Slurry aluminizing of IN-800HT austenitic stainless steel and pure nickel. Correlations between experimental results and modelling of diffusion

2016 ◽  
Vol 67 (10) ◽  
pp. 1059-1067 ◽  
Author(s):  
F. Pedraza ◽  
M. Proy ◽  
C. Boulesteix ◽  
P. Krukovskyi ◽  
M. Metel
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Pure Nickel ◽  
Experimental Results

An Experimental Study of Progressive Strain Growth Due to Thermal-Stress Ratcheting

1978 ◽  
Vol 100 (2) ◽  
pp. 150-156 ◽  
Author(s):  
Takeo Uga
Keyword(s):  
Experimental Study ◽  
Stainless Steel ◽  
Thermal Stress ◽  
Austenitic Stainless Steel ◽  
Area Ratio ◽  
Experimental Results ◽  
Air Gaps ◽  
Load Variation ◽  
Incremental Strain ◽  
Progressive Strain

A special plate-shaped specimen with two symmetrical, straight air gaps in the center portion and a pair of holes for load chucks at the end portion is used for thermal-stress ratcheting experiments. Experimental results on strain growth due to thermal-stress ratcheting are presented for specimens made of types 304 and 316 austenitic stainless steel. The results cover cumulative and incremental strain growths under conditions of load variation and the effect of hot to cold bar area ratio.

Estimation of Elastic Follow-Up Behavior on 18Cr-8Ni Steel Using Simplified Inelastic Analysis

1994 ◽  
Vol 116 (2) ◽  
pp. 136-140 ◽  
Author(s):  
K. I. Kobayashi ◽  
Y. Saitoh ◽  
T. Udoguchi
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Constitutive Equation ◽  
Elastic Limit ◽  
Experimental Results ◽  
Cyclic Test ◽  
Test Material ◽  
Test Results ◽  
Inelastic Analysis

Elastic follow-up behavior was estimated using simplified inelastic methods newly developed, where only a constitutive equation of creep and a triangle of elastic follow-up were employed in the analysis. Then, uniaxial cyclic elastic follow-up tests were performed on an austenitic stainless steel SUS 304 at 700°C, and test results were compared with analyses. Since most of the starting points of elastic follow-up tests in the present experiments were beyond the elastic limit of the test material, the triangle of elastic follow-up had to be modified in the analyses. As a consequence, experimental results of elastic follow-up behavior for the first cycle agreed well with those analytically determined. Moreover, the test results obtained in subsequent cycles were found conservative compared with an extension of analyses that used the data obtained in the first cycle of cyclic test.

Studies on Numerical Simulation of Temperature Distribution in Laser Beam Welding of 304L Austenitic Stainless Steel

2019 ◽  
Vol 9 (1) ◽  
pp. 30-49
Author(s):  
Pramod Kumar ◽  
Amar Nath Sinha
Keyword(s):  
Numerical Simulation ◽  
Stainless Steel ◽  
Temperature Distribution ◽  
Austenitic Stainless Steel ◽  
Laser Welding ◽  
Research Work ◽  
Welding Process ◽  
Experimental Results ◽  
Bead Geometry ◽  
Good Agreement

A numerical simulation of temperature distribution in laser welding of 304L austenitic stainless steel have been investigated in the present research work. A three-dimensional Gaussian conical moving heat source has been implemented in the present numerical simulation using ANSYS software package. Temperature-dependent thermal physical properties of 304L austenitic stainless steel have been considered, which affects the temperature profile in the weldment. The effect of laser welding process parameters, namely, average beam power, welding speed, and laser spot diameter on weld bead geometry have been studied. The temperature distribution obtained from the numerical results at different positions away from the weld line were found to be in good agreement with the experimental results. The shape of the weld pool profile obtained through numerical simulation are in good agreement with the experimental results. Mechanical properties of the welded joint have also been studied. The ultimate tensile strength of the laser welded sample was equal to the base metal 304L austenitic stainless steel.

Fatigue Life Properties of Circumferentially-Notched, Type 304 Austenitic Stainless Steel in Hydrogen Gas

2017 ◽  
Author(s):  
Naoaki Nagaishi ◽  
Michio Yoshikawa ◽  
Saburo Okazaki ◽  
Hisao Matsunaga ◽  
Junichiro Yamabe ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Fatigue Life ◽  
Austenitic Stainless Steel ◽  
Notch Root ◽  
Ambient Air ◽  
Fatigue Tests ◽  
Hydrogen Gas ◽  
Experimental Results ◽  
Plastic Deformation Behavior ◽  
Type 304

Fatigue tests were performed using circumferentially-notched, round-bar specimens with a stress concentration factor, Kt, of 6.6 for Type 304, meta-stable, austenitic stainless steel. The tests were carried out in ambient air and in hydrogen gas at a pressure of 0.7 MPa at room temperature. In the relatively short fatigue life regime, the specimen showed a marked decrease in fatigue life. In contrast, in the longer-life regime, the specimen showed no degradation in fatigue life in hydrogen gas. The fatigue life curve and fatigue limit were predicted by assuming that the notch was equivalent to a circumferential crack, with the predicted values subsequently compared with the experimental results. With regard to the low-alloy steel, JIS-SCM435, it has been reported that the predictions were in good agreement with the experimental data [1]. However, there is a disparity between what was predicted and the actual experimental results in the case of Type 304. The reasons for this divergence are also discussed in relation to the yielding condition, as well as to the cyclic-plastic deformation behavior at the notch root.

Influence of Hydrogen-Charging on Oxidation of SUSF316L in Simulated BWR Environment

2010 ◽  
Author(s):  
Motoki Nakajima ◽  
Masayuki Hosokawa ◽  
Takanori Sugimura ◽  
Shin-ichi Komazaki
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Applied Stress ◽  
Hydrogen Content ◽  
Outer Layer ◽  
Oxide Particle ◽  
Experimental Results ◽  
Accelerated Oxidation ◽  
Oxidation Test ◽  
Cathodic Electrolysis

In order to clarify the effect of hydrogen on oxidation, the austenitic stainless steel SUSF316L was charged with hydrogen by the means of cathodic electrolysis and then the hydrogen-charged steel was subjected to the oxidation test in simulated BWR environment. Experimental results revealed that the size of oxide particle formed on the outer layer increased with increasing hydrogen content, resulting in the hydrogen accelerated oxidation (HAO). Additionally, the oxide of the hydrogen-charged steel was mainly NiFe2O4, whereas Fe3O4 was predominantly formed on the non-charged one. The effect of hydrogen on the oxidation was almost equivalent to that of applied stress.

Quxatitative Theory of Seasitization

1988 ◽  
Vol 125 ◽  
Author(s):  
Thomas M. Devine
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Carbide Precipitation ◽  
Experimental Results

ABSTRACTThe chromium composition along the grain boundaries of sensitized austenitic stainless steel are calculated using several different quantitative theories of sensitization. The results of the calculations are compared to measured values of the chromium composition along the grain boundary in an effort to assess the validity of the various theories. The experimental results point out two facts not previously emphasized in prior studies: (1) the amount of carbide precipitation required to sensitize austenitic stainless steel is small; (2) significant de-sensitization does not occur until after large amountsof carbide precipitation have occurred.

scholarly journals A Comparative Numerical Analysis on the Effect of Welding Consumables on the Ballistic Resistance of SMAW Joints of Armor Steel

2021 ◽  
Vol 11 (8) ◽  
pp. 3629
Author(s):  
Ambuj Saxena ◽  
Shashi Prakash Dwivedi ◽  
Shubham Sharma ◽  
Vishal Shankar Srivastava ◽  
Gursharan Singh ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Base Metal ◽  
Experimental Results ◽  
Impact Behavior ◽  
Depth Of Penetration ◽  
Element Analysis ◽  
Ballistic Resistance ◽  
Percentage Difference ◽  
Welding Consumables

In the present investigation, a comparative study of ballistic impact behavior of Armox 500T (base metal) and its weldments prepared by low hydrogen ferrite (weldment-1) and austenitic stainless steel (weldment-2) consumables against 7.62 AP bullet has been performed with the help of finite element analysis code Abaqus 2017. Further, the result is validated with the experimental results. The experiment has been performed on the base metal, weldment-1, and weldment-2 against 7.62 AP bullet. Further, a two-dimensional explicit model has been developed for given purpose to simulate the bullet penetration at such high strain rate (103 s−1). Both bullet and plate are considered as deformable. Experimental results revealed that the depth of penetration in the base metal, weldment-1, and weldment-2 is 10.93, 13.65, and 15.20 mm respectively. Further computational results revealed that the depth of penetration of base metal, weldment-1, and weldment-2 is 10.11, 12.87, and 14.60 mm, respectively. Furthermore, weldment-1 shows more resistance against 7.62 AP bullet than weldment-2 in experimentation as well as FEA results. The percentage difference between experimental and FEA results are less than 10% which shows the prediction capability of FEA models. A feasibility analysis has been presented for using the welding consumables to weld the Armox 500T plate. Finally, in terms of ballistic resistance, the low hydrogen ferrite consumables are more appropriate than austenitic stainless-steel electrodes.

Static Recrystallization Behavior of a Nitrogen Controlled Z2CN19-10 Austenitic Stainless Steel

2017 ◽  
Author(s):  
Min Luo ◽  
Chun Xu ◽  
Bing Zhou ◽  
Yan-hui Guo ◽  
Rong-bin Li
Keyword(s):  
Grain Size ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Static Recrystallization ◽  
Volume Fraction ◽  
Experimental Results ◽  
Strain Rates ◽  
Recrystallization Behavior ◽  
Hot Workability ◽  
Compression Tests

In order to increase the hot workability and provide proper hot forming parameters for nitrogen controlled Z2CN19-10 austenitic stainless steel, the static recrystallization behavior was investigated by double-pass hot compression tests in the temperature range of 950–1100°C, initial grain size of 72μm–152μm, and the strain rates of 0.01, 0.1, 1, and 5 s−1. The tests were conducted with inter-pass times varying between 1 and 100 s after achieving a pass strain of 0.05, 0.1, 0.15 and 0.2 in the first pass on a Gleeble-1500 thermo-mechanical simulator. The static recrystallization fraction has been predicted by the 2 % offset stress method and verified by metallographic observations. The metallographic results indicate the crystallized grains generate at the cross of the prior austenite grain boundary and grow up. Also the kinetics of static recrystallization behavior for Z2CN19-10 steel are proposed. Experimental results show that the volume fraction of static recrystallization increases with the increase of deformation temperature, strain rates, pass strain and interval time, while it decreases with the increase of initial grain size. According to the present experimental results, the activation energy (Q) and Avrami exponent (n) was determined as 199.02kJ/mol and 0.69. The established equations can give a reasonable estimate of the static recrystallization behavior for Z2CN19-10 steel.

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