Analysis of the Main Factors Affecting the Surface Morphology of FSJ Joint

2014 ◽  
Vol 1027 ◽  
pp. 183-186 ◽  
Author(s):  
Yong Fang Deng ◽  
Dun Wen Zuo ◽  
Bo Song
Keyword(s):  
Surface Morphology ◽  
Linear Relationship ◽  
Rotational Speed ◽  
Rotation Speed ◽  
Feed Speed ◽  
Factors Affecting ◽  
Friction Stir ◽  
Joint Surfaces ◽  
Line Spacing ◽  
Main Factors

An attempt is made here to analyze the effect of the process parameter and shoulder of tool on the surface topography of FSJ (friction stir joining) joint. It is found that, it is a linear relationship between the feed speed and arc lines spacing, and the slope decreases as feed speed increasing. As the rotational speed increasing, the arc line spacing reduces. While FSJ processes completed at different parameters contain the same ratio between the feed speed and the rotation speed, the arc line spacing of the joint surfaces is the same. The shoulder of tool can increase the width of joint lines, refine arc lines structure, reduce the flash in the retreating side, but increase the flash in the advancing side.

Effect of Double Shoulder Tool Rotational Speed on Thermo-Physical Characteristics of Friction Stir Welded 16mm Thick Nylon6

2015 ◽  
Vol 799-800 ◽  
pp. 251-255 ◽  
Author(s):  
Adeel Zafar ◽  
Mokhtar Awang ◽  
Sajjad Raza Khan ◽  
Sattar Emamian
Keyword(s):  
Friction Stir Welding ◽  
Linear Relationship ◽  
Cross Sections ◽  
Rotational Speed ◽  
Visual Inspection ◽  
Rotation Speed ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Polymer Joining ◽  
Microstructural Examination

Friction stir welding (FSW) of polymers is relatively a new concept among modern polymer joining techniques. This study demonstrates the applicability of FSW on 16mm thick nylon-6 plates at constant welding rate of 25mm/min and varying rotational speed between 300 to 1000RPM. A special designed tool was fabricated which has double shoulder and right-hand threaded pin profile. It has shown excellent results at relatively lower rotation speeds. Visual inspection and microstructural examination of cross sections showed that the cavities and tunnel defects appeared only at higher rotational speeds. A linear relationship was observed between temperature and rotation speed.

The Effect of Eccentricity of the Tool on the Surface Morphology of FSJ Joint

2015 ◽  
Vol 656-657 ◽  
pp. 387-390
Author(s):  
Yong Fang Deng ◽  
Dun Wen Zuo ◽  
Bo Song
Keyword(s):  
Surface Morphology ◽  
Surface Topography ◽  
Joint Line ◽  
Joint Surface ◽  
Feed Speed ◽  
2024 Aluminum Alloy ◽  
Alloy Plate ◽  
Friction Stir ◽  
Line Spacing ◽  
Spacing Length

An attempt is made here to join 2024 aluminum alloy plate by friction stir joining (FSJ) using tools with different eccentricity. Joint surface morphology was observed, and the sizes of both arc line spacing and flash were measured. Furthermore, study the effect of eccentricity of the tool on the surface topography of FSJ joint and analyze the formation of the joint surface topography. It is found that, the space trajectory of long axis of shoulder which formed by the eccentricity of the tool determine the morphology of the arc lines; the ratio between the feed speed and the rotation speed determine the arc line spacing; length of time that long axis of shoulder squeeze the edge of the joint line in the advancing side and the retreating side determines the size of flash in both sides of the joint line. Arc lines were regularly distributed in the joint lines and there are also regular texture structure distributed in the flash of each side. The flash in the advancing side is less than the retreating side. Increasing the amount of eccentricity, it has litter effect on the arc line spacing but will destroy the arc lines morphology in the joint surface and promote the formation of filamentous flash structure in the both sides of the joint.

scholarly journals What factors affect lotus effect?

2018 ◽  
Vol 22 (4) ◽  
pp. 1737-1743 ◽  
Author(s):  
Chan-Juan Zhou ◽  
Dan Tian ◽  
Ji-Huan He
Keyword(s):  
Ionic Liquids ◽  
Surface Morphology ◽  
Size Effect ◽  
Contact Angles ◽  
Lotus Effect ◽  
Factors Affecting ◽  
Ph Values ◽  
Series Of Experiments ◽  
Main Factors ◽  
Self Cleaning

Lotus effect is the superhydrophobicity property, and widely used for self-cleaning in modern textile engineering. This paper reveals that the lotus effect is a kind of nanoeffect or size effect in nanotechnology, the surface morphology, solution?s molecule weight, and temperature are three main factors affecting the lotus effect. Solutions? pH values or ionic liquids are also discussed in this paper. A series of experiments are carried out to measure contact angles for different solutions/liquids on the lotus surface at different temperature.

Effect of welding parameters on mechanical properties and microstructure of friction stir welded brass joints

2018 ◽  
Vol 106 (6) ◽  
pp. 606 ◽  
Author(s):  
İnan Geçmen ◽  
Zarif Çatalgöl ◽  
Mustafa Kemal Bilici
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Rotation Speed ◽  
Stir Zone ◽  
Weld Strength ◽  
Welding Parameters ◽  
Feed Speed ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Tool Rotation

Friction stir welding is a method developed for the welding of high-alloy aluminum materials which are difficult to combine with conventional welding methods. Friction stir welding of MS 63 (brass) plates used different tools (tapered cylindrical, tapered threaded cylindrical), tool rotational speeds (1040, 1500, 2080 rpm) and traverse speeds (30,45,75,113 mm.min−1). Tensile, bending, radiography and microstructure tests were carried out to determine the mechanical properties of brass plates joined by friction stir welding technique. Microstructure characterization studies were based on optical microscope and SEM analysis techniques. In addition, after joining operations, radiographs were taken to see the internal structure failure. Brass sheets were successfully joined to the forehead in the macrostructure study. In the evaluation of the microstructure, it was determined that there were four regions of base metal, thermomechanically affected zone (TMEB), heat-affected zone (HAZ) and stir zone. In both welding tools, the weld strength increased with increasing tool rotation speed. The particles in the stir zone are reduced by increasing of the tool rotation speed. Given the strength and % elongation values, the highest weld strength was achieved with tapered pin tool with a tool rotation speed of 1040 rpm and a tool feed speed of 113 min−1.

Effect of the Impact Load on Joining Region of the Friction Stir Jointing for 7022 Aluminum Alloy

2013 ◽  
Vol 568 ◽  
pp. 21-24
Author(s):  
Hong Feng Wang ◽  
J.L. Wang ◽  
W.W. Song ◽  
Dun Wen Zuo ◽  
X.L. Duan
Keyword(s):  
Aluminum Alloy ◽  
Impact Toughness ◽  
Base Metal ◽  
Process Parameters ◽  
Rotation Speed ◽  
Impact Load ◽  
Feed Speed ◽  
Friction Stir ◽  
The Impact ◽  
Joining Process

The impact experiment of the joining workpiece of the friction stir jointing for 7022 aluminum alloy was made by the impact load experiment machine. The objective was studying the effect of the different joining process parameters of the FSJ on impact toughness. The results showed the impact toughness of the joining region was lower than that of the base metal when the rotation speed of the tool was 300rpm and the feed speed was 30 and 50mm•min-1, the impact toughness of the joining region of the other joining process parameters was higher than that of the base metal. The impact toughness of the joining region was the best when the rotation speed of the tool was 400rpm and the feed speed was 100mm•min-1. It is higher than 22.3% of the base metal. The impact fracture of the joining region was mainly dimple; only fracture edge appeared a small amount of the quasi cleavage. The fracture presented good toughness.

scholarly journals Study of the Forces Generated during Nonlinear Friction Stir Welding: Circular Trajectory

2013 ◽  
Vol 554-557 ◽  
pp. 1007-1013
Author(s):  
Nejah Jemal ◽  
Sandra Chevert ◽  
Laurent Langlois ◽  
Gabriel Abba
Keyword(s):  
Friction Stir Welding ◽  
Rotation Speed ◽  
Welding Process ◽  
Friction Stir Weld ◽  
Welding Parameters ◽  
Feed Speed ◽  
Circular Trajectory ◽  
Friction Stir ◽  
Plane Plate ◽  
Tool Trajectory

Friction stir welding is known for his capability to achieve a linear weld. However, more investigation on a curved friction stir weld trajectory is still required to industrialize this promising process. In the same perspective, this study is aimed at analyzing the influence of nonlinear tool trajectory in friction stir welding. The study considers a variety of circular trajectories on the plane plate and uses them for experimentation while considering different welding parameters of rotation speed feed speed, axial force and tilt angle.In FSW, the tool is generally needed to be tilted with a constant angle in the travel direction during welding process. Therefore, for circular trajectory, an adequate roll and pitch angle are assigned to the spindle in all tool positions. The paper presents the effect of circular trajectory on longitudinal and transversal forces generated during circular welding. The results are then compared with the experimental results which are obtained using linear FSW. Furthermore, the experimental investigation includes relationship between tool trajectory and weld quality.

Effect of Welding Conditions on Sheets’ Interface Properties in Friction Stir Spot Welding of Copper

2019 ◽  
Author(s):  
Ahmed Mahgoub ◽  
Neçar Merah ◽  
Abdelaziz Bazoune
Keyword(s):  
Surface Morphology ◽  
Rotational Speed ◽  
Spot Welding ◽  
Dwell Time ◽  
Friction Stir Spot Welding ◽  
Tensile Failure ◽  
Welding Parameters ◽  
Welding Condition ◽  
Friction Stir ◽  
Joint Fracture

Abstract Friction Stir Spot Welding (FSSW) is a solid-state joining technique widely applied to high conductive metals. In this paper, the effects of FSSW parameters, namely, rotational speed (N), plunging rate (V) and dwell time (DT) on the joint fracture mode and fractured surface morphology were investigated using scanning electron microscopy (SEM). The effect of the abovementioned welding parameters on the microhardness profile along the sheets’ interface was also investigated to gain insight into the strength of the joint and the width of the bonding ligament. Two conditions were considered for each parameter 1200 rpm and 900 rpm for N, 60 mm/min and 20 mm/min for V, 4 and 2 seconds for DT. The welding condition 1200 rpm rotational speed, 20 mm/min plunging rate and 2 seconds dwell time showed a wider bonding ligament, relatively higher elongation, higher tensile failure load, and greater microhardness on the sheets’ interface. Dimple surface morphology (DSM) with regular dimples along the stir zone was also observed at the abovementioned set of process parameters.

scholarly journals Effects of Rotation Speed on Microstructure and Mechanical Properties in Ti/Cu Dissimilar Friction Stir Welding

2021 ◽  
Vol 59 (12) ◽  
pp. 886-892
Author(s):  
Yong-Jae Lee ◽  
Won-Ki Jung ◽  
Se-Eun Shin ◽  
Dong-Geun Lee
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Intermetallic Compounds ◽  
Microstructural Evolution ◽  
Rotational Speed ◽  
Rotation Speed ◽  
Metal Flow ◽  
Dissimilar Welding ◽  
Friction Stir ◽  
Dissimilar Friction Stir Welding

The dissimilar welding of titanium and copper by fusion welding is very difficult because the melting points of the materials are very highly different and strong brittle intermetallic compounds (IMCs) can be easily produced in welded zone and heat-affected zone, etc. Friction stir welding was employed as a type of solid-state welding for Ti/Cu dissimilar welding to obtain a sound welded zone and reduce the total process cost. This study investigated how the metal flow of the welded zone changes according to the variation in the rotational speed of the tool, from 450 rpm to 600 rpm. When the rotational speed was too high, the plastic flow of the softened material increased and intermetallic compounds such as TiCu, Ti2Cu3, and Ti2Cu, were generated in the Cu region of the welded zone. The microstructural evolution of AS (Advancing Side) and RS (Retreating Side) were investigated and the soundness of the welded zone and its mechanical properties were evaluated through the microstructural evolution. A high hardness value of 200 Hv or more was exhibited in some points, due to the formation of intermetallic compounds in the RS (Cu) region. Ti/Cu dissimilar friction stir welding at a welding speed of 50 mm/min and an appropriate rotation speed of 500 rpm showed a good welded zone and mechanical properties.

Analysis of Friction and Wear Properties of 7075 Aluminum Alloy Modified by FSP

2020 ◽  
Vol 866 ◽  
pp. 135-142
Author(s):  
Sheng Rong Liu ◽  
Jian Li Wang ◽  
Hong Feng Wang ◽  
Xiao Le Ge ◽  
Jia Fei Pu
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Rotation Speed ◽  
Feed Speed ◽  
7075 Aluminum Alloy ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Different Temperatures ◽  
Modified Layer ◽  
Tool Rotation

In this paper, the wear resistance of the different parameter (the tool rotation speed and feed speed) modified layer of the hot rolled 7075 aluminum alloy by the friction stir processing (FSP) were studied. The wear mechanism was explored by analyzing the surface morphologies of the modified layer after wear. The results showed that the wear resistance of 7075 aluminum alloy modified by FSP was superior to that of the base metal at different temperatures. The comprehensive wear resistance was better when the tool rotation speed and the feed speed were 500 rpm and 60 mm/min under different temperatures. Furthermore, the FSP parameters had a significant influence on the wear resistance of the modified layer. When the FSP parameters were too high or too low, the wear resistance would be reduced and the adhesive wear would appear. In addition, the modified layers obtained by different parameters received poor wear resistance when the temperature at high values.

scholarly journals Analysis of metallographic structure and hardness of magnesium alloy area using friction stir welding

2019 ◽  
Vol 28 ◽  
pp. 096369351987276
Author(s):  
Wang Hongfeng ◽  
Zuo Dunwen ◽  
Liu Shengrong ◽  
Song Weiwei
Keyword(s):  
Grain Size ◽  
Friction Stir Welding ◽  
Magnesium Alloy ◽  
Process Parameters ◽  
Rotation Speed ◽  
Weld Zone ◽  
Weld Nugget ◽  
Feed Speed ◽  
Friction Stir ◽  
Metallographic Structure

The present work envisages the friction stir welding of AZ40 M magnesium alloy to analyze the influence of different process parameters (rotation speeds: 600, 800, and 1000 r/min; feed speeds: 100, 120, and 150 mm/min) on the metallographic structure at different locations in the weld zone. The welded regularity, analysis of the distribution law of the weld surface, and section hardness value (HV) were obtained under different welding process parameters. Our results show that, when the current feed rate was constant, the grain size of the weld nugget increased with an increase in the rotation speed. When the rotation speed was constant, the grain size of the weld nugget area decreased initially, which subsequently increased with an increase in the advance speed. When the rotation speed was 600 r/min and the feed speed was 120 mm/min, the nugget region grain was uniform, fine, and exhibited a highest HV.

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