In recent years, EDM researchers have explored a number of ways to improve the sparking efficiency including some unique experimental concepts that depart from the EDM traditional sparking phenomenon. Despite a range of different approaches, this new research shares the same objectives of achieving m ore efficient metal removal coupled with a reduction in tool wear and improved surface quality. The Material Removal Rate (MRR), Tool Wear Rate (TWR) and Surface Roughness (SR) is measured and recorded for detailed analysis. Different electrode materials viz. Aluminum, Brass, Copper and work piece material as AISI 304L have been employed for the set of exper iments. The dielectric used is Kerosene diluted with water. The objective of the experiment is to identify the best material in terms of higher MRR, lower TWR, and excellent surface finish.

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An experimental and numerical study of the crack propagation behaviour and non-propagation conditions in AISI 304L austenitic stainless steel under both isothermal and thermal fatigue

An experimental and numerical study of the crack propagation behaviour and non-propagation conditions in AISI 304L austenitic stainless steel under both isothermal and thermal fatigue

As part of this work, a new thermal fatigue test, Fat3D, has been developed to study the problem of fatigue crack growth under thermal fatigue conditions on AISI 304L quasi-structure specimens. The importance of the initiation and the propagation phases on a notched specimen and the evolution of the stress intensity factor according to the propagation were also investigated. This experimental campaign has also been completed by a characterisation campaign on the AISI 304L material and by a benchmark of different non destructive techniques to detect and follow crack propagation.

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INFLUENCE OF WELD POOL VIBRATION ON IMPACT STRENGTH AND METALLURGICAL PROPERTIES OF AISI 304L BUTT WELDED JOINT

INFLUENCE OF WELD POOL VIBRATION ON IMPACT STRENGTH AND METALLURGICAL PROPERTIES OF AISI 304L BUTT WELDED JOINT

Effect of simultaneous weld pool vibrations during the gas tungsten arc welding process on the impact strength and micro hardness of butt welded joints have been studied. AISI 304L SS material was selected for the present study. A set up for imparting continuous and constant frequency and amplitude vibrations to the weld pool was designed and fabricated. Comparative study of the welded joints both under the influence of weld pool vibrations and without weld pool vibrations (conventional) was conducted. Charpy impact test and micro hardness test were conducted. Microstructural studies reveal that relatively fine grained structures have been obtained in the joints welded under the influence of weld pool vibrations. The improvement of impact strength of the joint welded at low input current due to weld pool vibration is of 11.9%, and the improvement in impact strength of the joint welded at high input current is of 6.5%. Similar trend is observed in the micro hardness values (HV 0.5 ). Increment of 8.5 % in micro hardness value was achieved by applying vibration to the

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Study on Factors Effecting Weld Pool Geometry of Pulsed Current Micro Plasma Arc Welded AISI 304L Austenitic Stainless Steel Sheets Using Statistical Approach

Study on Factors Effecting Weld Pool Geometry of Pulsed Current Micro Plasma Arc Welded AISI 304L Austenitic Stainless Steel Sheets Using Statistical Approach

AISI 304L stainless steel sheets of 100 × 150 × 0.25 mm are welded autogenously with square butt joint without edge preparation. The chemical composition of AISI 304 L stainless steel sheet procured from Salem Steel Plant, India is given in Table 1. High purity argon gas (99.99%) is used as a shielding gas and a trailing gas right after welding to prevent absorption of oxygen and nitrogen from the atmosphere. The welding has been carried out under the welding conditions presented in Table 2. From the literature four important factors of pulsed current

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Application of Hooke & Jeeves Algorithm in Optimizing Fusion Zone Grain Size and Hardness of Pulsed Current Micro Plasma Arc Welded AISI 304L Sheets

Application of Hooke & Jeeves Algorithm in Optimizing Fusion Zone Grain Size and Hardness of Pulsed Current Micro Plasma Arc Welded AISI 304L Sheets

AISI 304L is an austenitic Chromium-Nickel stainless steel offering the optimum combination of corrosion resistance, strength and ductility. These attributes make it a favorite for many mechanical components. The paper focuses on de- veloping mathematical models to predict grain size and hardness of pulsed current micro plasma arc welded AISI 304L joints. Four factors, five level, central composite rotatable design matrix is used to optimize the number of experiments. The mathematical models have been developed by Response Surface Method (RSM) and its adequacy is checked by Analysis of Variance (ANOVA) technique. By using the developed mathematical models, grain size and hardness of the weld joints can be predicted with 99% confidence level. The developed mathematical models have been optimized us- ing Hooke and Jeeves algorithm to minimize grain size and maximize the hardness.

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EXPERIMENTAL INVESTIGATION OF MECHANICAL PROPERTY (TENSILE STRENGTH) OPTICAL INVESTIGATION (SEM & EDAX) OF AUSTENITIC STAINLESS STEEL GRADE (AISI 304L& AISI 310) WITH GAS METAL ARC WELDING (GMAW).

EXPERIMENTAL INVESTIGATION OF MECHANICAL PROPERTY (TENSILE STRENGTH) OPTICAL INVESTIGATION (SEM & EDAX) OF AUSTENITIC STAINLESS STEEL GRADE (AISI 304L& AISI 310) WITH GAS METAL ARC WELDING (GMAW).

[1] S. Kaewkuekool and B. Amornsin “A Study of Parameters Affecting to Mechanical Property of Dissimilar Welding between Stainless Steel (AISI 304) and Low Carbon Steel” Proceeding of 1st WSEAS International Conference on MATERIALS SCIENCE (MATERIALS’08). Bucharest, Romania. November 7-9, 2008 pp. 105109.

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The effect of substrate temperature of (Ti,A1)N coating on AISI 304L stainless steel and high speed steel using physical vapor deposition (PVD) method

The effect of substrate temperature of (Ti,A1)N coating on AISI 304L stainless steel and high speed steel using physical vapor deposition (PVD) method

Tujuan penyalutan (Ti,Al)N adalah untuk menghasilkan salutan yang baik di atas substrat keluli aloi untuk memperbaiki sifat-sifat mekanik keluli alat dalam aplikasi-aplikasi industri. Kesan suhu substrat adalah parameter yang sangat penting untuk mengkaji kesan kekuatan lekatan salutan (Ti,Al)N atas keluli aloi dalam pemendapan wap fizikal. Dalam kajian ini, dua jenis substrat telah dipilih: AISI 304L keluli tahan karat dan keluli kelajuan tinggi (HSS). Penyalutan telah dilakukan untuk kedua-dua jenis substrat dengan menggunakan empat suhu substrat yang berlainan iaitu 200 o C, 240 o C, 300 o C, dan 400 o C dengan 90 minit masa pemendapan, 200 watt kuasa DC, kadar aliran gas telah ditetapkan pada nisbah 10 sccm N 2 : 20

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Investigation on Various Aspects of using Activated Tio2 Flux in GTAW on Stainless Steel (AISI 304l)

Investigation on Various Aspects of using Activated Tio2 Flux in GTAW on Stainless Steel (AISI 304l)

quality production at minimum cost and increase productivity. TIG welding is the most important and common operation use for joining of two similar or dissimilar material with heating or applying the pressure or using the filler material for increasing productivity with less time and cost constrain. In the present research project, an attempt is made to understand the effect of TIG welding parameters such as welding speed, current and percentage of flux on responsive output parameters such as weld penetration and hardness of weld zone by using optimization philosophy. Generally, TIG welding welds thin sections for good surface finish. A major drawback in the process is having shallow penetration as compared to other arc welding process. This problem can be overcome by using active flux with conventional TIG welding. In the present study it is decided to investigate the optimization of A-TIG welding process on 304L stainless steel for an optimal parameter and the effect of various process parameters (welding current (I), welding speed(V), active flux. In the present study, efforts were made to improve the weld penetration and micro-hardness by applying the active flux and to optimize the process parameter. TiO 2 used as active flux in the present

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Investigation on Various Aspects of using Activated Tio2 Flux in GTAW on Stainless Steel (AISI 304l)

Investigation on Various Aspects of using Activated Tio2 Flux in GTAW on Stainless Steel (AISI 304l)

quality production at minimum cost and increase productivity. TIG welding is the most important and common operation use for joining of two similar or dissimilar material with heating or applying the pressure or using the filler material for increasing productivity with less time and cost constrain. In the present research project, an attempt is made to understand the effect of TIG welding parameters such as welding speed, current and percentage of flux on responsive output parameters such as weld penetration and hardness of weld zone by using optimization philosophy. Generally, TIG welding welds thin sections for good surface finish. A major drawback in the process is having shallow penetration as compared to other arc welding process. This problem can be overcome by using active flux with conventional TIG welding. In the present study it is decided to investigate the optimization of A-TIG welding process on 304L stainless steel for an optimal parameter and the effect of various process parameters (welding current (I), welding speed(V), active flux. In the present study, efforts were made to improve the weld penetration and micro-hardness by applying the active flux and to optimize the process parameter. TiO 2 used as active flux in the present

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Study of The Microstructure of Aisi Steel 304l in wz, Haz And Bm After Welding in the Gmaw Process

Study of The Microstructure of Aisi Steel 304l in wz, Haz And Bm After Welding in the Gmaw Process

After all the welding process, a sample was taken from each plate to perform the microstructural and macrostructural characterization, sizing FZand HAZ, stretching grain and dendritic package.Posterioly, polishing and attackBeharaof the steel samples, the microstructural characterization was performed by Lentz optical microscope. The capture of micrographs was performed by a camera attached to the microscope that sends messages to the computer using the software Image Pro Plus 4.0.For the said steel solidification process after the welding process, the desired level of overheating was observed, i.e. 10% above the liquidus temperature which usually represents the degree of superheat adopted in the foundry industry.The Vickers average microhardnessof the steel AISI 304L after the welding process of HAZ, FZ and BM were evaluated and displays a graph with the Microhardness Vickers values expressed in lines for the cross section of the plate. 1

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Analysis of friction stir welding process for 304l stainless steel

Analysis of friction stir welding process for 304l stainless steel

is the convection coefficient, is the emissivity of the plate surfaces, and = 5.67 x 10-12 2 ℃ Boltzmann constant. In the current model, a was taken to be 10 2 ℃ using an ambient was taken to be 0.17 for 304L In order to account for the conductive heat loss through the bottom surface of weld plates, a high overall heat transfer assumed. This assumption is based on the Chao, 2004; Yuh et al., 2003). The heat loss was modeled approximately by using heat flux loss

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DIC-aided biaxial fatigue tests of a 304L steel

DIC-aided biaxial fatigue tests of a 304L steel

The multiaxial fatigue tests without measurement of the local loading, currently used in purely elastic cases, are pointless in the present case. Consequently one proposes an experimental protocol including strain field measurements to determine the applied strains in the gauge zone during cyclic loading. It is then possible to quantify the loading in terms of the evolution of the strain amplitude with the number of cycles, and to compare these results with uniaxial HCF ones if an equivalent strain is chosen. The detection of crack initiation is also performed thanks to full-field strain measurements to assess test stop instead of standard specimen failure criterion. In order to get the maximum of information from each test, an in-situ micrographic device is also used. Eventually, the experimental campaign is also used to identify a damage model (DAMAGE2005) [4] and to better understand/model the multiaxial cyclic behavior of 304L steels.

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Electrochemical Study of the Corrosion Performance of AISI-309 and AISI-310 Exposed in NaVO3 at High Temperature

Electrochemical Study of the Corrosion Performance of AISI-309 and AISI-310 Exposed in NaVO3 at High Temperature

specimens for each measurement. The procedure was made according to ASTM Standards G1 and G31 [20-21]. Each specimens was immersed in the molten salt inside a silica 30 ml crucible under the same experimental conditions than the electrochemical test. The type of corrosion attack of the AISI-309 and the AISI-310 was obtained after observing the free corrosion products specimens through SEM. The morphology and distribution of reaction products over the surface was obtained from the working electrode without de-scaling from the Lp technique using a Microspec WDX-3PC system connected to a Zeiss DSM960 scanning electron microscope. The corrosion products were analyzed using a Siemens D-500 Diffractometer operating with Cu K radiation. The XRD spectra were interpreted using the Powder Diffraction Data File reference [22].

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finite element based analysis of friction stir welding process using ansys apdl

finite element based analysis of friction stir welding process using ansys apdl

Zhu and Chao [28] presented three-dimensional nonlinear thermal and thermo-mechanical simulations using finite element analysis code –WELDSIM on 304L stainless steel friction stir welded plates. Initially, a heat transfer problem was formulated as a standard boundary value problem and was solved using the inverse analysis approach. The total heat input and heat transfer coefficient were estimated by fitting the measured temperature data with the analytical model. Later, the transient temperature outputs from the first stage were used to determine residual stresses in the welded plates using a three- dimensional elastic plastic thermo-mechanical model. Convection and radiation were assumed to be responsible for heat loss to the ambient on the surface. Their model provided good match between experimental and predicted results. They reported that the residual stress in the welds after fixture release decreased significantly as compared to those before fixture release. They also reported that about 50% of the total mechanical energy developed by FSW machine was utilized in raising the temperature of the workpiece.

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Response Surface Approach for Optimization of Sinker Electric Discharge Machine Process Parameters on AISI 4140 Alloy Steel

Response Surface Approach for Optimization of Sinker Electric Discharge Machine Process Parameters on AISI 4140 Alloy Steel

It has been observed that there is very little or no work represented on AISI 4140 & no model is available to represent MRR for AISI 4140 with combination of work piece and electrodes And hence the study is focused on AISI 4140 machining cavilty with various input parameters like current, pulse on time, gap voltage, duty cycle to obtain better MRR.These have been done using Central composite design technique of design of experiments.Central composite design technique is design of experiments (DoE) utilized because the experimental design and analyze of the results can be done with less effort and expenses. Since the method enormously reduces the number of experiments, quality loss of results must be taken into account 12 .

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Effect of High Temperature Oxidation on AISI-...

Effect of High Temperature Oxidation on AISI-...

The objective of this research is to investigate experimentally the behavior of high temperature oxidation of AISI-3 I 6 & AISI-3 I 0 alloy steels in cyclic heating environment (700°C,800° C,900°C). AISI-3 I 6 & AISI-310 alloy steels is a Austenitic steels and its widely used in high temperature furnace, high pressure vessels, heat exchanger, condenser , high temperature fluid flow pipes etc. In this thesis firstly I studied & Discussed about Oxidation mechanisms, thermodynamics behind the oxidation, different kinds of oxidation kinetics, defects in oxide structure during scale formation. It contains details studies of oxidation behavior of metal, Fealloy & super alloy by many authors & researchers. For evaluation of high temperature oxidation behavior of AISI-3 I 6 & AISI-31 0 alloy steels perform the experiment in Silicon Carbide furnace tube in constant temperature in presence of air in cyclic condition for justify industrial environment because in industry like power plant, fertilizer plant & petroleum refinery etc are breakdown suddenly and temperature goes down so thermal stress are developed on surface. By change in weight ·measurement through electronic weight Balancing machine in each interval (I hour) Oxidation kinetics is determined. After determine the kinetics of AISI -3 I 6 & AISI -3 I 0 alloy steels in 700 °C, 800 °C & 900°C compare between them & determine best suitable material for particular condition. Also discussed the effects of different elements like Cr, Si, Mo, Ni & other alloys on oxidation & performance of alloy steels. The various factors like chemical composition of alloy, environmental condition, temperature, pressure, structure of alloy is discussed that influences of oxidation rate of metals & alloys.

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Modeling, Prediction And Optimization Of Dilution On Austenitic Stainless Steel (AISI 316L) Surfacing Of Low Carbon Steel (AISI 1020) Using Robotic Arc Welding

Modeling, Prediction And Optimization Of Dilution On Austenitic Stainless Steel (AISI 316L) Surfacing Of Low Carbon Steel (AISI 1020) Using Robotic Arc Welding

3.3 Bar plate length measurement (low carbon steel AISI 1020) 19 3.4 Bar plate cutting process (low carbon steel AISI 1020) 20 3.5 Low Carbon Steel (AISI 1020) plate 20 3.6 Arc welding robot (GMAW) 24

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