scholarly journals Improvement in the Design of Welded Joints of EN 235JR Low Carbon Steel by Multiple Response Surface Methodology

Metals ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 205 ◽  
Author(s):  
Ruben Lostado Lorza ◽  
Ruben Escribano García ◽  
María Martínez Calvo ◽  
Rodolfo Múgica Vidal
Keyword(s):  
Response Surface Methodology ◽  
Carbon Steel ◽  
Response Surface ◽  
Welded Joints ◽  
Low Carbon Steel ◽  
Multiple Response ◽  
Low Carbon ◽  
Multiple Response Surface Methodology

Investigation of Machining Parameters in CNC Turning of EN3 Low Carbon Steel Using Genetic Algorithm and Response Surface Methodology

2014 ◽  
Vol 592-594 ◽  
pp. 883-887
Author(s):  
R. Rave Kumar ◽  
M. Mohamed Abdul Hafeez ◽  
K. Velmanirajan ◽  
K. Nantha Kumar
Keyword(s):  
Genetic Algorithm ◽  
Surface Roughness ◽  
Response Surface Methodology ◽  
Carbon Steel ◽  
Response Surface ◽  
Low Carbon Steel ◽  
Cutting Parameters ◽  
Depth Of Cut ◽  
Machining Parameters ◽  
Low Carbon

Burrs are bottleneck of precision machining and automation production. Burrs are formed in every edges and faces, during the turning process, which affects the quality level of surface roughness. In this paper the experimental study of EN3 low carbon steel were carried out to minimize the surface roughness using response surface methodology and genetic algorithm. Tungsten Carbide was used as a cutting tool for this turning operation. Machined samples are examined under Scanning Electron Microscope (SEM) for burr formation. A wide variety of analysis between cutting parameters have been shown graphically. The minimization of burr was achieved and hence better surface quality was obtained by optimizing the cutting parameters like cutting speed, feed, and depth of cut, with the aid of Genetic Algorithm (GA) & Response Surface Methodology (RSM) Techniques.

Estimation of Some Mechanical Properties for Similar & Dissimilar Welded Joints

2014 ◽  
Vol 2 (1) ◽  
pp. 59-76
Author(s):  
Abdullah Daie'e Assi
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Austenitic Stainless Steel ◽  
Base Metal ◽  
Welded Joints ◽  
Plate Thickness ◽  
Low Carbon Steel ◽  
Dissimilar Metals ◽  
Low Carbon ◽  
Steel Type

This research deals with the choice of the suitable filler metal to weld the similar and dissimilar metals (Low carbon steel type A516 & Austenitic stainless steel type 316L) under constant conditions such as, plate thickness (6 mm), voltage (78 v), current (120 A), straight polarity. This research deals with three major parts. The first parts Four types of electrodes were used for welding of dissimilar metals (C.St A516 And St.St 316L) two from mild steel (E7018, E6013) and other two from austenitic stainless steel (E309L, E308L) various inspection were carried out include (Visual T., X-ray T., δ- Ferrite phase T., and Microstructures T.) and mechanical testing include (tensile T., bending T. and micro hardness T.) The second parts done by used the same parameters to welding similar metals from (C.St A516) Or (St.St 316L). The third parts deals with welding of dissimilar weldments (C.St And St.St) by two processes, gas tungsten are welding (GTAW) and shielded metal are welding (SMAW).        The results indicated that the spread of carbon from low carbon steel to the welding zone in the case of welding stainless steel elect pole (E309L) led to Configuration Carbides and then high hardness the link to high values ​​compared with the base metal. In most similar weldments showed hardness of the welding area is  higher than the hardness of the base metal. The electrode (E309L) is the most suitable to welding dissimilar metals from (C.St A516 With St.St 316L). The results also showed that the method of welding (GTAW) were better than the method of welding (SMAW) in dissimilar welded joints (St.St 316L with C.St A516) in terms of irregular shape and integrity of the welding defects, as well as characterized this weldments the high-lift and resistance ductility good when using the welding conditions are similar.

scholarly journals Microstructure and Properties of Heat Affected Zone in High-Carbon Steel after Welding with Fast Cooling in Water

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5059
Author(s):  
Michail Nikolaevich Brykov ◽  
Ivan Petryshynets ◽  
Miroslav Džupon ◽  
Yuriy Anatolievich Kalinin ◽  
Vasily Georgievich Efremenko ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Heat Affected Zone ◽  
Welded Joints ◽  
High Carbon Steel ◽  
Low Carbon Steel ◽  
Tensile Tests ◽  
Low Carbon ◽  
High Carbon ◽  
Mechanical Wear ◽  
Fast Cooling

The purpose of the research was to obtain an arc welded joint of a preliminary quenched high-carbon wear resistant steel without losing the structure that is previously obtained by heat treatment. 120Mn3Si2 steel was chosen for experiments due to its good resistance to mechanical wear. The fast cooling of welding joints in water was carried out right after welding. The major conclusion is that the soft austenitic layer appears in the vicinity of the fusion line as a result of the fast cooling of the welding joint. The microstructure of the heat affected zone of quenched 120Mn3Si2 steel after welding with rapid cooling in water consists of several subzones. The first one is a purely austenitic subzone, followed by austenite + martensite microstructure, and finally, an almost fully martensitic subzone. The rest of the heat affected zone is tempered material that is heated during welding below A1 critical temperature. ISO 4136 tensile tests were carried out for the welded joints of 120Mn3Si2 steel and 09Mn2Si low carbon steel (ASTM A516, DIN13Mn6 equivalent) after welding with fast cooling in water. The tests showed that welded joints are stronger than the quenched 120Mn3Si2 steel itself. The results of work can be used in industries where the severe mechanical wear of machine parts is a challenge.

Reliability Increase of Dissimilar Steel Welded Joints

2014 ◽  
Vol 698 ◽  
pp. 378-381 ◽  
Author(s):  
Alexandra Chevakinskaya ◽  
Aelita Nikulina ◽  
Natalia Plotnikova
Keyword(s):  
Carbon Steel ◽  
Welded Joints ◽  
Rail Steel ◽  
High Carbon Steel ◽  
Low Carbon Steel ◽  
High Strength ◽  
Hadfield Steel ◽  
Nickel Steel ◽  
Low Carbon ◽  
High Carbon

In this paper combined Hadfield steel - stainless steel - rail steel compounds are considered. Structural studies and estimation of mechanical properties showed that using an intermediate layer of low-carbon steel with 0.2 C wt. % and 5-20 mm thick between high-carbon steel and chromium-nickel steel in the formation of welded joints increases the reliability of connections by reducing the amount of high-strength zones as compared to compounds without a barrier layer.

Optimization of friction stir welding parameters using multiple response surface methodology

2015 ◽  
Vol 231 (7) ◽  
pp. 571-583 ◽  
Author(s):  
Morteza Ghaffarpour ◽  
Ahmad Aziz ◽  
Taha-Hossein Hejazi
Keyword(s):  
Response Surface Methodology ◽  
Friction Stir Welding ◽  
Response Surface ◽  
Welding Parameters ◽  
Multiple Response ◽  
Good Correspondence ◽  
Industrial Systems ◽  
Friction Stir ◽  
Multiple Response Surface Methodology ◽  
The Impact

Improving quality in today’s complicated industrial systems is gaining more and more importance every day. Since applying these systems costs a lot, companies should try to offer the best outcomes and processes possible. One of the products most applied is Tailor Welding Blanks, which is widely used in automobile, aerospace, and other industries. One of the best methods of producing Tailor Welding Blanks is Friction Stir Welding. Using this technology, sheets dissimilar in material and thickness can be joined. In this paper, the possibility of welding thin sheets of 5083-H12 and 6061-T6 aluminum alloy by Friction Stir Welding with the thickness of 1.5 mm is examined. To detect the impact of Friction Stir Welding parameters, i.e. rotational speed (r/min), linear speed (mm/ min), shoulder diameter (mm), and tilt angle (°), a Box-Behnken design was used and using multiple Response Surface Methodology values of robust optimization of tensile strength and elongation were derived. The optimization and experiment results were then compared. The results of the comparison showed a good correspondence.

Simulation of Structure Formation Processes of Dissimilar Steels Welded Joints Using an Intermediate Layer

2015 ◽  
Vol 788 ◽  
pp. 218-224
Author(s):  
Aelita Nikulina ◽  
Vadim Yu. Skeeba ◽  
Alexandra Chevakinskaya ◽  
Pavel Komarov
Keyword(s):  
Carbon Steel ◽  
Welded Joints ◽  
High Carbon Steel ◽  
Variable Parameter ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Nickel Steel ◽  
Low Carbon ◽  
High Carbon ◽  
Dissimilar Steels

This paper shows the results of solving a 3D problem to define types of structures and tensions which can appear during the butt contact welding process of dissimilar steels through low carbon steel inserts. The finite element method to calculate welded structures was used. The thickness of inserts was the main variable parameter. According to the results of numerical simulation using inserts can increase the reliability of welded joints between pearlitic high-carbon steel and austenitic chromium-nickel steel. The best result was obtained by using an insert with a thickness less than 20 mm. Structural studies of the welded joints between high-carbon steel and chromium-nickel steel through low-carbon inserts confirm the results of mathematical modeling.

A Study of Alkali Embrittlement Cracking of Low Carbon Steel Welded Joints

1991 ◽  
Vol 20-28 ◽  
pp. 2337-2345
Author(s):  
Jin Xue ◽  
Yu Wen Wang ◽  
Li Xia Zhou ◽  
Ji Gao Qi
Keyword(s):  
Carbon Steel ◽  
Welded Joints ◽  
Low Carbon Steel ◽  
Low Carbon

scholarly journals Effects of Thermal Treatment Processes (TTP) on the Tensile Properties of 0.165% Carbon Steel

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Yusuf Shuaib-Babata ◽  
Reuben Adebare Adewuyi
Keyword(s):  
Carbon Steel ◽  
Thermal Treatment ◽  
Tensile Stress ◽  
Tensile Properties ◽  
Welded Joints ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Welded Steel ◽  
Treatment Processes ◽  
Quench Hardening

In practice, welded low carbon steels do fail at the welded joints in use, thus leading to structural defects, material wastages, structural failure, and at times loss of lives, among others. This has been a great concern to practicing Engineers and Researchers. This study tends to proffer solution to this problem of concern through application of post welded thermal treatments. The welded samples were subjected to some post-weld thermal-treatment (TTP) operations such as normalizing, annealing and quench-hardening using different quenching media (Water, Palm oil, Quartz 5000 Total Engine oil, and Ground nut oil). The Tensile properties of the steel (such as tensile stress, tensile strain, and toughness) were determined before and after welding operations. At yield points, the thermal treatment processes adversely affected the strength of the welded steel. Meanwhile, normalizing and annealing processes enhanced the steel’s ductility and toughness, while quench-hardening process, irrespective of medium of quenching used reduced the steel toughness value. The toughness of the welded steel at the fracture point was also reduced through all the adopted thermal processes, except for normalizing process. The steel ultimate tensile stress and strain and its toughness values were equally reduced after TTP. Improvement of the properties of welded low carbon steel and the reduction of mechanical hazard were achieved through effective TTP. Thus, a better tensile property of welded low carbon steel was elicited by post-weld normalizing and annealing operations. Hence, butt-welded annealed and normalized low carbon steel specimens tend to be more resilient to failures at welded joints.

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