Effect of tool rotation rate on constituent particles in a friction stir processed 2024Al alloy

2015 ◽  
Vol 160 ◽  
pp. 64-67 ◽  
Author(s):  
Somayeh Pasebani ◽  
Indrajit Charit ◽  
Rajiv S. Mishra
Keyword(s):  
Rotation Rate ◽  
Friction Stir ◽  
Tool Rotation Rate ◽  
Tool Rotation

scholarly journals Study on the Joining of Titanium and Aluminum Dissimilar Alloys by Friction Stir Welding

2011 ◽  
Vol 5 (1) ◽  
pp. 256-261 ◽  
Author(s):  
Yuhua Chen ◽  
Changhua Liu ◽  
Geping Liu
Keyword(s):  
Titanium Alloy ◽  
Shear Strength ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Welding Speed ◽  
Rotation Rate ◽  
Influence Of Process Parameters ◽  
Friction Stir ◽  
Tool Rotation Rate ◽  
Tool Rotation

Titanium alloy TC1 and Aluminum alloy LF6 were butt jointed and lap jointed by friction stir welding (FSW), and the influence of process parameters on formation of weld surface, cross-section morphology and strength were studied. The results show that, Titanium and Aluminum dissimilar alloy is difficult to be butt joined by FSW, and some defects such as cracks and grooves are easy to occur. When the tool rotation rate is 950 r/min and the welding speed is 118 mm/min, the tensile strength of the butt joint is 131MPa which is the highest. FSW is suitable for lap joining of TC1 Titanium alloy and LF6 Aluminum alloy dissimilar materials, an excellent surface appearance is easy to obtain, but the shear strength of the lap welding joint is not high. At the welding speed of 60 mm/min and the tool rotation rate of 1500 r/min, the lap joint has the largest shear strength of 48 MPa. At the welding speed of 150 mm/min and the tool rotation rate of 1500 r/min, crack like a groove occurs on the interface and the shear strength is zero.

Effect of Welding Parameters on Microstructure and Tensile Properties of Friction Stir Welded 6061 AL Joints

2009 ◽  
Vol 618-619 ◽  
pp. 41-44 ◽  
Author(s):  
Ai Han Feng ◽  
Dao Lun Chen ◽  
Zong Yi Ma
Keyword(s):  
Tensile Properties ◽  
Welding Speed ◽  
Rotation Rate ◽  
Welding Parameters ◽  
Nugget Zone ◽  
Fine Needle ◽  
Friction Stir ◽  
Tool Rotation Rate ◽  
The Relationship ◽  
Tool Rotation

The present investigation is aimed at evaluating the influence of tool rotation rate and welding speed on the microstructure, tensile properties, and fracture mode of 6061 Al-T651 alloy after friction stir welding (FSW). TEM results revealed that in the nugget zone (NZ), FSW resulted in the dissolution of fine needle-shaped precipitates that previously existed in the base metal. At a given rotation rate of 1400rpm, the yield strength (YS) and ultimate tensile strength (UTS) of the welded joints increased with increasing welding speed from 200 to 600mm/min. However, the UTS of the joints was nearly independent of the rotation rate. Furthermore, the relationship between the hardness distribution and fracture location has also been identified.

scholarly journals Friction Stir Welding of 1Cr11Ni2W2MoV Martensitic Stainless Steel: Numerical Simulation Based on Coupled Eulerian Lagrangian Approach Supported with Experimental Work

2021 ◽  
Vol 11 (7) ◽  
pp. 3049
Author(s):  
Mohamed Ragab ◽  
Hong Liu ◽  
Guan-Jun Yang ◽  
Mohamed M. Z. Ahmed
Keyword(s):  
Numerical Simulation ◽  
Stainless Steel ◽  
Friction Stir Welding ◽  
Rotation Rate ◽  
Cost Effective ◽  
Element Model ◽  
Fusion Welding ◽  
Friction Stir ◽  
Tool Rotation Rate ◽  
Tool Rotation

1Cr11Ni2W2MoV is a new martensitic heat-resistant stainless steel utilized in the manufacturing of aero-engine high-temperature bearing components. Welding of this type of steel using fusion welding techniques causes many defects. Friction stir welding (FSW) is a valuable alternative. However, few investigations have been performed on the FSW of steels because of the high melting point and the costly tools. Numerical simulation in this regard is a cost-effective solution for the FSW of this steel in order to optimize the parameters and to reduce the number of experiments for obtaining high-quality joints. In this study, a 3D thermo-mechanical finite element model based on the Coupled Eulerian Lagrangian (CEL) approach was developed to study the FSW of 1Cr11Ni2W2MoV steel. Numerical results of metallurgical zones’ shape and weld appearance at different tool rotation rates of 250, 350, 450 and 550 rpm are in good agreement with the experimental results. The results revealed that the peak temperature, plastic strain, surface roughness and flash size increased with an increase in the tool rotation rate. Lack-of-fill defect was produced at the highest tool rotation rate of 650 rpm. Moreover, an asymmetrical stir zone was produced at a high tool rotation rate.

Understanding Process and Property Relationships in Aluminum Alloy Friction Stir Welds

2007 ◽  
Vol 539-543 ◽  
pp. 207-214 ◽  
Author(s):  
Anthony P. Reynolds
Keyword(s):  
Process Development ◽  
Process Variables ◽  
Pertinent Literature ◽  
Friction Stir ◽  
Weld Microstructure ◽  
Tool Rotation Rate ◽  
Weld Properties ◽  
Process Property ◽  
Published Research ◽  
Tool Rotation

Friction stir welding (FSW) has been in use for nearly fifteen years and a significant body of published research regarding process/property/structure relationships is now available; particularly with respect to FSW of aluminum alloys. In this paper, some pertinent literature will be reviewed and an attempt made to tie the numerous experimental observations together through some unifying concepts. Examination of relationships among control and response FSW process variables (respectively e.g. tool rotation rate and torque) and weld microstructure and properties can provide important insight regarding how weld properties develop and how best to approach process development for different alloy classes.

The Effect of Friction Stir Process (FSP) on the Microstructure and Mechanical Properties of Mg-Gd-Ag-Zr Alloy

2013 ◽  
Vol 765 ◽  
pp. 726-730 ◽  
Author(s):  
Fei Yan Zheng ◽  
Li Ming Peng ◽  
Yu Juan Wu ◽  
Xue Wen Li ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Secondary Phase ◽  
Traverse Speed ◽  
Friction Stir Process ◽  
Friction Stir ◽  
Alloy Casting ◽  
Tool Rotation Rate ◽  
Tool Rotation ◽  
Zr Alloy

An Mg-13.0Gd-1.6Ag-0.3Zr (wt.%) alloy casting was subjected to friction stir processing (FSP) at a tool rotation rate of 500 rpm and a traverse speed of 100 mm/min. The effects of FSP on the microstructures in different zones and mechanical properties were investigated. It indicates that FSP can result in significant break-up and dissolution of the coarse eutectic secondary phase‑‑Mg5Gd-type, and remarkable grain refinement (~2.5 µm) in stirring zone (SZ). Therefore, the mechanical properties of the casting can be significantly improved after FSP, i.e., it exhibits an ultimate tensile strength of 341 MPa and an elongation of 17 %.

scholarly journals Design and Fabrication of Friction Stir Welding End-Effector for an ABB IRB1410 Robot

2016 ◽  
Vol 5 (2) ◽  
pp. 98
Author(s):  
Santosh Vanama
Keyword(s):  
Friction Stir Welding ◽  
High Strength ◽  
Fusion Welding ◽  
Fusion Temperature ◽  
End Effector ◽  
Friction Stir ◽  
Aluminum Sheets ◽  
Operation Pressure ◽  
Welding Processes ◽  
Tool Rotation

<p>The paper propose modelling and fabrication of friction stir welding end-effector for ABB IRB1410 robot. A dynamically developing version of pressure welding processes, join material without reaching the fusion temperature called friction stir welding. As friction stir welding occurs in solid state, no solidification structures are created thereby eliminating the brittle and eutectic phase’s common to fusion welding of high strength aluminium alloys. In this paper, Friction stir welding is applied to aluminum sheets of 2 mm thickness. A prototype setup is developed to monitor the evolution of main forces and tool temperature during the operation. Pressure of a gripper plays a major role for tool rotation and developing torque.  Fabrication of the tool has done. Force calculations are done by placing the sensors on the outer surface of gripper. Methods of evaluating weld quality are surveyed as well.</p>

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