scholarly journals Role of tool rotational speed in influencing microstructural evolution, residual-stress formation and tensile properties of friction-stir welded AZ80A Mg alloy

2018 ◽  
Vol 52 (5) ◽  
pp. 607-614 ◽  
Author(s):  
P. Sevvel ◽  
C. Satheesh
Keyword(s):  
Residual Stress ◽  
Tensile Properties ◽  
Microstructural Evolution ◽  
Rotational Speed ◽  
Mg Alloy ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Stress Formation ◽  
Az80a Mg Alloy

Influence of tool rotational speed on microstructural characteristics of dissimilar Mg alloys during friction stir welding

2019 ◽  
Vol 43 (1) ◽  
pp. 132-141 ◽  
Author(s):  
P. Sevvel ◽  
C. Satheesh ◽  
V. Jaiganesh
Keyword(s):  
Friction Stir Welding ◽  
Heat Affected Zone ◽  
Rotational Speed ◽  
Mg Alloy ◽  
Tool Rotational Speed ◽  
Microstructural Characteristics ◽  
Friction Stir ◽  
Dissimilar Friction Stir Welding ◽  
Speed Range ◽  
Az80a Mg Alloy

Dissimilar friction stir welding of the AZ80A Mg alloy as the advancing side and the AZ91C Mg alloy as the retreating side was carried out at a constant feed rate of 75 mm/min using a taper cylindrical pin profiled tool at different tool rotational speeds. Defect free welds were produced in the 700–900 rpm rotational speed range. During friction stir welding, extrusion of metal took place in the advancing side and this extruded material was dynamically recrystallized and redeposited on the retreating side. This experimental investigation revealed that friction stir welding leads to the formation of comparatively finer sized grains on the retreating side of the thermo-mechanically affected zone compared to grains in the thermo-mechanically affected zone on the advancing side. Moreover, the heat affected zone of AZ80A possessed fine sized grains compared to the heat affected zone of AZ91C. Additionally, increasing tool rotational speed influenced the tensile strength of the fabricated joints.

Role of tool rotational speed on the tribological characteristics of magnesium based AZ61A/TiC composite developed via friction stir processing route

2020 ◽  
Vol 2 (101) ◽  
pp. 60-75
Author(s):  
P. Sagar ◽  
A. Handa
Keyword(s):  
Friction Stir Processing ◽  
Rotational Speed ◽  
Research Work ◽  
Wear Behaviour ◽  
Processing Route ◽  
Tool Rotational Speed ◽  
Tribological Behaviour ◽  
Friction Stir ◽  
Mechanism Research

Purpose: A new composite material was prepared and Different properties such as hardness and tribological behaviour of the fabricated metal matrix composite (MMC) was investigated and compared with the base AZ61A magnesium alloy. Design/methodology/approach: For the current research work, state-of-the-art technology, Friction stir processing (FSP) was performed to develop magnesium based AZ61A/TiC composite at optimized set of machine parameters. Findings: Increasing tool rotational speed ultimately leads in enhanced hardness, which further gives superior tribological properties as compared to base AZ61A alloy. Wear observations suggests a combination of abrasive and adhesive wear mechanism. Research limitations/implications: More microstructural and mechanical properties can be examined. Practical implications: The idea behind selecting AZ61A is mainly due to its increasing use in bicycle pedals and military equipment’s where at certain places it needs to encounter friction. In this current work, microhardness study and wear behaviour of AZ61A/TiC composite processed via FSP were examined. Originality/value: Paper is completely new and no work has been done till date considering this material and preparing composite with nanoparticles TiC.

Correlative Analysis Between Tensile Properties and Tool Rotational Speeds of Friction Stir Welded Similar Aluminium Alloy Joints

2021 ◽  
Vol 9 (2) ◽  
pp. 58-78
Author(s):  
Velaphi Msomi ◽  
Busiswa Tracey Jantjies
Keyword(s):  
Friction Stir Welding ◽  
Tensile Properties ◽  
Rotational Speed ◽  
Critical Parameter ◽  
Welding Parameters ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Correlative Analysis ◽  
Fsw Parameters ◽  
The Impact

Friction stir welding (FSW) is considered as the new joining technique which does not involve fumes like any traditional joining techniques. The attainment of good weld depends on proper combination of FSW parameters, and this combination varies with the materials that are being welded. The tool rotational speed is known as the most critical parameter towards the generation of heat required to produce the weld in friction stir welding. This parameter plays an important role in restructuring the stir zone. The variation of this parameter may yield certain results which are dependent on the type of materials being welded. This paper reports on the impact of the rotational speed variation on the tensile properties of AA6082-T6 joints. The rotational speed was varied while keeping all the other welding parameters constant. The analysis was performed comparatively on the specimens that were sampled from different locations of the joint. The joints produced through the rotational speed of 600 rpm showed good tensile properties compared to joints produced through other rotational speeds.

FRICTION STIR WELDING OF NYLON -6: EFFECT OF PROCESS PARAMETERS ON MECHANICAL AND MICROSTRUCTURAL PROPERTIES

2017 ◽  
Vol 79 (6) ◽  
Author(s):  
N. Ethiraj ◽  
T. Sivabalan ◽  
C. Vijaya Raghavan ◽  
Shubham Mourya
Keyword(s):  
Friction Stir Welding ◽  
Tensile Properties ◽  
Process Parameters ◽  
Welded Joints ◽  
Rotational Speed ◽  
Nylon 6 ◽  
Microstructural Properties ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Mechanical And Microstructural Properties

Friction stir welding (FSW) is solid state joining process with more advantages than that of fusion welding. Nylon -6 is one of the engineering plastics used widely in various industrial applications. The main aim of this research work is to investigate the effect of tool rotational speed and tool traversing speed on the mechanical and microstructural properties of the nylon-6 butt welded joints made by FSW. The FSW process was performed in a computer numerically controlled (CNC) vertical milling machine using a cylindrical tool with threaded pin made of heat treated high carbon high chromium (HCHCr) steel. The tensile testing and microscopic examinations were carried out to study the mechanical and microstructural properties of the welded joints. In visual inspection, it is observed that the excessive flashes are observed on either sides of the weld line in all cases. From the results, it is observed that the maximum tensile properties are achieved in a joint made which is approximately 18% and 26% of the parent material’s ultimate tensile strength (UTS) and yield strength (YS) respectively with the tool rotational speed 1200 rpm and the tool traversing speed of 30 mm/min within the experimented process parameters. Overall, the tensile properties of the welded joints made using the experimented process parameters are very much lower than the parent material.

Tensile Properties of Friction Stir Welded AZ31B Mg Alloy

2007 ◽  
Vol 124-126 ◽  
pp. 1357-1360
Author(s):  
Seon Mi Ha ◽  
Sang Shik Kim ◽  
Dong Yim Chang ◽  
Chang Gil Lee ◽  
Sung Joon Kim
Keyword(s):  
Heat Treatment ◽  
Tensile Properties ◽  
Microstructural Evolution ◽  
Tensile Ductility ◽  
Tensile Behavior ◽  
Mg Alloy ◽  
Reduction Mechanism ◽  
Friction Stir ◽  
Heat Treated ◽  
Optical Micrographs

The effect of prior T4 heat treatment and subsequent microstructural evolution on tensile behavior of friction stir welded (FSWed) AZ31B-H24 alloy was examined in this study. Selected AZ31B-H24 plates were prior T4 heat treated at 400 for 24 hours and subsequently friction stir welded. The tensile properties, optical micrographs and SEM fractographs for FSWed AZ31B-T4 specimens were compared with those for the H24 counterparts. Prior T4 heat treatment tended to decrease the tensile ductility reduction in FSWed AZ31B-H24 specimen. The tensile ductility reduction mechanism as associated with prior T4 heat treatment is discussed based on detailed micrographic and fractographic observations.

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