Effect of plasma arc welding variables on fusion zone grain size and hardness of AISI 321 austenitic stainless steel

Plasma Arc Welding (PAW) is more tolerant to joint misalignment than Laser Beam Welding (LBW) at a lower cost [1]. The present study deals with the assessment of mechanical and metallurgical properties of butt welded 1.6 mm thick austenitic stainless steel similar (SS304 and SS304) by using plasma arc welding technique. Similar butt-Welded joints were analyzed by using mechanical (Bend test, Erichsen cup test, tensile test) and metallurgical (Optical macroscopic and microscopic images) characterization methods. The bead width and depth of the butt welded 1.6mm thick butt joined SS304 was analyzed by macroscopic and microscopic images [2]. The Erichsen cup test was conducted on the weld specimens. The indentation was made on the weld specimens. In the similar metal joint the depth of indentation is high, which shows that the similar metal joint has better formability. This makes them appropriate for practicing in the aircraft industries (engine parts), automotive sector (engine-parts and assemblies) chemical processing, food processing, turbine buckets, pumps and valve parts [3]. Keywords: SS304, PAW, Butt weld, Erichsen Cup Test, Microstructure

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Process Parameters Optimization using Kuhn-Tucker Conditions For Plasma Arc Welding Using Austenitic Stainless Steel Alloy-304l Plates

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.f8856.088619 ◽

2019 ◽

Vol 8 (6) ◽

pp. 4537-4541

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Objective Function ◽

Process Parameters ◽

Arc Welding ◽

Welding Process ◽

Plasma Arc Welding ◽

Plasma Arc ◽

Decision Variables ◽

Optimization Function

This paper is intended to evaluate the process parameters and decision variables for framing an optimization function to make the welding of Austenitic stainless steel alloy304L plates more reliable. This is made by finding the decision variables involved in the welding operation. It is always important for the process to be done effectively and efficiently. The present work evaluates various parameters involved in plasma arc welding, then were analyzed critically with respect to their boundary conditions. Then the optimization function is formulated, there after the constraints involved in making the welding process were found and also the conditions were defined. Next optimization of this objective function is done by appropriate methods. Here in this case the objective function involved multiple number of decision variables and also it has got mixed type of constraints. Hence in order to solve such problem Kuhn- tucker method is applied. And at the end the optimal values for the decision variables were found. By adapting these set of values in the welding the process got optimized.

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Dissimilar Metal Joining between Stainless Steel SUS304 and Carbon Steel SS400 Using Plasma Arc Welding Process

2018 2nd International Conference on Engineering Innovation (ICEI) ◽

10.1109/icei18.2018.8448663 ◽

2018 ◽

Author(s):

Jakkrit Thamprajamjit ◽

Prayoon Surin

Keyword(s):

Stainless Steel ◽

Carbon Steel ◽

Arc Welding ◽

Welding Process ◽

Plasma Arc Welding ◽

Plasma Arc ◽

Dissimilar Metal ◽

Dissimilar Metal Joining ◽

Arc Welding Process

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Effect of Mechanical Properties and Corrosion Behaviour of Martensitic Stainless Steel 410 1.6mm Butt Welded by Plasma Arc Welding

Materials Science Forum ◽

10.4028/www.scientific.net/msf.969.601 ◽

2019 ◽

Vol 969 ◽

pp. 601-606

Author(s):

M. Sree Arravind ◽

S. Ramesh Kumar ◽

S. Senthil Kumaran ◽

D. Venkateswarlu

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Tensile Test ◽

Arc Welding ◽

Martensitic Stainless Steel ◽

Laser Beam Welding ◽

Plasma Arc Welding ◽

Plasma Arc ◽

Butt Weld ◽

Welding Processes

Plasma Arc Welding (PAW) is one of the important arc welding processes used in electronics, medical, automotive and aerospace industries due its high accuracy and ability of welding any hard materials which is more tolerant to joint misalignment than Laser Beam Welding (LBW) at a lower cost. Thickness of 1.6mm plates were used to obtain full penetration and a strong joint with a very narrow Heat Affected Zone. The present study deals with the effect of mechanical and corrosion resistance properties of butt welded 1.6 mm thick martensitic stainless steel-similar (SS410 and SS410) joints made by plasma arc welding technique. Similar butt Welded joints were analyzed by using mechanical (Bend test, Erichsen cup test, Tensile test) characterization methods. Their corresponding corrosion resistance properties were also investigated by potentiodynamic polarization corrosion testing technique. The tensile strength was found to be 341 MPa for similar SS410 weld. During tensile test the failure occurred on the base metal on both similar joints Keywords: SS304; SS410; PAW; Butt weld; Erichsen Cup Test; Microstructure.

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