scholarly journals An Analysis of Microstructure and Mechanical Properties on Friction Stir Welded Joint of Dissimilar 304 Stainless Steel and Commercially Pure Aluminium

2017 ◽  
Vol 62 (3) ◽  
pp. 1813-1817 ◽  
Author(s):  
M. Balamagendiravarman ◽  
S. Kundu ◽  
S. Chatterjee
Keyword(s):  
Stainless Steel ◽  
Welded Joint ◽  
Traverse Speed ◽  
Optical Microscope ◽  
304 Stainless Steel ◽  
Interfacial Region ◽  
Mechanical And Thermal Properties ◽  
Pure Aluminium ◽  
Friction Stir ◽  
Commercially Pure

AbstractIn this study, friction stir welding of dissimilar 304 stainless steel and commercially pure aluminium was performed under the following condition of tool rotational speed 1000 rpm, traverse speed 60 mm/min and tool tilt angle 2 degree. Microstructural characterisation was carried out by optical microscope, scanning electron microscope (SEM). Optical images shows that the microstructural change is very minimum in steel side when compared to aluminium side due to the difference in mechanical and thermal properties. The intermetallic compound Al3Fe was observed at the interfacial region and stir region of the welded joint. The maximum ultimate tensile strength is 78% of commercially pure aluminium base metal. Microhardness profile was measured across the weld interface and the maximum value reaches at the stir zone due to the formation of intermettalics.

scholarly journals Evaluation of mechanical properties of friction stir welded commercially pure aluminium

2018 ◽  
Vol 172 ◽  
pp. 04003
Author(s):  
S. Suresh Kumar ◽  
B. Ravisankar ◽  
Vishnu Chandar. S ◽  
R.P. Dhivakar Raviram
Keyword(s):  
Travel Speed ◽  
Optical Microscope ◽  
Welding Parameters ◽  
Pure Aluminium ◽  
Base Metals ◽  
Testing Methods ◽  
Friction Stir ◽  
Destructive Test ◽  
Commercially Pure ◽  
Non Destructive

In this study, friction stir welding (FSW) of commercially pure aluminium is carried out. The main defects existing in this process are cavity, irregular material flow due to unsuitable selection of welding parameters. In this study, to reduce the defects by selecting suitable parameter and welding quality determined by mechanical testing methods and non-destructive testing methods. Welding is done with preheating the base metals and without preheating the base metals and their effects are analyzed with similar parameter. The parameters considered for this work are spindle rotational speed (rpm), tool travel speed (mm/min) and axial force (kN). The experimental results are evaluated by Destructive Test and Non-destructive test methods. The characterization study is performed by Optical microscope and Scanning Electron microscopy (SEM).

Microstructural characterization and in-process traverse force during friction stir welding of austenitic stainless steel

2019 ◽  
Vol 234 (5) ◽  
pp. 1031-1043
Author(s):  
Arshad Noor Siddiquee ◽  
Sunil Pandey ◽  
Mustufa Haider Abidi ◽  
Abdulrahman Al-Ahmari ◽  
Noor Zaman Khan ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Friction Stir Welding ◽  
Traverse Speed ◽  
304 Stainless Steel ◽  
Welding Parameters ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Friction Stir ◽  
Tool Shoulder ◽  
Shoulder Diameter

Welding AISI 304 stainless steel is challenging, especially as fusion-based welding processes (such as arc welding) severely undermine the material's corrosion resistance due to sensitization. Solid-state friction stir welding is one of the most suitable alternatives. Friction stir welding of high-strength high-softening materials such as AISI 304 is difficult mainly because of the non-availability of affordable tools and tool life. In this study, AISI 304 stainless steel was successfully butt-welded by friction stir welding. The experiments were performed using Taguchi's L27 orthogonal array. Shoulder diameter, tool r/min, and traverse speed were selected as the most influential welding parameters. A Tungsten Carbide (WC) tool was employed with a tapered pin profile. Defect-free joints were fabricated successfully for all the welding conditions. Microstructural examinations using optical microscopy and scanning electron microscopy revealed significant grain refinement in the stir zone and the presence of distinct structural features such as stepped, dual, and ditch in various characteristics zones. The presence of precipitates was also observed in samples and was confirmed via energy-dispersive X-ray spectroscopy analysis. The in-process traverse force was measured by a special arrangement of force measuring units attached to the work fixture. The traverse force data were analyzed and optimized. The results of an analysis of variance reveal that the traverse speed was the most important parameter, followed by tool r/min, interaction between the tool shoulder diameter and traverse speed, interaction between the tool shoulder diameter and tool r/min, and, finally, the tool r/min.

scholarly journals A Novel Approach of Friction Stir Cladding of Aluminum on Carbon Steel Plate; Experimental Investigation and Material Characterization

2021 ◽  
Author(s):  
Mohammad Mostafa Khalili ◽  
Mohammadreza Farahani ◽  
Ali Zohrehvand ◽  
Ahmad Aminzadeh
Keyword(s):  
Carbon Steel ◽  
Rotational Speed ◽  
Steel Plate ◽  
Traverse Speed ◽  
Optical Microscope ◽  
Process Conditions ◽  
Mechanical And Thermal Properties ◽  
Friction Stir ◽  
Metallurgical Investigation ◽  
Novel Approach

Abstract Cladding is usually used to improve the material functionality (i.e. corrosion, wear, and oxidation) and to improve the mechanical and thermal properties of the components in different industries. In this study, a new cladding approach based on the friction stir processing was successfully employed on carbon steel plate with 6061-T6 Aluminum alloy. The mechanical and metallurgical properties of the cladding layer were examined at different process parameters. Metallurgical investigation of ST/Al interface was also evaluated using the Scanning electron microscope (SEM) and Optical microscope (OM). Two alloys were mixed uniformly together in the proper process conditions. Based on the results, the decrease of rotational speed from 1200 rpm to 800 rpm at a constant traverse speed of 15 mm/min, the cladding strength increased from 3.7 KN to 4.8 KN. At constant rotational speed of 800 rpm, with an increase in traverse speed from 15 mm/min to 35 mm/min, the cladding strength increased from 4.8 KN to 6.6 KN.

scholarly journals Friction stir welding of 304 stainless steel using Ir based alloy tool

2011 ◽  
Vol 29 (4) ◽  
pp. 305-311 ◽  
Author(s):  
Tomoaki MIYAZAWA ◽  
Yuichi IWAMOTO ◽  
Tomohiro MARUKO ◽  
Hidetoshi FUJII
Keyword(s):  
Stainless Steel ◽  
Friction Stir Welding ◽  
304 Stainless Steel ◽  
Friction Stir ◽  
Alloy Tool

Study on the Microstructure and Mechanical Properties of Welding Joints of 7A05 Aluminum Alloy by FSW

2014 ◽  
Vol 496-500 ◽  
pp. 110-113
Author(s):  
Dong Gao Chen ◽  
Jin He Liu ◽  
Zhi Hua Ma ◽  
Wu Lin Yang
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Welding Speed ◽  
Welded Joint ◽  
Optical Microscope ◽  
Nugget Zone ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties ◽  
Welding Joints

The7A05 aluminum alloy of the 10mm thickness was welded by the friction stir welding. The microstructure and mechanical Properties of the welded joint was researched by the optical microscope, etc. The results showed: the microstructure of the weld nugget zone and the thermal mechanically affected zone were refined as the welding speed increasing when the rotate speed is constant. As the welding speed increasing the strength of extension of the welded joint is increasing at first and then stable basically. but the yield strength had no obvious change.

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