Process Relationship in High-Stress Friction Coupled with Complex Shaped Counterbody and Friction Stir Welding Al-Mg-Sc-Zr Alloy

2022 ◽  
Vol 1049 ◽  
pp. 39-44
Author(s):  
Andrey Chumaevskii ◽  
Denis Gurianov ◽  
Anastasiya Gusarova ◽  
Anna Zykova ◽  
Aleksandr Panfilov ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Complex Shape ◽  
High Stress ◽  
Large Crystal ◽  
Friction Zone ◽  
Friction Stir ◽  
Model Research ◽  
Alloy Material ◽  
Distinguishing Features ◽  
Zr Alloy

Model research tests of plastic deformation, fragmentation and flow of aluminum alloy material of Al-Mg-Sc-Zr system under high loaded friction in pair with a steel counterbody of a complex shape and comparison of the obtained result with the structure formed by friction stir welding have been carried out. The conducted studies show that the structure formed by extrusion of the material from the friction zone and its compaction in the channel of the counterbody is, in general, close in structure to the structure formed by friction stir welding of similar material. The distinguishing features of the structure formed in the model experiments on friction include the introduction into the stirring zone of material with deformed large-crystal structure, increased grain size of the stirring zone, the presence of defects and differences in the geometry of the stirring zone.

scholarly journals Friction-stir welding of an Al–Mg–Sc–Zr alloy in as-fabricated and work-hardened conditions

2014 ◽  
Vol 600 ◽  
pp. 159-170 ◽  
Author(s):  
S. Malopheyev ◽  
V. Kulitskiy ◽  
S. Mironov ◽  
D. Zhemchuzhnikova ◽  
R. Kaibyshev
Keyword(s):  
Friction Stir Welding ◽  
Friction Stir ◽  
Zr Alloy

scholarly journals Fatigue Behaviour of 7N01-T4 Aluminium Alloy Welded by Ultrasonic-Assisted Friction Stir Welding

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4582 ◽  
Author(s):  
Zhiqiang Zhang ◽  
Changshu He ◽  
Ying Li ◽  
Jingxun Wei ◽  
Menggang Zhai ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Residual Stresses ◽  
Ultrasonic Vibration ◽  
Fatigue Cracks ◽  
High Stress ◽  
Fatigue Behaviour ◽  
Second Phase ◽  
Friction Stir ◽  
Stress Levels ◽  
Ultrasonic Assisted

This study investigates the effects of axial ultrasonic vibration on the microstructure evolution, residual stresses distribution and fatigue fracture behaviour of a 7N01-T4 joint, and demonstrates that ultrasonic vibration can significantly promote the flow of plasticised metals, expand the stirred zone (SZ) width and refine the grain size. The longitudinal residual stresses of the joints are dominant, and the peak longitudinal residual stresses of the thermo-mechanically affected zone (TMAZ) on the advancing side (AS) (TMAZ-AS) in the ultrasonic-assisted friction stir welding (UAFSW) joint are 31.5 MPa lower than those in the friction stir welding (FSW) joint. Compared to that of FSW joints, the fatigue strength of UAFSW joints increases by 20 MPa at 107 cycles (stress ratio of R = 0.1). At high-stress levels, crack initiation occurs at the TMAZ-AS, and is mainly attributed to high residual stresses and second-phase particles. At low-stress levels, fatigue cracks are likely to initiate in the transition zone (TZ).

Improved Recrystallization Resistance and Welding Properties of Cold-Rolled Al-Mg Alloy Sheets by Microalloying with Sc and Zr

2021 ◽  
Vol 1035 ◽  
pp. 17-24
Author(s):  
Hao Wu ◽  
Zhi Kai Zheng ◽  
Si Meng Ren ◽  
Shu Lei Li ◽  
Hu Wang ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Welded Joints ◽  
Alloy Sheet ◽  
Mg Alloy ◽  
Softening Effect ◽  
Welding Temperature ◽  
Friction Stir ◽  
Alloy Increase ◽  
Welding Properties ◽  
Zr Alloy

The effects of Sc and Zr element on the recrystallization behavior and microstructure evolution of Al-Mg alloy had been researched in this paper, and meanwhile, the microstructure and mechanical properties of the friction stir welding joints were also analyzed. The results show that the recrystallization and grain growth behavior of Al-Mg-Sc-Zr alloy can be inhibited effectively by microalloying with Sc and Zr. Compared with Al-Mg and Al-Mg-Zr alloys, the recrystallization start temperature and finish temperature of Al-Mg-Sc-Zr alloy increase significantly, and the strength of alloy sheet which subjected to stabilizing annealing is increased by more than 50MPa. Moreover, the recrystallization softening effect of the welded joints microstructure, which caused by the welding temperature field and welding heat input, can be weaken by microalloying with Sc and Zr, the width of recrystallization zone is reduced, the microstructure and properties of the welded joints are improved. The friction stir welding coefficients of Al-Mg-Sc-Zr alloy increases to 86.9%.

Study of Nonuniform In-Plane and In-Depth Residual Stress of Friction Stir Welding

2003 ◽  
Vol 125 (2) ◽  
pp. 201-208 ◽  
Author(s):  
Min Ya ◽  
Fulong Dai ◽  
Jian Lu
Keyword(s):  
Residual Stress ◽  
Friction Stir Welding ◽  
Stress Gradient ◽  
High Stress ◽  
Hole Drilling ◽  
Friction Stir ◽  
Hole Drilling Method ◽  
Incremental Hole Drilling ◽  
Longitudinal Residual Stress ◽  
Drilling Method

Friction stir welding (FSW) is a newly developed welding technique that can join aluminum alloys of low fusion weldability. The conventional hole-drilling method does not consider the nonuniform in-plane stress around the drilled hole, it is no longer valid for the residual stress of FSW which has high stress gradient. However, assuming the relaxation of in-plane nonuniform residual stress to be uniform on a small increment of the boundary of the hole, the recently developed Moire´ interferometry incremental hole-drilling (MIIHD) method can be used. Residual stress of a thin plate of friction stir welded aluminum alloy was studied by MIIHD. The longitudinal residual stress distribution in the transversal direction and through the thickness was obtained and compared with results by strain gage method.

Friction-stir welding of ultra-fine grained sheets of Al–Mg–Sc–Zr alloy

2015 ◽  
Vol 624 ◽  
pp. 132-139 ◽  
Author(s):  
S. Malopheyev ◽  
S. Mironov ◽  
V. Kulitskiy ◽  
R. Kaibyshev
Keyword(s):  
Friction Stir Welding ◽  
Friction Stir ◽  
Fine Grained ◽  
Zr Alloy

Quantitative wear analysis of H13 steel tool during friction stir welding of Cu-0.8%Cr-0.1%Zr alloy

Wear ◽  
2017 ◽  
Vol 378-379 ◽  
pp. 82-89 ◽  
Author(s):  
Pankaj Sahlot ◽  
Kaushal Jha ◽  
G.K. Dey ◽  
Amit Arora
Keyword(s):  
Friction Stir Welding ◽  
H13 Steel ◽  
Friction Stir ◽  
Steel Tool ◽  
Wear Analysis ◽  
Zr Alloy

Microstructure and Mechanical Properties of Cu-Cr-Zr Alloy by Friction Stir Welding

2012 ◽  
Vol 602-604 ◽  
pp. 608-611
Author(s):  
Di Qiu He ◽  
Rui Lin Lai ◽  
Shao Hua Xu ◽  
Kun Yu Yang ◽  
Shao Yong Ye ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Rotation Speed ◽  
Base Material ◽  
Traverse Speed ◽  
Nugget Zone ◽  
Alloy Plate ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties ◽  
Zr Alloy

In this study, Cu-Cr-Zr alloy joints are successfully fabricated by friction stir welding (FSW). Defect-free weld are produced on 12mm thick Cu-Cr-Zr alloy plate useing a non-consumable tool with a specially designed and shoulder with a constant rotation speed and a fixed traverse speed. The effect of friction stir welding (FSW) on the microstructure and mechanical properties of Cu-Cr-Zr alloy joints are investigated in details: The joints showed the presence of various zones such as nugget zone (NZ) and thermo-mechanically affected zone (TMAZ) and base metal (BM), the microhardness and the tensile strength of welded joints are lower than that of the base material.

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