scholarly journals Effect of Friction Stir Welding Process on Crystallinity and Degradation of Polypropylene

2020 ◽  
Vol 55 (2) ◽  
Author(s):  
Bambang Kusharjanta ◽  
Rudy Soenoko ◽  
Anindito Purnowidodo ◽  
Yudy Surya Irawan
Keyword(s):  
Friction Stir Welding ◽  
Base Material ◽  
Welding Process ◽  
Friction Stir ◽  
Friction Stir Welding Process ◽  
Type D ◽  
Degradation Temperature ◽  
Degradation Data ◽  
Crystallinity Changes ◽  
Tool Pin

The aim of this study was to investigate the crystallinity changes and degradation of polypropylene due to heat generated by friction stir welding, i.e., heat generated by friction between the rotation tool and the welded materials. The tool pin was rotated at 620 rpm in the welding process. The travelling speed was varied between 7.3 mm/minute and 13 mm/minute. A cylindrical tool pin, 4.5 mm in diameter and 5.7 mm in length, was used in this experiment. The shoulder dimension was 18 mm in diameter and 90 mm in length. A conventional milling machine was used in the friction stir welding process. The crystallinity test was carried out with X-ray diffraction, hardness was observed using a Shore Type-D durometer, and polymer degradation data was obtained by thermogravimetry analysis. The areas compared were base material, weld nugget area, and thermomechanical affected zone. The results showed that there was a change in the percentage of crystallinity in areas that had undergone friction stir welding, and that the change was inversely proportional to the traveling rate of the friction stir welding process. The friction stir welding process was affected by the initial degradation temperature and hardness property of the polypropylene. This result shows that it is possible to choose specific parameters of friction stir welding in order to obtain good weld joint properties.

Proposing a new relation for selecting tool pin length in friction stir welding process

Measurement ◽  
2018 ◽  
Vol 129 ◽  
pp. 112-118 ◽  
Author(s):  
Noor Zaman Khan ◽  
Arshad Noor Siddiquee ◽  
Zahid A. Khan
Keyword(s):  
Friction Stir Welding ◽  
Welding Process ◽  
Friction Stir ◽  
Friction Stir Welding Process ◽  
Tool Pin

Microstructural Characterization and Mechanical Properties in Friction Stir Welding of AA6061 and AA6101 Aluminum Alloys

2021 ◽  
Vol 40 ◽  
pp. 1-11
Author(s):  
Gagandeep Singh ◽  
Khushdeep Goyal ◽  
Baljinder Ram ◽  
Bal Krishan
Keyword(s):  
Friction Stir Welding ◽  
Base Material ◽  
Welding Process ◽  
Microstructural Characterization ◽  
Friction Stir ◽  
Tool Pin Profile ◽  
Fine Grain ◽  
Metal Plates ◽  
Frictional Forces ◽  
Tool Pin

In this research paper, two different metal plates of aluminum alloy viz. AA6061 and AA6101 were welded with friction stir welding process. Round tool and square tool pin profiles were used to weld the alloys. Weld microstructures, hardness, and tensile properties were evaluated in as-welded condition. The tensile strength of the joints fabricated with round tool pin profile were lower than the square tool pin profile because of the pulsating effect, in square tool pin profile this effect was produced along with the higher frictional forces. The micro-hardness of friction stir zone was higher than the base material due to active recrystallization occurrence which resulted in fine grain size in case of weld joint with round pin profile. Microstructure indicated uniformly distribution of materials with minimum heat affected zone and dense welded zone without any defects.

Multi Response Optimization of Submerged Friction Stir Welding Process Parameters Using TOPSIS Approach

2015 ◽  
Author(s):  
Senthil Kumar Velukkudi Santhanam ◽  
Lokesh Rathinaraj ◽  
Rathinasuriyan Chandran ◽  
Shankar Ramaiyan
Keyword(s):  
Friction Stir Welding ◽  
Process Parameters ◽  
Welding Process ◽  
Fusion Welding ◽  
Friction Stir ◽  
Friction Stir Welding Process ◽  
Response Characteristics ◽  
Response Optimization ◽  
Topsis Approach ◽  
Tool Pin

Friction stir welding (FSW) is a solid-state welding process which is used to join high-strength aircraft aluminum alloys and other metallic alloys which are difficult to weld by conventional fusion welding. In this paper, AA6063-O alloy of 6mm thickness was taken and friction stir welded under the water in order to improve the joint properties. The process parameters considered as rotational speed, welding speed and tool pin profiles (cylindrical, threaded and tapered) are optimized with multi response characteristics including hardness, tensile strength and % elongation. In order to solve a multi response optimization problem, the traditional Taguchi approach is insufficient. To overcome this constraint, a multi criteria decision making approach, namely, techniques for order preference by similarity to ideal solution (TOPSIS) is applied in the present study [13]. The optimal result indicates that the multi response characteristics of the AA6063-O during the submerged friction stir welding process can be enhanced through the TOPSIS approach. The Analysis of Variance (ANOVA) was carried out to investigate the significant parameter for the submerged friction stir welding process. The mechanical properties of the submerged FSW are compared with normal FSW joints.

scholarly journals Analysis of Tools used in Friction Stir Welding process

2018 ◽  
Vol 8 (6) ◽  
Author(s):  
Akshansh Mishra ◽  
Adarsh Tiwari ◽  
Mayank Kumar Shukla ◽  
A. Razal Rose
Keyword(s):  
Friction Stir Welding ◽  
Critical Role ◽  
Base Material ◽  
Welding Process ◽  
Tool Geometry ◽  
Work Piece ◽  
Friction Stir ◽  
Tool Shoulder ◽  
Tool Pin ◽  
Joining Process

A relatively new joining process, friction stir welding (FSW) produces no fumes; uses no filler material; and can join aluminium alloys, copper, magnesium, zinc, steels, and titanium. FSW sometimes produces a weld that is stronger than the base material. The tool geometry plays a critical role in material flow and governs the transverse rate at which FSW can be conducted. The tool serves three primary functions, i.e., (a) heating of the work piece, (b) movement of material to produce the joint, and (c) containment of the hot metal beneath the tool shoulder. Heating is created within the work piece by friction between both the rotating tool pin and shoulder and by severe plastic deformation of the work.

scholarly journals Assessment of Friction Stir Welding on Aluminium 3D Printing Materials

2019 ◽  
Vol 8 (4) ◽  
pp. 10975-10980
Keyword(s):  
Friction Stir Welding ◽  
3D Printing ◽  
Review Paper ◽  
Base Material ◽  
Welding Process ◽  
Secondary Process ◽  
Powder Bed ◽  
Friction Stir ◽  
Friction Stir Welding Process ◽  
Joining Process

This review paper will discuss about the joining process of Aluminium 3D printing materials by using friction stir welding process. Currently, the studies on the joining of 3D printing materials by friction stir welding are very limited. Through this review, the joining materials characteristics such as weld efficiency, hardness and microstructure after friction stir welding process will be discussed to identify the behavior of weld joint materials. Understanding the friction stir welding process on 3D printing materials is importance in order to support the future advancement of 3D printing technology in terms of 3D printing part repairing activity and the secondary process such as the joining of 3D printing parts. In this paper, the fundamental concept of friction stir welding and powder bed fusion 3D printing is discussed. At the end of the review, the summary of friction stir welding process on Aluminium 3D printing materials concluded that the joining process is feasible to weld the materials with joint efficiency 83.3% and modify the base material characteristic of the 3D printing materials.

An analytical and experimental investigation considering the effect of material flow velocity on tensile strength of a steel alloy joint produced by friction stir welding process

2020 ◽  
pp. 095440622093631
Author(s):  
Behzad Hadi ◽  
ME Aalami-Aleagha ◽  
Saeed Feli
Keyword(s):  
Friction Stir Welding ◽  
Flow Velocity ◽  
Analytical Method ◽  
Rotational Speed ◽  
Material Flow ◽  
Welding Process ◽  
Linear Speed ◽  
Friction Stir ◽  
Friction Stir Welding Process ◽  
Tool Pin

In this paper, the effects of linear speed, rotational speed, and tool radius of the pin and shoulder are investigated on the material flow velocity in friction stir welds. To obtain the maximum material flow velocity by an analytical method, a suggested relation is introduced for the rotational speed and tool optimum radius. The derived relation is based on the assumption of a velocity field in the stirring region. Besides, the effect of the linear speed on material flow velocity is investigated based on continuity and momentum equations. Finally, by using the experimental method and checking the mechanical properties of the welded parts obtained with different rotational speed, linear speed, and tool dimensions, the proposed analytical model is validated. The results indicate that in the friction stir welding process, the significant component effect on the stirring process is generated through the tool pin radius size. Besides, increasing the material flow velocity in the boundary layer increases the yield and ultimate strength of welds. To achieve the high-quality welds, rotational speed and other tool dimensions must be selected considering the equation extracted from the analytical method. Also, to make the maximum life for the pin and its components in friction stir welding of high melting point metals such as steel alloys, the operation is adjusted at a lower linear speed to prevent the destruction of the tool and improve the quality of the joint.

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