scholarly journals Residual stress evaluation in friction stir welding of aluminum plates by means of acoustic emission and ultrasonic waves

2018 ◽  
Vol 46 (3) ◽  
pp. 230-237 ◽  
Author(s):  
S. Sadeghi ◽  
Zarif Karimi ◽  
M. Fotouhi ◽  
M. Hasani ◽  
Ahmadi Najafabadi ◽  
...  
Keyword(s):  
Residual Stress ◽  
Acoustic Emission ◽  
Friction Stir Welding ◽  
Ultrasonic Waves ◽  
Stress Evaluation ◽  
Friction Stir ◽  
Aluminum Plates

Residual stress evaluation in friction stir-welded aluminum plates using finite element method and acoustic emission

2016 ◽  
Vol 52 (4) ◽  
pp. 2103-2116 ◽  
Author(s):  
Ali Mahdian Ahi ◽  
Jalal Yousefi ◽  
Mehdi Ahmadi Najafabadi ◽  
Amir Esmaeilzare ◽  
Amir Refahi Oskouei
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Acoustic Emission ◽  
Stress Evaluation ◽  
Friction Stir ◽  
Aluminum Plates ◽  
Element Method

scholarly journals Effect of Trailing Intensive Cooling on Residual Stress and Welding Distortion of Friction Stir Welded 2060 Al-Li Alloy

2018 ◽  
Vol 37 (5) ◽  
pp. 397-403 ◽  
Author(s):  
Shude Ji ◽  
Zhanpeng Yang ◽  
Quan Wen ◽  
Yumei Yue ◽  
Liguo Zhang
Keyword(s):  
Residual Stress ◽  
Friction Stir Welding ◽  
Plastic Strain ◽  
Welding Process ◽  
Butt Joint ◽  
Welding Distortion ◽  
Welding Temperature ◽  
Friction Stir ◽  
Numerical Simulation Methods ◽  
Conventional Cooling

AbstractTrailing intensive cooling with liquid nitrogen has successfully applied to friction stir welding of 2 mm thick 2060 Al-Li alloy. Welding temperature, plastic strain, residual stress and distortion of 2060 Al-Li alloy butt-joint are compared and discussed between conventional cooling and trailing intensive cooling using experimental and numerical simulation methods. The results reveal that trailing intensive cooling is beneficial to shrink high temperature area, reduce peak temperature and decrease plastic strain during friction stir welding process. In addition, the reduction degree of plastic strain outside weld is smaller than that inside weld. Welding distortion presents an anti-saddle shape. Compared with conventional cooling, the reductions of welding distortion and longitudinal residual stresses of welding joint under intense cooling reach 47.7 % and 23.8 %, respectively.

Process - Property Correlation of Friction Stir Welding of Marine Grade Aluminium Alloy 5083 Using Finite Element Analysis

2021 ◽  
Vol 163 (A2) ◽  
Author(s):  
M Sahu ◽  
A Paul ◽  
S Ganguly
Keyword(s):  
Mechanical Properties ◽  
Residual Stress ◽  
Finite Element ◽  
Friction Stir Welding ◽  
Residual Stresses ◽  
Process Variables ◽  
Friction Stir ◽  
Stress Region ◽  
Longitudinal Residual Stress ◽  
Process Property

In this article, a 3D finite element based thermo-mechanical model for friction stir welding (FSW) of a marine-grade aluminium alloy 5083 is proposed. The model demonstrates the thermal evaluation and the distribution of residual stresses and strains under the variation of process variables. The temperature profile of the weld joint during the FSW process and the mechanical properties of the joints are also experimentally evaluated. The necessary calibration of the model for the correct implementation of the thermal loading, mechanical loading, and boundary conditions was performed using the experimental results. The model simulation and experimental results are analyses in view of the process-property correlation study. The residual stress was evaluated along, and across the weld, centreline referred as longitudinal and transverse residual stresses, respectively. The magnitude of longitudinal residual stress is noted 60-80% higher than that of the transverse direction. The longitudinal residual stress generated a tensile oval shaped stress region around the tool shoulder confined to a maximum distance of about 25mm from the axis of the tool along the weld line. It encompasses the weld-nugget to thermo-mechanically affected zone (TMAZ), while the parent metal region is mostly experiences the compressive residual stresses. However, the transverse residual stress region appears like wing shaped region spread out in both the advancing and retreating side of the weld and occupying approximately double the area as compared to the longitudinal residual stresses. Overall, the study revealed a corelation between the FSW process variables such as welding speed and the tool rotational speed with the residual stress and the mechanical properties of the joint.

scholarly journals Relationship between Microstructure, Residual Stress and Thermal Aspect in Friction Stir Welding of Aluminum AA1050

2019 ◽  
Vol 32 ◽  
pp. 889-894 ◽  
Author(s):  
Saoussan El Mouhri ◽  
Hamza Essoussi ◽  
Said Ettaqi ◽  
Stephane Benayoun
Keyword(s):  
Residual Stress ◽  
Friction Stir Welding ◽  
Friction Stir
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