Journal articles: 'S420MC steel'

1

Bîrdeanu, Aurel Valentin, Alin Constantin Murariu, Horia Florin Daşcău, and Iuliana Duma. "Comparison between Modelled Influence of GMAW Parameters and Corresponding Mechanical Properties of Group 1 and 2 According to ISO/TR 15608 Steel T Joints." Key Engineering Materials 890 (June 23, 2021): 17–24. http://dx.doi.org/10.4028/www.scientific.net/kem.890.17.

Full text

Abstract:

Reproducibility in respect to welded structures realization is one of the main requirements for a wide variety of industrial applications. One of the international tendencies regarding the use of the steel is the replacing, in critical areas, of structural steels with high performance steel, e.g. with HSLA steels. The paper presents the results of a factorial designed experimental program focused on determining mathematical correlations between the GMAW process parameters for T joints of 4mm thick steel plates of structural (S235JR+AR according to SR EN 10025-2) and hot-rolled, high-strength low-alloy (HSLA) steel plates (S420MC according to EN 10025-4), respectively. A comparison between the obtained mathematical correlations that connect the welding parameters and the main mechanical characteristics is presented. The correlations can be used for applying the optimal combination of welding process parameters for realizing the T-joints of welded products.

APA, Harvard, Vancouver, ISO, and other styles

2

Murariu, Alin Constantin, and Aurel Valentin Bîrdeanu. "Correlation between GMAW Parameters and Mechanical Properties of Hot-Rolled, High-Strength Low-Alloy (HSLA) Steel Butt Joints." Key Engineering Materials 890 (June 23, 2021): 25–32. http://dx.doi.org/10.4028/www.scientific.net/kem.890.25.

Full text

Abstract:

In all industrial fields, the product requirements are more and more demanding. HSLA steels are designed to provide higher atmospheric corrosion resistance and improved mechanical properties than structural steels. The paper presents the results of an experimental program based on factorial design, applied to predict the mechanical properties of butt-welded joints of S420MC and S460MC hot-rolled, high-strength low-alloy (HSLA) steel plates with 2mm, 4mm and 8mm thickness. Gas Metal Arc Welding (GMAW) was used and correlations between the main process parameters and the related mechanical properties of the welded joints were found. Obtained mathematical correlations can be exploited to provide optimal combination of welding parameters to fit the quality requirements of the end-users for envisaged welded product.

APA, Harvard, Vancouver, ISO, and other styles

3

Lisiecki, A. "Welding of Thermomechanically Rolled Fine-Grain Steel by Different Types of Lasers/ Spawanie Stali Drobnoziarnistej Walcowanej Termomechanicznie Laserami Różnego Typu." Archives of Metallurgy and Materials 59, no. 4 (December 1, 2014): 1625–31. http://dx.doi.org/10.2478/amm-2014-0276.

Full text

Abstract:

Abstract The autogenous laser welding of 2.5 mm thick butt joints of thermomechanically rolled fine-grain steel grade S420MC was investigated. Butt joints were laser welded by the Yb:YAG Disk laser, emitted a circular laser beam with spot diameter of 200 μm at 1.03 μm wavelength, and also by the high power direct diode laser, emitted a rectangular beam with dimension of 1.8x6.8 mm at 808 nm wavelength. Different welding modes were identified for the lasers applied. The conduction welding mode was observed in whole of the diode laser welding parameters. While high quality joints, without any internal defects and characterized with satisfactory mechanical performance were produced in a wide range of parameters. The butt joints produced by Disk laser were welded at keyhole mode. In this case a slight tendency to weld porosity was found.

APA, Harvard, Vancouver, ISO, and other styles

4

Miklavec, M., J. Klemenc, A. Kostanjevec, and M. Fajdiga. "Fatigue strength of a hybrid joint formed between a PA6-GF60 polymer matrix and a S420MC steel insert." Materials & Design 51 (October 2013): 493–500. http://dx.doi.org/10.1016/j.matdes.2013.04.058.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Topçu, İlker Bekir, and Cenk Karakurt. "Properties of Reinforced Concrete Steel Rebars Exposed to High Temperatures." Research Letters in Materials Science 2008 (2008): 1–4. http://dx.doi.org/10.1155/2008/814137.

Full text

Abstract:

The deterioration of the mechanical properties of yield strength and modulus of elasticity is considered as the primary element affecting the performance of steel structures under fire. In this study, hot-rolled S220 and S420 reinforcement steel rebars were subjected to high temperatures to investigate the fire performance of these materials. It is aimed to determine the remaining mechanical properties of steel rebars after elevated temperatures. Steels were subjected to 20, 100, 200, 300, 500, 800, and950∘C temperatures for 3 hours and tensile tests were carried out. Effect of temperature on mechanical behavior of S220 and S420 were determined. All mechanical properties were reduced due to the temperature increase of the steel rebars. It is seen that mechanical properties of S420 steel was influenced more than S220 steel at elevated temperatures.

APA, Harvard, Vancouver, ISO, and other styles

6

Ivantsov, S. V., A. S. Nesvietova, and N. O. Kushnir. "Effect of chemical composition of S420M steel on strength indicators." Bulletin of Prydniprovs’ka State Academy of Civil Engineering and Architecture, no. 4 (September 13, 2020): 51–58. http://dx.doi.org/10.30838/j.bpsacea.2312.010920.60.655.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Fydrych, D., A. Świerczyńska, G. Rogalski, and J. Łabanowski. "Temper Bead Welding of S420G2+M Steel in Water Environment." Advances in Materials Science 16, no. 4 (December 1, 2016): 5–16. http://dx.doi.org/10.1515/adms-2016-0018.

Full text

Abstract:

Abstract The article presents the idea of the use of Temper Bead Welding (TBW) technique to improve the weldability of high strength steel at underwater wet welding conditions. Wet welding method with the use of covered electrodes is described. This work shows results of metallographic examinations and hardness measurements of samples of S420G2+M steel with weld beads performed under water. It has been shown that Temper Bead Welding technique may provide a way to reduce the hardness of the welds, thus is a useful method for improving weldability of high strength steel welded in underwater conditions. The optimum overlap of weld beads (pitch) was set of 55÷100%.

APA, Harvard, Vancouver, ISO, and other styles

8

Kaijalainen, Antti, Juho Mourujärvi, Juha Tulonen, Petteri Steen, and Jukka I. Kömi. "Improvement on Impact Toughness of Cold Formed S420 Steel by Direct Quenching." Materials Science Forum 1016 (January 2021): 648–53. http://dx.doi.org/10.4028/www.scientific.net/msf.1016.648.

Full text

Abstract:

The aim of this work is to study the effect cold forming rate (CFR) on the mechanical properties and microstructure of a conventional TMCP and a direct-quenched steel in 420 MPa strength level. The microstructure was characterized using FESEM-EBSD. Tensile properties and Charpy-V impact toughness were determined. As the CFR increased, the yield and tensile strength raised quite linearly with both steels. Yield strength values increased from 450 MPa (as-rolled material) to 700 MPa (25 % CFR). However, tensile strength increased less compared to yield strength. Uniform elongation decreased linearly till about 10 % CFR and total elongation till about 15 – 20 % CFR. The impact values decreased quite linearly in -40 °C and -60 °C test temperature when the cold forming rate increased. In longitudinal direction (L-T) the impact values were at high level at -40 °C and -60 °C with both steels with all CFR. In transverse direction (T-L) the impact results were lower. Impact energies were enhanced by direct quenching compared to conventional steel in every CFR stage. EBSD results showed no major difference between steels in the grain sizes in generally. However, cold forming decreased the grain size and increased low-angle grain boundaries in correlation with increasing CFR. Small size of the coarsest grains (d90%) usually indicate better toughness, however in this case the impact values were decreased even with smaller grain size as cold deformation occurs. On the other hand, the strength level increased with forming rate. Therefore, a brief discussion of the microstructural features controlling the impact toughness is given.

APA, Harvard, Vancouver, ISO, and other styles

9

Nie, Zhen, Yuanqi Li, and Yehua Wang. "Mechanical Properties of Steels for Cold-Formed Steel Structures at Elevated Temperatures." Advances in Civil Engineering 2020 (July 1, 2020): 1–18. http://dx.doi.org/10.1155/2020/9627357.

Full text

Abstract:

It is highly important to clarify the high-temperature mechanical properties in the design of cold-formed steel (CFS) structures under fire conditions due to the unique deterioration feature in material properties under fire environment and associated reduction to the mechanical performance of members. This paper presents the mechanical properties of widely used steels for cold-formed steel structures at elevated temperatures. The coupons were extracted from original coils of proposed full annealed steels (S350 and S420, with nominal yielding strengths 280 MPa and 350 MPa) and proposed stress relieving annealed steels (G500, with nominal yielding strength 500 MPa) for CFS structures with thickness of 1.0 mm and 1.2 mm, and a total of nearly 50 tensile tests were carried out by steady-state test method for temperatures ranging from 20 to 700°C. Based on the tests, material properties including the yield strengths, ultimate strengths, the elasticity modulus, and the stress-strain curve were obtained. Meanwhile, the ductility of steels for CFS structures was discussed. Then, the temperature-dependent retention factors of yield strengths and elasticity modulus were compared to those provided by design codes and former researchers. Finally, a set of prediction equations of the mechanical properties for steels for CFS structures at elevated temperatures was proposed depending on existing tests data.

APA, Harvard, Vancouver, ISO, and other styles

10

Mäkeläinen, Pentti, Jyri Outinen, and Jyrki Kesti. "Fire design model for structural steel S420M based upon transient-state tensile test results." Journal of Constructional Steel Research 48, no. 1 (October 1998): 47–57. http://dx.doi.org/10.1016/s0143-974x(98)00005-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Kovalev, Pavel, Sergey Riaboshuk, Aristotel Issagulov, Svetlana Kvon, and Vitaliy Kulikov. "Svetlana Kvon 2 and Vitaliy Kulikov 2,*." Metals 9, no. 2 (February 9, 2019): 203. http://dx.doi.org/10.3390/met9020203.

Full text

Abstract:

This work studied the effect of the amount of additives and the composition of refining slags on the metallurgical of steel grades of the S355G10, S420G2, and S460G2 types. The objects of study were samples of industrial melts after out-of furnace refining of steel with different amounts and nature of additives. Based on the results obtained, the recommended amounts of additives and the composition of the refining slag have been developed, which makes it possible to reduce the metal contamination with non-metallic inclusions.

APA, Harvard, Vancouver, ISO, and other styles

12

Sha, Chien-Kuo, and Hsien-Lung Tsai. "Hardfacing Characteristics of S42000 Stainless Steel by Using CO₂ Laser." Journal of Materials Engineering and Performance 10, no. 1 (February 1, 2001): 37–41. http://dx.doi.org/10.1361/105994901770345312.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Kwok, C. T., H. C. Man, and F. T. Cheng. "Cavitation erosion and pitting corrosion behaviour of laser surface-melted martensitic stainless steel UNS S42000." Surface and Coatings Technology 126, no. 2-3 (April 2000): 238–55. http://dx.doi.org/10.1016/s0257-8972(00)00533-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Sha, Chien-Kuo, and Hsien-Lung Tsai. "Hardfacing characteristics of S42000 stainless steel powder with added silicon nitride using a CO2 laser." Materials Characterization 52, no. 4-5 (July 2004): 341–48. http://dx.doi.org/10.1016/j.matchar.2004.06.013.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Lišková, Anna, Mária Mihaliková, Lukáš Dragošek, Róbert Kočiško, and Róbert Bidulský. "MECHANICAL PROPERTIES LASER WELDING AUTOMOTIVE STEEL SHEETS." Acta Metallurgica Slovaca 21, no. 3 (September 30, 2015): 195. http://dx.doi.org/10.12776/ams.v21i3.611.

Full text

Abstract:

<p>The experimental and theoretical investigation deals with laser welding of automotive thin steel sheets. As tested materials were used Interstitial Free Steel (IF) from type of Hight Strength Low Alloy (HSLA) and the second is S420 steel (Micro-Alloyed Steel). Changes of properties of these materials were carried out by static dynamic conditions. The structure of welded joints these two materials were investigated by metallographic analysis. Metallographic analysis confirmed the formation of favourable structure of weld metal and heat affected zone. Obtained results showed that by laser welding it is possible to create the high quality welded joints with positive mechanical properties on used in automotive industry.</p>

APA, Harvard, Vancouver, ISO, and other styles

16

Aumpiem, Adisak, and Asa Prateepasen. "Implementation of Cast Steel Nodes by Considering of CTOD Value." Materials Science Forum 883 (January 2017): 87–91. http://dx.doi.org/10.4028/www.scientific.net/msf.883.87.

Full text

Abstract:

Cast steel nodes are being increasingly popular in steel structure joint application. Cast steel node joint consists of two parts: casting itself and the welds between the node and the steel member. The fatigue resistances of these two parts are very different. This paper presents a using of the MSF (Main Structure Farm) casting nodes S420 instead of carbon steel plate by considering the Crack Tip Opening Displacement (CTOD) value and the percentage of coarse grain. The sampling work piece from the weld and heat affected zone (HAZ) were tested and compared the CTOD value and mechanical properties to the standard. This result shows that the CTOD values are under allowable value. After that, a finite element (FEM) program was corporately used to simulate. It is acceptable cast node even the CTOD is undesirable. The benefit of the paper is to show the procedure to prove cast steel nodes by using CTOD.

APA, Harvard, Vancouver, ISO, and other styles

17

Mihaliková, Mária, Vladimír Girman, and Anna Lišková. "Static and dynamic tensile characteristics of S420 and IF steel sheets." Materiali in tehnologije 50, no. 4 (August 12, 2016): 543–46. http://dx.doi.org/10.17222/mit.2015.125.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Mesjasz, A., and J. Piątkowski. "The Reasons of Steam Pipeline Elbow Rupture." Archives of Foundry Engineering 16, no. 3 (September 1, 2016): 67–70. http://dx.doi.org/10.1515/afe-2016-0052.

Full text

Abstract:

Abstract In the paper the reasons for steam pipeline’s elbow material rupture, made of steel 13CrMo4-5 (15HM) that is being used in the energetics. Based on the mechanical properties in the ambient temperature (Rm, Rp0,2 and elongation A5) and in the increased temperature (Rp0,2t) it was found, that the pipeline elbow’s material sampled from the ruptured area has lower Rp0,2 i Rp0,2t by around 2% than it is a requirement for 13CrMo4-5 steel in it’s base state. The damage appeared as a result of complex stress state, that substantially exceeded the admissible tensions, what was the consequence of considerable structure degradation level. As a result of the microstructure tests on HITACHI S4200 microscope, the considerable development of the creeping process associates were found. Also the advances progress of the microstructure degradation was observed, which is substantial decomposition of bainite and multiple, with varied secretion size, and in most cases forming the micro cracks chains. With the use of lateral micro sections the creeping voids were observed, that creates at some places the shrinkage porosities clusters and micro pores.

APA, Harvard, Vancouver, ISO, and other styles

19

Chatziioannou, Konstantinos, Spyros A. Karamanos, and Yuner Huang. "Ultra low-cycle fatigue performance of S420 and S700 steel welded tubular X-joints." International Journal of Fatigue 129 (December 2019): 105221. http://dx.doi.org/10.1016/j.ijfatigue.2019.105221.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Arroyo, B., L. Andrea, P. González, J. A. Álvarez, S. Cicero, R. Lacalle, and A. Fernández. "Application of the incremental step loading technique to Small Punch Tests on S420 steel in acid environments." Procedia Structural Integrity 28 (2020): 180–87. http://dx.doi.org/10.1016/j.prostr.2020.10.023.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

González, Pablo, Sergio Cicero, Borja Arroyo, and José Álvarez. "Environmentally Assisted Cracking Behavior of S420 and X80 Steels Containing U-notches at Two Different Cathodic Polarization Levels: An Approach from the Theory of Critical Distances." Metals 9, no. 5 (May 16, 2019): 570. http://dx.doi.org/10.3390/met9050570.

Full text

Abstract:

This paper analyzes, using the theory of critical distances, the environmentally assisted cracking behavior of two steels (S420 and API X80) subjected to two different aggressive environments. The propagation threshold for environmentally assisted cracking (i.e., the stress intensity factor above which crack propagation initiates) in cracked and notched specimens (KIEAC and KNIEAC) has been experimentally obtained under different environmental conditions. Cathodic polarization has been employed to generate the aggressive environments, at 1 and 5 mA/cm2, causing hydrogen embrittlement on the steels. The point method and the line method, both belonging to the theory of critical distances, have been applied to verify their capacity to predict the initiation of crack propagation. The results demonstrate the capacity of the theory of critical distances to predict the crack propagation onset under the different combinations of material and aggressive environments.

APA, Harvard, Vancouver, ISO, and other styles

22

Önal, Mehmet Mustafa. "Strengthening Reinforced Concrete Beams with CFRP and GFRP." Advances in Materials Science and Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/967964.

Full text

Abstract:

Concrete beams were strengthened by wrapping the shear edges of the beams twice at 45° in opposite directions by either carbon fiber reinforced polymer (CFRP) or glass fiber reinforced polymer (GFRP). The study included 3 CFRP wrapped beams, 3 GFRP wrapped beams, and 3 control beams, all of which were 150×250×2200 mm and manufactured with C20 concrete and S420a structural steel at the Gazi University Technical Education Faculty labs, Turkey. Samples in molds were cured by watering in the open air for 21 days. Four-point bending tests were made on the beam test specimens and the data were collected. Data were evaluated in terms of load displacement, bearing strength, ductility, and energy consumption. In the CFRP and GFRP reinforced beams, compared to controls, 38% and 42%, respectively, strength increase was observed. In all beams, failure-flexural stress occurred in the center as expected. Most cracking was observed in the flexural region 4. A comparison of CFRP and GFRP materials reveals that GFRP enforced parts absorb more energy. Both materials yielded successful results. Thicker epoxy application in both CFRP and GFRP beams was considered to be effective in preventing break-ups.

APA, Harvard, Vancouver, ISO, and other styles

23

Preedawiphat, Pavaret, Asa Prateepasen, and Mai Noipitak. "Influence of Material Coating on Stress Measurement by Ultrasonic Surface Wave (Part 1)." Advanced Materials Research 717 (July 2013): 227–32. http://dx.doi.org/10.4028/www.scientific.net/amr.717.227.

Full text

Abstract:

Ultrasonic surface wave have been implemented to measure or predict the existing stress on material. Surface wave velocity shows linearly increase with stress applied in material. However, various applications were coated their surfaces with high corrode resistance material for example paint or aluminum thermal sprays. It may cause the change of the velocity of surface wave and lead to miss prediction. This paper presents the effect of material coating on surface wave velocity and its attenuations. Paint and Aluminum thermal spray coated on low carbon steel graded S420 (EN 10025 Standard) in the range of 100-500 micron. Through transmission ultrasonic surface wave was applied to measure the velocities change. Their frequencies are 2.25 and 5 MHz respectively. It was found that coating thickness show effect on sound velocity and sound wave attenuation. The benefit is to know the effect of coating and to approve the accuracy of stress measurement by ultrasonic wave.

APA, Harvard, Vancouver, ISO, and other styles

24

Wang, Weizhan, Zhigang Chen, and Shunshan Feng. "Effect of CeO2 on Impact Toughness and Corrosion Resistance of WC Reinforced Al-Based Coating by Laser Cladding." Materials 12, no. 18 (September 8, 2019): 2901. http://dx.doi.org/10.3390/ma12182901.

Full text

Abstract:

WC reinforced Al-based coating with added CeO2 was prepared on the surface of S420 steel by laser cladding. The microstructure and structure of the coatings were analyzed by scanning electron microscope, X-ray diffractometer and optical profiler. The mechanical properties and corrosion properties of the coatings were studied by microhardness tester, friction and wear tester, Charpy impact tester, and electrochemical workstation. The results show that the coating is mainly composed of Al-phase, continuous-phase, and hard reinforced-phase WC, and the coating and substrate show good metallurgical bonding. When the content of CeO2 is 1%, the fine grain strengthening effect is obvious, and the impact toughness of the coating is obviously improved. Appropriate amount of rare earth CeO2 can significantly improve the hardness of the coating. When the content of CeO2 is more than 1%, the wear resistance of the coating decreases. The coating prepared with different CeO2 content has higher impedance and corrosion resistance than that of the substrate. At 1% CeO2 content, the coating has the best corrosion resistance.

APA, Harvard, Vancouver, ISO, and other styles

25

"YMPRESS LASER S420MC." Alloy Digest 65, no. 6 (June 1, 2016). http://dx.doi.org/10.31399/asm.ad.sa0758.

Full text

Abstract:

Abstract Ympress Laser S420MC (EN 10149-2) is a hot-rolled, high-strength, low-alloy steel with 420 MPa minimum yield strength. It is optimized for efficient laser cutting and post-cut processing. This datasheet provides information on composition, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming. Filing Code: SA-758. Producer or source: Tata Steel.

APA, Harvard, Vancouver, ISO, and other styles

26

"DOMEX 420 MC." Alloy Digest 57, no. 11 (November 1, 2008). http://dx.doi.org/10.31399/asm.ad.sa0587.

Full text

Abstract:

Abstract Domex 420 MC is a hot-rolled, high-strength low-alloy (HSLA) steel for cold forming operations. It is available in thicknesses of 1.80-15.00 mm. The alloy meets or exceeds the requirements of S420MC in EN 10149-2. Applications include a wide range of fabricated components and steel structures. This datasheet provides information on composition, physical properties, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming, heat treating, and joining. Filing Code: SA-587. Producer or source: SSAB Swedish Steel Inc.

APA, Harvard, Vancouver, ISO, and other styles

27

"DOMEX 420MCD." Alloy Digest 59, no. 2 (February 1, 2010). http://dx.doi.org/10.31399/asm.ad.sa0614.

Full text

Abstract:

Abstract Domex 420MCD is part of the Domex family of cold-forming steels, which are thermomechanically rolled and where all the processing is carefully controlled. The alloy is used in cold-formed and welded products. Domex 420 MCD meets or exceeds the demands for steel S420 MC in EN-10149-2. This datasheet provides information on composition, physical properties, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming, heat treating, and joining. Filing Code: SA-614. Producer or source: SSAB Swedish Steel Inc.

APA, Harvard, Vancouver, ISO, and other styles

28

"UGIMA 4021/UGIMA 420A." Alloy Digest 48, no. 9 (September 1, 1999). http://dx.doi.org/10.31399/asm.ad.ss0760.

Full text

Abstract:

Abstract UGIMA 4021 and UGIMA 420A are identical grades that are differently named for the European and North American markets, respectively. The grade is similar to UNS S42000 and is a hardenable martensitic stainless steel with a higher carbon content than type 410. UGIMA 4021/420A contain an addition of calcium by the UGIMA process. This steelmaking technique produces malleable oxide inclusions with a low melting point. The inclusions then lubricate the metal-tool interface in machining and improve productivity. This datasheet provides information on composition. It also includes information on corrosion resistance as well as heat treating and machining. Filing Code: SS-760. Producer or source: Ugine-Savoie.

APA, Harvard, Vancouver, ISO, and other styles

29

Salahi, Salar, Mostafa Kazemipour, and Ali Nasiri. "Effect of Uniaxial Tension-Induced Plastic Strain on the Microstructure and Corrosion Behavior of 13Cr Martensitic Stainless Steel." Corrosion 76, no. 12 (August 15, 2020). http://dx.doi.org/10.5006/3516.

Full text

Abstract:

This study aims to understand the correlation between the manufacturing process-induced plastic deformation, microstructure, and corrosion behavior of a 13Cr martensitic stainless steel tubing material (UNS S42000). Comparisons were made between the microstructure, crystallographic orientation, and corrosion performance of a texture-free, heat-treated sample and uniaxially tensioned samples to the elongations of 5% and 22%. Cyclic potentiodynamic polarization tests and electrochemical impedance spectroscopy were performed on all samples in aerated 3.5 wt% NaCl electrolyte at room temperature. Overall, the corrosion resistance of the samples was found to decrease with increasing deformation level. A more stable and higher corrosion potential and pitting potential values with a better stability of the passive film were derived for the nondeformed sample, whereas the 5% and 22% elongated samples exhibited lower corrosion and pitting potential values and were characterized by having a less stable passive layer. All samples consistently revealed micropit formation on the lath boundaries where a high concentration of chromium carbide precipitates was detected. Increasing the level of plastic strain in 13Cr stainless steel was found to enlarge the size of sensitized regions along the matrix/coarse chromium carbide precipitates interface, leading to more regions susceptible to initiation and propagation of pitting.

APA, Harvard, Vancouver, ISO, and other styles

30

"Research and Modelling of Surface Roughness, Cutting Forces and I-kaz Coefficients for S42C in Turning using Response Surface Methodology." International Journal of Innovative Technology and Exploring Engineering 8, no. 12S2 (December 31, 2019): 608–20. http://dx.doi.org/10.35940/ijitee.l1109.10812s219.

Full text

Abstract:

This paper presents the optimization in machining processes on the cutting parameters for the S45C in turning process using the response surface method (RSM). The experimental work conducted investigates the influence of cutting parameters on statistical analysis of signals and surface quality. The paper also presents a statistical analysis of signal processing. The cutting force was measured during machining using the Kistler 9129AA dynamometer to monitor the force signals and the data was analyzed using the I-kazTM method of statistical analysis. This statistical analysis was used to assess the effect of force signals during the machining process. The RSM models for Ra and Rz, and Ideveloped with ANOVA and multiple regression equations. The models also were compared and validated with the predicted and measured of Ra and Rz values, and I-kaz coefficients. The optimal configuration of cutting parameters was observed at 200 m/min, 0.1 mm/rev and 0.521 mm with desirability of 95.9%. It is observed that the models developed are suggested to be utilized for predicting surface roughness values and I-kaz coefficients for the machining of S45C steel.

APA, Harvard, Vancouver, ISO, and other styles

31

Daddi-Moussa-Ider, Abdallah, Hartmut Löwen, and Benno Liebchen. "Hydrodynamics can determine the optimal route for microswimmer navigation." Communications Physics 4, no. 1 (February 2, 2021). http://dx.doi.org/10.1038/s42005-021-00522-6.

Full text

Abstract:

AbstractAs compared to the well explored problem of how to steer a macroscopic agent, like an airplane or a moon lander, to optimally reach a target, optimal navigation strategies for microswimmers experiencing hydrodynamic interactions with walls and obstacles are far-less understood. Here, we systematically explore this problem and show that the characteristic microswimmer-flow-field crucially influences the navigation strategy required to reach a target in the fastest way. The resulting optimal trajectories can have remarkable and non-intuitive shapes, which qualitatively differ from those of dry active particles or motile macroagents. Our results provide insights into the role of hydrodynamics and fluctuations on optimal navigation at the microscale, and suggest that microorganisms might have survival advantages when strategically controlling their distance to remote walls.

APA, Harvard, Vancouver, ISO, and other styles

32

Omran, Ahmed S., Doaa M. KamalELDin, and Walid H. Nofal. "Pre-emptive quadratus lumborum block for laparoscopic bariatric surgery: a prospective randomized controlled study." Ain-Shams Journal of Anesthesiology 13, no. 1 (March 16, 2021). http://dx.doi.org/10.1186/s42077-021-00140-y.

Full text

Abstract:

Abstract Background Laparoscopic bariatric surgeries in morbidly obese patients have shown a steep rise recently. Quadratus lumborum block (QLB) has been used to decrease pain in various kinds of surgeries. The purpose of this study is to evaluate the ability of pre-emptive QLB to decrease intra- and postoperative pain and opioid consumption. Results Intraoperative HR and MAP were significantly lower in the QLB group starting 20 min after block initiation. Intraoperative additional fentanyl requirements, postoperative NRS scores at rest and with movement, nausea and vomiting and the consumption of rescue analgesia were also significantly lower in the QLB group for 12 h. Early ambulation was recorded in the QLB group. Conclusions Our results suggest that bilateral posterior QLB reduced intra- and postoperative pain during laparoscopic bariatric surgeries and decreased opioid requirements and side effects.

APA, Harvard, Vancouver, ISO, and other styles

33

Braeckman, Ulrike, Francesca Pasotti, Ralf Hoffmann, Susana Vázquez, Angela Wulff, Irene R. Schloss, Ulrike Falk, et al. "Glacial melt disturbance shifts community metabolism of an Antarctic seafloor ecosystem from net autotrophy to heterotrophy." Communications Biology 4, no. 1 (January 29, 2021). http://dx.doi.org/10.1038/s42003-021-01673-6.

Full text

Abstract:

AbstractClimate change-induced glacial melt affects benthic ecosystems along the West Antarctic Peninsula, but current understanding of the effects on benthic primary production and respiration is limited. Here we demonstrate with a series of in situ community metabolism measurements that climate-related glacial melt disturbance shifts benthic communities from net autotrophy to heterotrophy. With little glacial melt disturbance (during cold El Niño spring 2015), clear waters enabled high benthic microalgal production, resulting in net autotrophic benthic communities. In contrast, water column turbidity caused by increased glacial melt run-off (summer 2015 and warm La Niña spring 2016) limited benthic microalgal production and turned the benthic communities net heterotrophic. Ongoing accelerations in glacial melt and run-off may steer shallow Antarctic seafloor ecosystems towards net heterotrophy, altering the metabolic balance of benthic communities and potentially impacting the carbon balance and food webs at the Antarctic seafloor.

APA, Harvard, Vancouver, ISO, and other styles

34

Lingos, Panagiotis C., Myron D. Kapetanakis, Jigang Wang, and Ilias E. Perakis. "Light-wave control of correlated materials using quantum magnetism during time-periodic modulation of coherent transport." Communications Physics 4, no. 1 (March 25, 2021). http://dx.doi.org/10.1038/s42005-021-00561-z.

Full text

Abstract:

AbstractLight–wave quantum electronics utilizes the oscillating carrier wave to control electronic properties with intense laser pulses. Without direct light–spin interactions, however, magnetic properties can only be indirectly affected by the light electric field, mostly at later times. A grand challenge is how to establish a universal principle for quantum control of charge and spin fluctuations, which can allow for faster-than-THz clock rates. Using quantum kinetic equations for the density matrix describing non–equilibrium states of Hubbard quasiparticles, here we show that time–periodic modulation of electronic hopping during few cycles of carrier–wave oscillations can dynamically steer an antiferromagnetic insulating state into a metalic state with transient magnetization. While nonlinearities associated with quasi-stationary Floquet states have been achieved before, magneto–electronics based on quasiparticle acceleration by time–periodic multi–cycle fields and quantum femtosecond/attosecond magnetism via strongly–coupled charge–spin quantum excitations represents an alternative way of controlling magnetic moments in sync with quantum transport.

APA, Harvard, Vancouver, ISO, and other styles

35

Rosenbusch, Hannes, Maya Aghaei, Anthony M. Evans, and Marcel Zeelenberg. "Psychological trait inferences from women’s clothing: human and machine prediction." Journal of Computational Social Science, September 22, 2020. http://dx.doi.org/10.1007/s42001-020-00085-6.

Full text

Abstract:

Abstract People use clothing to make personality inferences about others, and these inferences steer social behaviors. The current work makes four contributions to the measurement and prediction of clothing-based person perception: first, we integrate published research and open-ended responses to identify common psychological inferences made from clothes (Study 1). We find that people use clothes to make inferences about happiness, sexual interest, intelligence, trustworthiness, and confidence. Second, we examine consensus (i.e., interrater agreement) for clothing-based inferences (Study 2). We observe that characteristics of the inferring observer contribute more to the drawn inferences than the observed clothes, which entails low to medium levels of interrater agreement. Third, the current work examines whether a computer vision model can use image properties (i.e., pixels alone) to replicate human inferences (Study 3). While our best model outperforms a single human rater, its absolute performance falls short of reliability conventions in psychological research. Finally, we introduce a large database of clothing images with psychological labels and demonstrate its use for exploration and replication of psychological research. The database consists of 5000 images of (western) women’s clothing items with psychological inferences annotated by 25 participants per clothing item.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'S420MC steel'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles