Polycrystalline structure influence on the dinamic strength and fracture character in different zones of welding joint in aluminum alloy

2020 ◽  
pp. 10-18
Author(s):  
R.R. Balokhonov ◽  
◽  
V.A. Romanova ◽  
M.V. Sergeev ◽  
E.S. Emelianova ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Polycrystalline Structure ◽  
Welding Joint ◽  
Fracture Character

Influence of Polycrystalline Structure on Dynamic Strength and Fracture Character of an Aluminum Alloy in Different Welding Joint Zones

2020 ◽  
Vol 63 (5) ◽  
pp. 721-730
Author(s):  
R. R. Balokhonov ◽  
V. A. Romanova ◽  
M. V. Sergeev ◽  
E. S. Emelianova ◽  
E. M. Dymnich ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Dynamic Strength ◽  
Polycrystalline Structure ◽  
Welding Joint ◽  
Fracture Character

scholarly journals Stress corrosion behavior of friction stir welding joint of 7N01 aluminum alloy

2021 ◽  
Vol 15 ◽  
pp. 1130-1144
Author(s):  
Yuzhe Pan ◽  
Yu Wang ◽  
Fuqiang Guo ◽  
Tiehao Zhang ◽  
Kenji Matsuda ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Stress Corrosion ◽  
Corrosion Behavior ◽  
Friction Stir ◽  
Welding Joint

scholarly journals Eutectic structures in friction spot welding joint of aluminum alloy to copper

2014 ◽  
Vol 104 (19) ◽  
pp. 191901 ◽  
Author(s):  
Junjun Shen ◽  
Uceu F. H. Suhuddin ◽  
Maria E. B. Cardillo ◽  
Jorge F. dos Santos
Keyword(s):  
Aluminum Alloy ◽  
Spot Welding ◽  
Welding Joint ◽  
Friction Spot Welding

scholarly journals Microstructure and Mechanical Properties of Thick Plate Friction Stir Welds for 6082-T6 Aluminum Alloy

2019 ◽  
Vol 38 (2019) ◽  
pp. 525-532 ◽  
Author(s):  
Zhimin Liang ◽  
Xue Wang ◽  
Congwei Cai ◽  
Dianlong Wang
Keyword(s):  
Aluminum Alloy ◽  
Thick Plate ◽  
Frictional Heating ◽  
High Heat ◽  
Tensile Fracture ◽  
Alloy Plate ◽  
Friction Stir ◽  
Welding Joint ◽  
High Heat Input ◽  
Two Sides

Abstract6082-T6 aluminum alloy plate with thickness of 42mm was butt welded by friction stir welding (FSW) from two sides. The microstructures of the joints exhibited different grain sizes because of unequal frictional heating and plastic flow during FSW process. The transition from the heat affected zone (HAZ) to the nugget zone (NZ) in thermos-mechanical affected zone of advancing side (AS-TMAZ) was more sudden than thermos-mechanical affected zone of retreating side (RS-TMAZ). Kissing bond (KB) defect throughout the entire FSW joint was displayed both at the grain boundary and in the interior of the grain with semi-continuous bands. KB had no direct effect on tensile properties. Vickers hardness of the FSW joint was lower than the BM because its high heat input, dissolved and coarsened precipitates and little to the grain size after FSW. Hardness distribution of double-sided welding joint showed X-shaped area softening characteristics, that is to say the lowest hardness was the junction of two welding joint of NZ and the junction of TMAZ and HAZ. The tensile fracture position occurred in the lowest hardness region of the FSW joint, and it did not occur in the KB defect position.

scholarly journals The Effect of Plug Rotation Speed on Micro-Structure of Nugget Zone of Friction Plug Repair Welding Joint for 6082 Aluminum Alloy

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5287
Author(s):  
Defu Li ◽  
Xijing Wang
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Rotation Speed ◽  
Base Material ◽  
Weld Nugget ◽  
Nugget Zone ◽  
Repair Welding ◽  
Welding Joint ◽  
6082 Aluminum Alloy ◽  
Plug Repair

This paper carried out the friction plug repair welding of 6082 aluminum alloy keyhole defects by using the method of friction heating between shaft shoulder and base material. In addition, a well-formed friction plug welding joint was obtained at different plug rotation speeds. In order to study the influence mechanism of plug rotation speeds on the microstructure of the weld nugget zone, EBSD technology was used to analyze the grain morphology, grain size and grain boundary characteristics of the weld nugget zone under different rotation speeds of the plug rod. The results show that in the nugget zone, the grain was fine and equated crystals refinement, and there was a preferred orientation. The deformation texture components in the welded nugget zone increased with the plug rotation speed from 1600 to 2000 rpm. However, the grain size first decreased and then increased, while the components in the High-Angle Boundary first increased and then decreased.

The Effect of Single Pulse, Double Pulse and ForceArc MIG Welding Technology on Mechanical Properties of Welding Joint for 5083 Aluminum Alloy Used in High-Speed Train Body

2011 ◽  
Vol 337 ◽  
pp. 460-465
Author(s):  
Lei Su ◽  
Yuan Nie ◽  
Hua Ji ◽  
Chuan Ping Ma ◽  
Shao Hua Yan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
High Speed ◽  
Single Pulse ◽  
Double Pulse ◽  
High Speed Train ◽  
Welding Joint ◽  
5083 Aluminum Alloy ◽  
Very High

The technology of lightening manufacture for aluminum alloy train body is one key of manufacturing high-speed train . The train body is a whole bearing loading tubular structure which is welded together by the large, hollow, thin-walled aluminum extrusion. Therefore，the demand for welding quality of aluminum alloy train body is very high，and the mechanical properties of joints severely affected the overall strength of welded components. To solve this problem ,we use the 421 EXPERT forceArc MIG of PHOENIX series of German EWM company to perform three types of experiments of single pulse, double pulse, and forceArc welding ,and then effect of three welding methods on mechanical properties of Welding joint for 5083 aluminum alloy used in high-speed train body is compared.

Dissimilar Friction Stir Spot Welding without Key Hole between AZ31B Magnesium Alloy and 5052 Aluminum Alloy

2013 ◽  
Vol 652-654 ◽  
pp. 2320-2325 ◽  
Author(s):  
Xi Jing Wang ◽  
Ting Kai Guo ◽  
Zhong Ke Zhang ◽  
Pei Chung Wang ◽  
Ji Peng Shi ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Magnesium Alloy ◽  
Spot Welding ◽  
Welding Process ◽  
Friction Stir Spot Welding ◽  
Tensile Fracture ◽  
Az31b Magnesium Alloy ◽  
Friction Stir ◽  
Welding Joint ◽  
The Impact

To study the impact of the welding process parameters on the spot weld surface molding, mechanical performance and the stir zone microstructure, we use friction stir spot welding without keyhole method which designed and developed by ourselves to carry on the lap welding between 1mm sheet of AZ31B magnesium alloy and 3mm sheet of 5052 aluminum alloy with magnesium on top and aluminum bottom. The result of the orthogonal test shows that the shoulder friction time have a greater impact on the forming of the surface of the welding joint; When the rotating speed of 1000 r/min, shoulder friction time of 4s, pin length of 3.5mm, the tensile shearing force of the welded joint achieves its maximum value of 2.46 KN.Through observating the microstructure of the welding joint’s section stirring zone, we found the typical joint microstructure of Dissimilar metal. Through analyzing the microstructure of the tensile fracture, we found that fracture was cleavage fracture.We also found the fracture mechanism of the welding joint was cleavage fracture in microcosm but brittle fracture macrocosm.

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