scholarly journals The effect of Friction Stir Processing on the fatigue life of MIG-Laser hybrid welded joints as compared to conventional FSW 6082-T6 aluminium joints

2009 ◽  
Author(s):  
A. Els-Botes ◽  
D. G. Hattingh ◽  
K. V. Mjali
Keyword(s):  
Fatigue Life ◽  
Friction Stir Processing ◽  
Welded Joints ◽  
Friction Stir ◽  
Laser Hybrid

scholarly journals Effect of Friction Stir Processing on Gas Tungsten Arc-Welded and Friction Stir-Welded 5083-H111 Aluminium Alloy Joints

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Sipokazi Mabuwa ◽  
Velaphi Msomi
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Aluminium Alloy ◽  
Friction Stir Processing ◽  
Welded Joints ◽  
Ultrafine Grain ◽  
Dimple Size ◽  
Friction Stir ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

This paper presents the analysis of the friction stir-processed aluminium alloy 5083-H111 gas tungsten arc-welded and friction stir-welded joints. The comparative analysis was performed on the processed and unprocessed gas tungsten arc-welded and friction stir-welded joints of similar aluminium alloy 5083-H111. The results showed a clear distinction between the friction stir processed joints and unprocessed joints. There is a good correlation observed between the microstructural results and the tensile results. Ultrafine grain sizes of 4.62 μm and 7.177 μm were observed on the microstructure of the friction stir-processed friction stir-welded and gas tungsten arc-welded joints. The ultimate tensile strength for friction stir-welded and gas tungsten arc-welded before friction stir processing was 153.75 and 262.083 MPa, respectively. The ultimate tensile strength for friction stir processed friction stir-welded joint was 303.153 MPa and gas tungsten arc-welded joints one was 249.917 MPa. The microhardness values for the unprocessed friction stir-welded and gas tungsten arc-welded joints were both approximately 87 HV, while those of the friction stir-processed ones were 86.5 and 86 HV, respectively. The application of friction stir processing transformed the gas tungsten arc morphology from brittle to ductile dimples and reduced the ductile dimple size of the unprocessed friction stir-welded joints from the range of 4.90–38.33 μm to 3.35–15.59 μm.

A review on effect of friction stir processing on the welded joints

2020 ◽  
Author(s):  
Harshadkumar H. Jadav ◽  
Vishvesh Badheka ◽  
Daulat Kumar Sharma ◽  
Gautam Upadhyay
Keyword(s):  
Friction Stir Processing ◽  
Welded Joints ◽  
Friction Stir

Fatigue life improvement of mig welded aluminium T-joints by friction stir processing

2014 ◽  
Vol 61 ◽  
pp. 244-254 ◽  
Author(s):  
J.D.M. Costa ◽  
J.S. Jesus ◽  
A. Loureiro ◽  
J.A.M. Ferreira ◽  
L.P. Borrego
Keyword(s):  
Fatigue Life ◽  
Friction Stir Processing ◽  
T Joints ◽  
Friction Stir ◽  
Life Improvement

Fatigue life improvement by friction stir processing of 5083 aluminium alloy MIG butt welds

2014 ◽  
Vol 70 ◽  
pp. 68-74 ◽  
Author(s):  
L.P. Borrego ◽  
J.D. Costa ◽  
J.S. Jesus ◽  
A.R. Loureiro ◽  
J.M. Ferreira
Keyword(s):  
Fatigue Life ◽  
Aluminium Alloy ◽  
Friction Stir Processing ◽  
Butt Welds ◽  
Friction Stir ◽  
Life Improvement

Friction Stir Processing of Cast NiAl Bronze

2007 ◽  
Vol 539-543 ◽  
pp. 3721-3726 ◽  
Author(s):  
Murray W. Mahoney ◽  
Christian B. Fuller ◽  
William H. Bingel ◽  
Michael Calabrese
Keyword(s):  
Tensile Strength ◽  
Fatigue Life ◽  
Friction Stir Processing ◽  
Material Flow ◽  
Lessons Learned ◽  
Friction Stir ◽  
Tool Materials ◽  
Surface Areas ◽  
Percent Increase ◽  
Long Life

Friction stir processing (FSP) of cast NiAl bronze has resulted in significant increases in properties including more than doubling the yield greater that 40 percent increase in the threshold fatigue life; all achieved while increasing ductility. These and other strength, greater than a 60 percent increase in tensile strength, and property improvements were realized following studies of FSP procedures specifically for NiAl bronze. Within this manuscript, FSP procedures and other “lessons learned” are presented. Details of property improvements are documented elsewhere within this conference proceedings (see Fuller et al.). Presented herein are tool designs for efficient material flow, tool materials capable of long life at 1000°C, rastering procedures covering large surface areas, and other results pertinent to achieve improved properties in cast NiAl bronze following friction stir processing.

scholarly journals Review on Friction Stir Processed TIG And Friction Stir Welded Dissimilar Alloy Joints

2019 ◽  
Author(s):  
Sipokazi Mabuwa ◽  
Velaphi Msomi
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Friction Stir Processing ◽  
Welded Joints ◽  
Aluminium Alloys ◽  
Knowledge Gap ◽  
Friction Stir ◽  
Dissimilar Alloys ◽  
The Status

There is an increase towards reducing the weight of structures through the use of aluminium alloys in different industries like aerospace, automotive, etc. This growing interest would lead towards using dissimilar aluminium alloys which would require welding. TIG and friction stir welding are the well-known techniques that are currently suitable for joining dissimilar aluminium alloys. The welding of dissimilar alloys has its own dynamics which impact on the quality of the weld. This then suggests that there should be a process which can be used to improve the dissimilar alloys welds post their production. Friction stir processing is viewed as one of the techniques that could be used to improve the mechanical properties of the material. This paper reports on the status and the advancement of FSW, TIG and FSP technique. It further looks at the variation use of FSP on TIG and FSW welded joints with the purpose of identifying the knowledge gap.

scholarly journals A Comparative Study on Fatigue Response of Aluminum Alloy Friction Stir Welded Joints at Various Post-Processing and Treatments

2021 ◽  
Vol 5 (3) ◽  
pp. 93 ◽  
Author(s):  
Soran Hassanifard ◽  
Ahmad Varvani-Farahani
Keyword(s):  
Fatigue Life ◽  
Welded Joints ◽  
Solution Treatment ◽  
Welding Process ◽  
Rolling Process ◽  
Alumina Powder ◽  
Post Processing ◽  
Friction Stir ◽  
Copper Foils

The present study examines the fatigue of friction stir welded (FSW) aluminum 6061, 7075, 1060 joints followed by (i) in situ and sequential rolling (SR) processes, (ii) plastic burnishing (iii) solution-treatment artificial aging (STA), (iv) local alloying through depositing thin copper foils, and (v) inserting alumina powder in the weld nugget zone (NZ). The microstructural features and fatigue life of post-processed joints were compared with those of as-welded joints. The in situ rolling technique offered simultaneous rolling and welding operations of aluminum joints, while through the sequential rolling process, the top surface of FSW joints was rolled after the welding process. The fatigue life of in situ rolled samples was increased as the ball diameter of welding tool increased. The fatigue life of friction stir welded joints after a low-plasticity burnishing process was noticeably promoted. The addition of 1 wt.% alumina in the NZ of joints resulted in a significant elevation on fatigue life of friction stir spot welded joints, while an increase in alumina powder to 2.5 wt.% adversely affected fatigue strength. Weld NZ was alloyed through the insertion of copper foils between the faying surfaces of joints. This localized alloy slightly improved the fatigue life of joints; however, its effects on fatigue life were not as influential as STA heat-treated or in situ rolled joints. The microstructure of weld joints was highly affected through post-processing and treatments, resulting in a substantial influence on the fatigue response of FSW aluminum joints.

scholarly journals Influence of Friction Stir Processing on Mechanical Behavior of 2507 SDSS

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 369 ◽  
Author(s):  
Hafiz M. Abubaker ◽  
Necar Merah ◽  
Fadi A. Al-Badour ◽  
Jafar Albinmousa ◽  
Ahmad A. Sorour
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Fatigue Life ◽  
Duplex Stainless Steel ◽  
Friction Stir Processing ◽  
Base Material ◽  
Pressure Vessels ◽  
Friction Stir

Duplex stainless steel (DSS) is used for desalination equipment, pressure vessels, marine applications, offshore applications, and in oil/gas plants where a highly corrosive environment is present. Super duplex stainless steel (SDSS) 2507 has excellent mechanical properties, such as high strength, high toughness, high fatigue life, and high corrosion resistance. Friction stir processing (FSP) is used to refine the grain structure of the processed region such that properties like strength, hardness, fracture toughness, fatigue life, and corrosion resistance are enhanced. In this paper, an optimized friction stir process of 2507 SDSS is carried out to refine the microstructure of the material in order to improve its mechanical properties. Microstructure analysis revealed that grains were refined from a size of around 160 µm in the base material to 2–30 µm in the processed zone. This grain size reduction resulted in improved strength, hardness, and fracture toughness of the material by up to 14%, 11%, and 12%, respectively. However, FSP has reduced the fracture strain by about 30%.

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